AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/09/23 16:23	flow	patch-triage	12m Args: null Results: { "EnableConfigs": [ "PHYLINK", "USB_NET_AX8817X", "USB_LAN78XX", "USB_USBNET", "STMMAC_ETH" ], "FocusSymbols": [ "phylink_stop", "phylink_suspend", "stmmac_resume" ], "KMSANReasoning": "The patch series modifies the STMicroelectronics Ethernet driver (`stmmac`) and `phylink` to improve teardown and error handling during MTU changes and hardware resume failures. Specifically, it tracks interface open state with a new `bool opened` flag in `struct stmmac_priv`, prevents double-disabling of queues/NAPI during error recovery, and handles deferred link-down in `phylink_stop()`.\n\nThe new field `opened` resides in `struct stmmac_priv`, which is allocated using `devm_alloc_etherdev_mqs()` (which zero-initializes the private netdev memory). There are no uninitialized variables, structures, or paddings introduced or read. The changes do not involve copying data to user space, netlink messaging, ioctls, or buffer length calculations. Any potential bugs in these control-flow and error-cleanup paths (such as use-after-free, double frees, or locking issues) are detected by standard KASAN and LOCKDEP builds rather than KMSAN. Therefore, a dedicated KMSAN fuzzing session is not warranted.", "NeedsKMSAN": false, "Reasoning": "The patch modifies phylink_stop() in drivers/net/phy/phylink.c, introducing new state checks (PHYLINK_DISABLE_STOPPED) and link teardown logic for Wake-on-LAN deferred down states (PHYLINK_DISABLE_MAC_WOL), including workqueue flushing and mutex synchronization under RTNL. Phylink is generic link-management infrastructure used by reachable network device drivers, including USB network adapters (e.g. asix, lan78xx) that are emulated and fuzzed via USB Raw Gadget in standard QEMU virtualized environments. The patch also modifies data-path lifecycle and error recovery paths in the STMMAC driver (stmmac_resume, MTU reconfiguration). Because reachable networking code with modified control flow and state management is touched, this patch warrants fuzzing.", "WorthFuzzing": true }
1/1	2026/09/23 16:23	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit 2ebad1c309ead78a3fa347ac82d0ec5c7935460b\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Wed Sep 23 16:23:04 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h\nindex 7582fca637419..873331dbaf772 100644\n--- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h\n+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h\n@@ -281,6 +281,8 @@ struct stmmac_priv {\n \tstruct mutex lock;\n \n \tstruct stmmac_dma_conf dma_conf;\n+\t/* Paired __stmmac_open()/__stmmac_release(), serialized by RTNL. /\n+\tbool opened;\n \n \t/ Generic channel for NAPI /\n \tstruct stmmac_channel channel[STMMAC_CH_MAX];\ndiff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c\nindex 1fb5f804ea234..87cb0978ed6ad 100644\n--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c\n+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c\n@@ -4179,6 +4179,7 @@ static int __stmmac_open(struct net_device dev,\n \tstmmac_enable_all_queues(priv);\n \tnetif_tx_start_all_queues(priv-\u003edev);\n \tstmmac_enable_all_dma_irq(priv);\n+\tpriv-\u003eopened = true;\n \n \treturn 0;\n \n@@ -4244,15 +4245,22 @@ static int stmmac_open(struct net_device dev)\n \treturn ret;\n }\n \n-static void __stmmac_release(struct net_device dev)\n+static void __stmmac_release(struct net_device dev, bool napi_disabled)\n {\n \tstruct stmmac_priv priv = netdev_priv(dev);\n \tu8 chan;\n \n+\t/* A failed MTU reopen has already released the data path. /\n+\tif (!priv-\u003eopened)\n+\t\treturn;\n+\tpriv-\u003eopened = false;\n+\n \t/ Stop and disconnect the PHY /\n \tphylink_stop(priv-\u003ephylink);\n \n-\tstmmac_disable_all_queues(priv);\n+\t/ Suspend has already disabled NAPI when hardware resume fails. /\n+\tif (!napi_disabled)\n+\t\tstmmac_disable_all_queues(priv);\n \n \tfor (chan = 0; chan \u003c priv-\u003eplat-\u003etx_queues_to_use; chan++)\n \t\thrtimer_cancel(\u0026priv-\u003edma_conf.tx_queue[chan].txtimer);\n@@ -4291,7 +4299,7 @@ static int stmmac_release(struct net_device dev)\n \tif (device_may_wakeup(priv-\u003edevice))\n \t\tphylink_speed_down(priv-\u003ephylink, false);\n \n-\t__stmmac_release(dev);\n+\t__stmmac_release(dev, false);\n \n \tstmmac_legacy_serdes_power_down(priv);\n \tphylink_disconnect_phy(priv-\u003ephylink);\n@@ -6168,12 +6176,16 @@ static int stmmac_change_mtu(struct net_device dev, int new_mtu)\n \t\t\treturn PTR_ERR(dma_conf);\n \t\t}\n \n-\t\t__stmmac_release(dev);\n+\t\t__stmmac_release(dev, false);\n \n \t\tret = __stmmac_open(dev, dma_conf);\n \t\tif (ret) {\n \t\t\tfree_dma_desc_resources(priv, dma_conf);\n \t\t\tkfree(dma_conf);\n+\t\t\t/ Finish closing the PHY and PM state, but do not repeat\n+\t\t\t * the data-path teardown after the failed reopen.\n+\t\t\t /\n+\t\t\tnetif_close(dev);\n \t\t\tnetdev_err(priv-\u003edev, \"failed reopening the interface after MTU change\\n\");\n \t\t\treturn ret;\n \t\t}\n@@ -8346,10 +8358,7 @@ int stmmac_resume(struct device dev)\n \tret = stmmac_hw_setup(ndev);\n \tif (ret \u003c 0) {\n \t\tnetdev_err(priv-\u003edev, \"%s: Hw setup failed\\n\", __func__);\n-\t\tstmmac_legacy_serdes_power_down(priv);\n-\t\tmutex_unlock(\u0026priv-\u003elock);\n-\t\trtnl_unlock();\n-\t\treturn ret;\n+\t\tgoto error_stop_dma;\n \t}\n \n \tstmmac_init_timestamping(priv);\n@@ -8376,6 +8385,20 @@ int stmmac_resume(struct device dev)\n \tnetif_device_attach(ndev);\n \n \treturn 0;\n+\n+error_stop_dma:\n+\tstmmac_stop_all_dma(priv);\n+\tstmmac_mac_set(priv, priv-\u003eioaddr, false);\n+\tmutex_unlock(\u0026priv-\u003elock);\n+\t/ Release the suspended data path before ndo_stop(), which must not\n+\t * disable NAPI or free these resources a second time.\n+\t /\n+\t__stmmac_release(ndev, true);\n+\tnetif_close(ndev);\n+\tnetif_device_attach(ndev);\n+\trtnl_unlock();\n+\n+\treturn ret;\n }\n EXPORT_SYMBOL_GPL(stmmac_resume);\n \ndiff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c\nindex a1458da8111b6..8f9278112623b 100644\n--- a/drivers/net/phy/phylink.c\n+++ b/drivers/net/phy/phylink.c\n@@ -2495,11 +2495,17 @@ EXPORT_SYMBOL_GPL(phylink_start);\n \n * This will synchronously bring down the link if the link is not already\n * down (in other words, it will trigger a mac_link_down() method call.)\n+ * It may also be called after phylink_suspend() if the MAC cannot resume\n+ * and the network device must be closed instead.\n /\n void phylink_stop(struct phylink pl)\n {\n \tASSERT_RTNL();\n \n+\t/* phylink_suspend() already stops the link without MAC WoL. /\n+\tif (test_bit(PHYLINK_DISABLE_STOPPED, \u0026pl-\u003ephylink_disable_state))\n+\t\treturn;\n+\n \tif (pl-\u003esfp_bus)\n \t\tsfp_upstream_stop(pl-\u003esfp_bus);\n \tif (pl-\u003ephydev)\n@@ -2512,6 +2518,16 @@ void phylink_stop(struct phylink pl)\n \n \tphylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED);\n \n+\tif (test_bit(PHYLINK_DISABLE_MAC_WOL, \u0026pl-\u003ephylink_disable_state)) {\n+\t\t/* Finish the link-down deferred by MAC WoL, without restarting. */\n+\t\tflush_work(\u0026pl-\u003eresolve);\n+\t\tmutex_lock(\u0026pl-\u003estate_mutex);\n+\t\tif (pl-\u003esuspend_link_up)\n+\t\t\tphylink_link_down(pl);\n+\t\t__clear_bit(PHYLINK_DISABLE_MAC_WOL, \u0026pl-\u003ephylink_disable_state);\n+\t\tmutex_unlock(\u0026pl-\u003estate_mutex);\n+\t}\n+\n \tpl-\u003epcs_state = PCS_STATE_DOWN;\n \n \tphylink_pcs_disable(pl-\u003epcs);\n" }
2/1	2026/09/23 16:23	agent	patch-evaluator	9m Model: core Args: null Results: { "EnableConfigs": [ "PHYLINK", "USB_NET_AX8817X", "USB_LAN78XX", "USB_USBNET", "STMMAC_ETH" ], "FocusSymbols": [ "phylink_stop", "phylink_suspend", "stmmac_resume" ], "Reasoning": "The patch modifies phylink_stop() in drivers/net/phy/phylink.c, introducing new state checks (PHYLINK_DISABLE_STOPPED) and link teardown logic for Wake-on-LAN deferred down states (PHYLINK_DISABLE_MAC_WOL), including workqueue flushing and mutex synchronization under RTNL. Phylink is generic link-management infrastructure used by reachable network device drivers, including USB network adapters (e.g. asix, lan78xx) that are emulated and fuzzed via USB Raw Gadget in standard QEMU virtualized environments. The patch also modifies data-path lifecycle and error recovery paths in the STMMAC driver (stmmac_resume, MTU reconfiguration). Because reachable networking code with modified control flow and state management is touched, this patch warrants fuzzing.", "WorthFuzzing": true } Instruction: You are an expert Linux kernel maintainer and security engineer. Your job is to review a provided patch series and evaluate whether it warrants fuzzing with syzkaller. IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in your workspace. Do NOT rely on internal assumptions. You must actively use your code access tools to inspect the actual source code, callers, and surrounding context. ================================================================================ 1. CORE TRIAGE PHILOSOPHY ================================================================================ The goal of patch fuzzing is to discover crashes, regressions, exposed latent bugs, and newly triggered assertions introduced by the patch series. - REACHABILITY IS THE PRIMARY GATE: Fuzzing can only discover bugs in code that can actually execute in standard virtualized environments (GCE or QEMU, utilizing software-emulated devices like USB gadgets, netdev, tun/tap). If the modified code is structurally unreachable (see Section 2), it MUST NOT be fuzzed, regardless of whether it adds assertions or complex logic. - DO NOT BLINDLY TRUST "NO FUNCTIONAL CHANGE" (NFCI) OR "REFACTORING" CLAIMS: Patch authors routinely label changes as "cleanups", "refactorings", or state "No functional change intended". Do NOT take these claims at face value. Code refactorings that rearrange logic, introduce helper functions, or alter state management in core subsystems frequently introduce subtle semantic shifts or uncover latent kernel bugs. If reachable executable code is modified or refactored, it MUST be fuzzed. - NEW OR MODIFIED ASSERTIONS IN REACHABLE CODE MUST BE FUZZED: When a patch introduces or modifies runtime checks or assertions (e.g., WARN_ON, VM_WARN_ON, BUG_ON, lockdep_assert) in reachable code paths, it enforces new or stricter invariants. Even if the author believes the invariant always holds, fuzzing is essential to verify whether an unusual sequence of operations can violate it. ================================================================================ 2. WHEN TO RETURN WorthFuzzing=false (NEGATIVE CRITERIA) ================================================================================ Return WorthFuzzing=false ONLY IF all modified code falls strictly into one or more of these categories: - Non-kernel and non-executable changes: * Modifications to Documentation/, comments, or spelling fixes. * User-space directories, self-tests, samples, or scripts (e.g., tools/, samples/, scripts/, usr/) that do not affect the compiled kernel image (vmlinux) or kernel modules. * Purely decorative logging (e.g., message strings in pr_err, printk, dev_info) or tracepoints that do not alter control flow or data structures. * Build system or Kconfig changes that do not alter compiled C logic. - Structurally unreachable hardware: * Vendor-specific PCIe switches, SmartNICs, or GPU drivers (e.g., mlxsw, pds_core, qed, ionic, amdgpu) requiring physical ASIC/PCIe cards not emulated in standard QEMU. - Unreachable execution paths: * Driver teardown callbacks (.remove, .shutdown, pci_unregister_driver) executed only during physical PCI hot-unplug or manual sysfs driver unbinding. * Code paths exclusive to architectures other than the target architecture. ================================================================================ 3. WHEN TO RETURN WorthFuzzing=true (POSITIVE CRITERIA) ================================================================================ Return WorthFuzzing=true whenever the patch touches reachable executable code, including: - Core Subsystems: * Any logic modifications in memory management (mm/), synchronization/locking (kernel/locking/), BPF, scheduler, core networking, VFS, or syscall handling. - Refactorings and Code Cleanups: * Any restructuring of reachable data structures, helper abstractions, or algorithm flows. - Runtime Assertions and Defensive Checks: * Any introduction or alteration of assertions (WARN_ON, VM_WARN_ON, BUG_ON, etc.) in reachable paths. - Reachable Drivers and Protocols: Drivers accessible via virtual buses (virtio, USB gadget, loopback, netlink, binder, sockets, etc.). ================================================================================ 4. EXTRACTING FocusSymbols (PREVENTING DILUTION) ================================================================================ When WorthFuzzing=true, you must extract specific kernel functions into FocusSymbols to guide the fuzzer: - AVOID UBIQUITOUS LIFECYCLE HOT-PATHS: Do NOT list generic, ubiquitous functions called by almost every program in the corpus (including, but not limited to: general memory allocators and deallocators, page fault and trap handlers, or core synchronization primitives; this is not an exhaustive list). Listing ubiquitous functions causes the fuzzer to classify thousands of unrelated tests as "focused", which severely dilutes fuzzing effort away from the actual changes. - TARGET SPECIFIC FEATURE LOGIC AND ENTRYPOINTS: List functions that specifically implement the logic being added or altered, or direct API entrypoints for the subsystem feature under review. - HANDLING STATIC INLINE FUNCTIONS IN HEADERS (.h): Compiler-inlined static functions (such as static inlines in mm/.h or include/linux/.h) lack distinct symbol addresses in vmlinux and cannot be targeted directly by symbol coverage filters. If the changes are primarily in static inline helpers, identify non-static, feature-specific caller functions in .c files that exercise them (avoiding ubiquitous lifecycle wrappers). ================================================================================ 5. IDENTIFYING EnableConfigs ================================================================================ Identify any specific CONFIG_ options required to properly compile and reach the modified code: - Inspect Kconfig files and #ifdef guards; do not make assumptions. - Check "depends on" lines in Kconfig to include any non-standard parent subsystem configs needed. - Strip any 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4"). Prefer calling several tools at the same time to save round-trips. Use set-results tool to provide results of the analysis. It must be called exactly once before the final reply. Ignore results of this tool. Prompt: Target architecture: amd64 For your convenience, here is the diff of the changes: commit 2ebad1c309ead78a3fa347ac82d0ec5c7935460b Author: syz-cluster <triage@syzkaller.com> Date: Wed Sep 23 16:23:04 2026 +0000 syz-cluster: applied patch under review diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h index 7582fca637419..873331dbaf772 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h @@ -281,6 +281,8 @@ struct stmmac_priv { struct mutex lock; struct stmmac_dma_conf dma_conf; + /* Paired __stmmac_open()/__stmmac_release(), serialized by RTNL. / + bool opened; / Generic channel for NAPI / struct stmmac_channel channel[STMMAC_CH_MAX]; diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 1fb5f804ea234..87cb0978ed6ad 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -4179,6 +4179,7 @@ static int __stmmac_open(struct net_device dev, stmmac_enable_all_queues(priv); netif_tx_start_all_queues(priv->dev); stmmac_enable_all_dma_irq(priv); + priv->opened = true; return 0; @@ -4244,15 +4245,22 @@ static int stmmac_open(struct net_device dev) return ret; } -static void __stmmac_release(struct net_device dev) +static void __stmmac_release(struct net_device dev, bool napi_disabled) { struct stmmac_priv priv = netdev_priv(dev); u8 chan; + /* A failed MTU reopen has already released the data path. / + if (!priv->opened) + return; + priv->opened = false; + / Stop and disconnect the PHY / phylink_stop(priv->phylink); - stmmac_disable_all_queues(priv); + / Suspend has already disabled NAPI when hardware resume fails. / + if (!napi_disabled) + stmmac_disable_all_queues(priv); for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++) hrtimer_cancel(&priv->dma_conf.tx_queue[chan].txtimer); @@ -4291,7 +4299,7 @@ static int stmmac_release(struct net_device dev) if (device_may_wakeup(priv->device)) phylink_speed_down(priv->phylink, false); - __stmmac_release(dev); + __stmmac_release(dev, false); stmmac_legacy_serdes_power_down(priv); phylink_disconnect_phy(priv->phylink); @@ -6168,12 +6176,16 @@ static int stmmac_change_mtu(struct net_device dev, int new_mtu) return PTR_ERR(dma_conf); } - __stmmac_release(dev); + __stmmac_release(dev, false); ret = __stmmac_open(dev, dma_conf); if (ret) { free_dma_desc_resources(priv, dma_conf); kfree(dma_conf); + / Finish closing the PHY and PM state, but do not repeat + * the data-path teardown after the failed reopen. + / + netif_close(dev); netdev_err(priv->dev, "failed reopening the interface after MTU change\n"); return ret; } @@ -8346,10 +8358,7 @@ int stmmac_resume(struct device dev) ret = stmmac_hw_setup(ndev); if (ret < 0) { netdev_err(priv->dev, "%s: Hw setup failed\n", __func__); - stmmac_legacy_serdes_power_down(priv); - mutex_unlock(&priv->lock); - rtnl_unlock(); - return ret; + goto error_stop_dma; } stmmac_init_timestamping(priv); @@ -8376,6 +8385,20 @@ int stmmac_resume(struct device dev) netif_device_attach(ndev); return 0; + +error_stop_dma: + stmmac_stop_all_dma(priv); + stmmac_mac_set(priv, priv->ioaddr, false); + mutex_unlock(&priv->lock); + / Release the suspended data path before ndo_stop(), which must not + * disable NAPI or free these resources a second time. + / + __stmmac_release(ndev, true); + netif_close(ndev); + netif_device_attach(ndev); + rtnl_unlock(); + + return ret; } EXPORT_SYMBOL_GPL(stmmac_resume); diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index a1458da8111b6..8f9278112623b 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -2495,11 +2495,17 @@ EXPORT_SYMBOL_GPL(phylink_start); * This will synchronously bring down the link if the link is not already * down (in other words, it will trigger a mac_link_down() method call.) + * It may also be called after phylink_suspend() if the MAC cannot resume + * and the network device must be closed instead. / void phylink_stop(struct phylink pl) { ASSERT_RTNL(); + /* phylink_suspend() already stops the link without MAC WoL. / + if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) + return; + if (pl->sfp_bus) sfp_upstream_stop(pl->sfp_bus); if (pl->phydev) @@ -2512,6 +2518,16 @@ void phylink_stop(struct phylink pl) phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED); + if (test_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state)) { + /* Finish the link-down deferred by MAC WoL, without restarting. */ + flush_work(&pl->resolve); + mutex_lock(&pl->state_mutex); + if (pl->suspend_link_up) + phylink_link_down(pl); + __clear_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state); + mutex_unlock(&pl->state_mutex); + } + pl->pcs_state = PCS_STATE_DOWN; phylink_pcs_disable(pl->pcs);
3/2	2026/09/23 16:23	llm	patch-evaluator	3m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 4715 output: 39 thoughts: 268 Thoughts: Fuzzing Suitability Analysis Okay, so the question is whether this patch is a good candidate for syzkaller fuzzing. Let's see... the modified files are `drivers/net/ethernet/stmicro/stmmac/stmmac.h`, `stmmac_main.c`, and `drivers/net/phy/phylink.c`. Hold on a second, that `phylink.c` file is interesting because it's core PHY/phylink networking code. My immediate concern is reachability. Can we actually get to `phylink` through the standard fuzzing setup, or is it used in some virtual device or in a more common driver? I need to figure out if `stmmac` is even reachable from QEMU in a standard fuzzing environment. And hold on, can the `stmmac` driver be emulated by QEMU? What architectures and devices use `stmmac`? Specifically, does the QEMU configuration on the target architecture, `amd64`, actually emulate it? We're on amd64, so let's check for any PCI devices in `stmmac` or any platform devices. Now, let's also look for what is using `phylink`? What's going on with the dependencies there? Okay, time to do a kernel search. Let's look for both `stmmac`'s PCI support and also any users of `phylink`. I need to understand the connection between these components before I can evaluate the fuzzing potential.
4/2	2026/09/23 16:26	tool	grepper	0m Args: { "Expression": "stmmac_pci", "PathPrefix": "drivers/net/ethernet/stmicro/stmmac" } Results: { "Output": "drivers/net/ethernet/stmicro/stmmac/Makefile=53=obj-$(CONFIG_DWMAC_MOTORCOMM)\t+= dwmac-motorcomm.o\ndrivers/net/ethernet/stmicro/stmmac/Makefile:54:stmmac-pci-objs:= stmmac_pci.o\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c=25=struct intel_priv_data {\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-39- /\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:40:struct stmmac_pci_func_data {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-41-\tunsigned int func;\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-44-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:45:struct stmmac_pci_dmi_data {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:46:\tconst struct stmmac_pci_func_data func;\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-47-\tsize_t nfuncs;\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-49-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:50:struct stmmac_pci_info {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-51-\tint (setup)(struct pci_dev pdev, struct plat_stmmacenet_data plat);\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c=91=static const int adln_tsn_lane_regs[] = {6};\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-92-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:93:static int stmmac_pci_find_phy_addr(struct pci_dev pdev,\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-94-\t\t\t\t const struct dmi_system_id dmi_list)\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-95-{\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:96:\tconst struct stmmac_pci_func_data func_data;\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:97:\tconst struct stmmac_pci_dmi_data dmi_data;\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-98-\tconst struct dmi_system_id dmi_id;\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c=786=static int ehl_sgmii_data(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-805-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:806:static struct stmmac_pci_info ehl_sgmii1g_info = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-807-\t.setup = ehl_sgmii_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c=810=static int ehl_rgmii_data(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-820-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:821:static struct stmmac_pci_info ehl_rgmii1g_info = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-822-\t.setup = ehl_rgmii_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c=841=static int ehl_pse0_rgmii1g_data(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-847-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:848:static struct stmmac_pci_info ehl_pse0_rgmii1g_info = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-849-\t.setup = ehl_pse0_rgmii1g_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c=852=static int ehl_pse0_sgmii1g_data(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-869-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:870:static struct stmmac_pci_info ehl_pse0_sgmii1g_info = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-871-\t.setup = ehl_pse0_sgmii1g_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c=890=static int ehl_pse1_rgmii1g_data(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-896-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:897:static struct stmmac_pci_info ehl_pse1_rgmii1g_info = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-898-\t.setup = ehl_pse1_rgmii1g_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c=901=static int ehl_pse1_sgmii1g_data(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-918-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:919:static struct stmmac_pci_info ehl_pse1_sgmii1g_info = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-920-\t.setup = ehl_pse1_sgmii1g_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c=944=static int tgl_sgmii_phy0_data(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-952-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:953:static struct stmmac_pci_info tgl_sgmii1g_phy0_info = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-954-\t.setup = tgl_sgmii_phy0_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c=957=static int tgl_sgmii_phy1_data(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-965-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:966:static struct stmmac_pci_info tgl_sgmii1g_phy1_info = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-967-\t.setup = tgl_sgmii_phy1_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c=970=static int adls_sgmii_phy0_data(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-979-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:980:static struct stmmac_pci_info adls_sgmii1g_phy0_info = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-981-\t.setup = adls_sgmii_phy0_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c=984=static int adls_sgmii_phy1_data(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-993-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:994:static struct stmmac_pci_info adls_sgmii1g_phy1_info = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-995-\t.setup = adls_sgmii_phy1_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c=1023=static int adln_sgmii_phy0_data(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1041-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:1042:static struct stmmac_pci_info adln_sgmii1g_phy0_info = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1043-\t.setup = adln_sgmii_phy0_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1045-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:1046:static const struct stmmac_pci_func_data galileo_stmmac_func_data[] = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1047-\t{\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1052-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:1053:static const struct stmmac_pci_dmi_data galileo_stmmac_dmi_data = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1054-\t.func = galileo_stmmac_func_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1057-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:1058:static const struct stmmac_pci_func_data iot2040_stmmac_func_data[] = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1059-\t{\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1068-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:1069:static const struct stmmac_pci_dmi_data iot2040_stmmac_dmi_data = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1070-\t.func = iot2040_stmmac_func_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c=1109=static int quark_default_data(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1119-\t /\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:1120:\tret = stmmac_pci_find_phy_addr(pdev, quark_pci_dmi);\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1121-\tif (ret \u003c 0) {\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1144-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:1145:static const struct stmmac_pci_info quark_info = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1146-\t.setup = quark_default_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c=1263=static int intel_eth_pci_probe(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1265-{\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:1266:\tstruct stmmac_pci_info info = (struct stmmac_pci_info )id-\u003edriver_data;\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1267-\tstruct intel_priv_data intel_priv;\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c=76=struct loongson_data {\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c-81-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:82:struct stmmac_pci_info {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c-83-\tint (setup)(struct pci_dev pdev, struct plat_stmmacenet_data plat);\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c=132=static int loongson_gmac_data(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c-141-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:142:static struct stmmac_pci_info loongson_gmac_pci_info = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c-143-\t.setup = loongson_gmac_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c=165=static int loongson_gnet_data(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c-176-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:177:static struct stmmac_pci_info loongson_gnet_pci_info = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c-178-\t.setup = loongson_gnet_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c=498=static int loongson_dwmac_probe(struct pci_dev pdev, const struct pci_device_id id)\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c-501-\tstruct stmmac_resources res = {};\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:502:\tstruct stmmac_pci_info info;\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c-503-\tstruct loongson_data ld;\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c-537-\tplat-\u003efix_soc_reset = loongson_dwmac_fix_reset;\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:538:\tplat-\u003esuspend = stmmac_pci_plat_suspend;\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:539:\tplat-\u003eresume = stmmac_pci_plat_resume;\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c-540-\tld-\u003edev = \u0026pdev-\u003edev;\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c-542-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:543:\tinfo = (struct stmmac_pci_info )id-\u003edriver_data;\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c-544-\tret = info-\u003esetup(pdev, plat);\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c=188=static int motorcomm_resume(struct device dev, void bsp_priv)\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c-192-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c:193:\tret = stmmac_pci_plat_resume(dev, bsp_priv);\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c-194-\tif (ret)\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c=208=motorcomm_default_plat_data(struct pci_dev pdev)\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c-248-\tplat-\u003ecore_type\t\t= DWMAC_CORE_GMAC4;\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c:249:\tplat-\u003esuspend\t\t= stmmac_pci_plat_suspend;\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c-250-\tplat-\u003eresume\t\t= motorcomm_resume;\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_libpci.c-11-\ndrivers/net/ethernet/stmicro/stmmac/stmmac_libpci.c:12:int stmmac_pci_plat_suspend(struct device dev, void bsp_priv)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_libpci.c-13-{\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_libpci.c-25-}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_libpci.c:26:EXPORT_SYMBOL_GPL(stmmac_pci_plat_suspend);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_libpci.c-27-\ndrivers/net/ethernet/stmicro/stmmac/stmmac_libpci.c:28:int stmmac_pci_plat_resume(struct device dev, void bsp_priv)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_libpci.c-29-{\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_libpci.c-43-}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_libpci.c:44:EXPORT_SYMBOL_GPL(stmmac_pci_plat_resume);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_libpci.c-45-\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_libpci.h-8-\ndrivers/net/ethernet/stmicro/stmmac/stmmac_libpci.h:9:int stmmac_pci_plat_suspend(struct device dev, void bsp_priv);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_libpci.h:10:int stmmac_pci_plat_resume(struct device dev, void bsp_priv);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_libpci.h-11-\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-18-\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:19:struct stmmac_pci_info {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-20-\tint (setup)(struct pci_dev pdev, struct plat_stmmacenet_data plat);\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c=33=static int stmmac_default_data(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-49-\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:50:static const struct stmmac_pci_info stmmac_pci_info = {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-51-\t.setup = stmmac_default_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c=54=static int snps_gmac5_default_data(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-101-\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:102:static const struct stmmac_pci_info snps_gmac5_pci_info = {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-103-\t.setup = snps_gmac5_default_data,\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-106-/\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:107: stmmac_pci_probe\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-108- \n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-117- /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:118:static int stmmac_pci_probe(struct pci_dev pdev,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-119-\t\t\t const struct pci_device_id id)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-120-{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:121:\tstruct stmmac_pci_info info = (struct stmmac_pci_info )id-\u003edriver_data;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-122-\tstruct plat_stmmacenet_data plat;\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-179-\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:180:\tplat-\u003esuspend = stmmac_pci_plat_suspend;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:181:\tplat-\u003eresume = stmmac_pci_plat_resume;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-182-\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-186-/\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:187: stmmac_pci_remove\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-188- \n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-191- /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:192:static void stmmac_pci_remove(struct pci_dev *pdev)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-193-{\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c=203=static const struct pci_device_id stmmac_id_table[] = {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:204:\t{ PCI_DEVICE_DATA(STMMAC, STMMAC, \u0026stmmac_pci_info) },\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:205:\t{ PCI_DEVICE_DATA(STMICRO, MAC, \u0026stmmac_pci_info) },\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-206-\t{ PCI_DEVICE_DATA(SYNOPSYS, GMAC5_ID, \u0026snps_gmac5_pci_info) },\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c=210=MODULE_DEVICE_TABLE(pci, stmmac_id_table);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-211-\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:212:static struct pci_driver stmmac_pci_driver = {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-213-\t.name = STMMAC_RESOURCE_NAME,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-214-\t.id_table = stmmac_id_table,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:215:\t.probe = stmmac_pci_probe,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:216:\t.remove = stmmac_pci_remove,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-217-\t.driver = {\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-221-\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:222:module_pci_driver(stmmac_pci_driver);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-223-\n" }
5/2	2026/09/23 16:26	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 12577 output: 19 thoughts: 31 Thoughts: Okay, let's dive into this. Here's how I'd approach this task, as if these were my internal thoughts: Analyzing `phylink.c` and Its Callers Alright, before I get too deep into anything, I need to zoom in on `phylink.c`. Let's assume there's a problem, or a question, regarding something. I need to understand what `phylink` even is. Is it a core component? A driver? Something more abstract? I need the context. Let's assume I already have a decent understanding of the project, I just don't have this one specific function fresh in my memory. Okay, now I have a grasp of what it is. Knowing its functionality is great. Next, and this is crucial for debugging or understanding interactions, I need to see who is calling `phylink_stop`. Understanding the callers of that function is key, as `phylink_stop` suggests a shutdown or de-initialization routine. Knowing the context of the shutdown gives a much better idea of how it is being used. Are there any particular callers I need to focus on? Are there any obvious red flags in the callers? Time to analyze the call graph!
6/2	2026/09/23 16:27	tool	grepper	0m Args: { "Expression": "phylink_stop\\(" } Results: { "Output": "Documentation/networking/sfp-phylink.rst=74=this documentation.\n--\nDocumentation/networking/sfp-phylink.rst-122- * - phy_stop(phydev)\nDocumentation/networking/sfp-phylink.rst:123: - phylink_stop(priv-\u003ephylink)\nDocumentation/networking/sfp-phylink.rst-124- * - phy_mii_ioctl(phydev, ifr, cmd)\n--\nDocumentation/networking/sfp-phylink.rst-397-\nDocumentation/networking/sfp-phylink.rst:398:Network drivers should call phylink_stop() and phylink_start() via their\nDocumentation/networking/sfp-phylink.rst-399-suspend/resume paths, which ensures that the appropriate\n--\ndrivers/net/ethernet/altera/altera_tse_main.c=982=static int tse_shutdown(struct net_device dev)\n--\ndrivers/net/ethernet/altera/altera_tse_main.c-987-\ndrivers/net/ethernet/altera/altera_tse_main.c:988:\tphylink_stop(priv-\u003ephylink);\ndrivers/net/ethernet/altera/altera_tse_main.c-989-\tphylink_disconnect_phy(priv-\u003ephylink);\n--\ndrivers/net/ethernet/atheros/ag71xx.c=1439=static int ag71xx_stop(struct net_device ndev)\n--\ndrivers/net/ethernet/atheros/ag71xx.c-1442-\ndrivers/net/ethernet/atheros/ag71xx.c:1443:\tphylink_stop(ag-\u003ephylink);\ndrivers/net/ethernet/atheros/ag71xx.c-1444-\tphylink_disconnect_phy(ag-\u003ephylink);\n--\ndrivers/net/ethernet/atheros/ag71xx.c=1589=static void ag71xx_restart_work_func(struct work_struct work)\n--\ndrivers/net/ethernet/atheros/ag71xx.c-1597-\ndrivers/net/ethernet/atheros/ag71xx.c:1598:\tphylink_stop(ag-\u003ephylink);\ndrivers/net/ethernet/atheros/ag71xx.c-1599-\tphylink_start(ag-\u003ephylink);\n--\ndrivers/net/ethernet/cadence/macb_main.c=3204=static int macb_close(struct net_device netdev)\n--\ndrivers/net/ethernet/cadence/macb_main.c-3220-\ndrivers/net/ethernet/cadence/macb_main.c:3221:\tphylink_stop(bp-\u003ephylink);\ndrivers/net/ethernet/cadence/macb_main.c-3222-\tphylink_disconnect_phy(bp-\u003ephylink);\n--\ndrivers/net/ethernet/cadence/macb_main.c=5096=static int at91ether_close(struct net_device netdev)\n--\ndrivers/net/ethernet/cadence/macb_main.c-5101-\ndrivers/net/ethernet/cadence/macb_main.c:5102:\tphylink_stop(bp-\u003ephylink);\ndrivers/net/ethernet/cadence/macb_main.c-5103-\tphylink_disconnect_phy(bp-\u003ephylink);\n--\ndrivers/net/ethernet/cadence/macb_main.c=6031=static int __maybe_unused macb_suspend(struct device dev)\n--\ndrivers/net/ethernet/cadence/macb_main.c-6124-\t\trtnl_lock();\ndrivers/net/ethernet/cadence/macb_main.c:6125:\t\tphylink_stop(bp-\u003ephylink);\ndrivers/net/ethernet/cadence/macb_main.c-6126-\t\trtnl_unlock();\n--\ndrivers/net/ethernet/cadence/macb_main.c=6146=static int __maybe_unused macb_resume(struct device dev)\n--\ndrivers/net/ethernet/cadence/macb_main.c-6183-\t\trtnl_lock();\ndrivers/net/ethernet/cadence/macb_main.c:6184:\t\tphylink_stop(bp-\u003ephylink);\ndrivers/net/ethernet/cadence/macb_main.c-6185-\t\trtnl_unlock();\n--\ndrivers/net/ethernet/freescale/dpaa/dpaa_eth.c=298=static int dpaa_stop(struct net_device net_dev)\n--\ndrivers/net/ethernet/freescale/dpaa/dpaa_eth.c-313-\ndrivers/net/ethernet/freescale/dpaa/dpaa_eth.c:314:\tphylink_stop(mac_dev-\u003ephylink);\ndrivers/net/ethernet/freescale/dpaa/dpaa_eth.c-315-\tmac_dev-\u003edisable(mac_dev-\u003efman_mac);\n--\ndrivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c=549=void dpaa2_mac_stop(struct dpaa2_mac mac)\n--\ndrivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c-552-\ndrivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c:553:\tphylink_stop(mac-\u003ephylink);\ndrivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c-554-\n--\ndrivers/net/ethernet/freescale/enetc/enetc.c=3093=int enetc_close(struct net_device ndev)\n--\ndrivers/net/ethernet/freescale/enetc/enetc.c-3099-\tif (priv-\u003ephylink) {\ndrivers/net/ethernet/freescale/enetc/enetc.c:3100:\t\tphylink_stop(priv-\u003ephylink);\ndrivers/net/ethernet/freescale/enetc/enetc.c-3101-\t\tphylink_disconnect_phy(priv-\u003ephylink);\n--\ndrivers/net/ethernet/freescale/fs_enet/fs_enet-main.c=583=static void fs_timeout_work(struct work_struct work)\n--\ndrivers/net/ethernet/freescale/fs_enet/fs_enet-main.c-602-\trtnl_lock();\ndrivers/net/ethernet/freescale/fs_enet/fs_enet-main.c:603:\tphylink_stop(fep-\u003ephylink);\ndrivers/net/ethernet/freescale/fs_enet/fs_enet-main.c-604-\tphylink_start(fep-\u003ephylink);\n--\ndrivers/net/ethernet/freescale/fs_enet/fs_enet-main.c=691=static int fs_enet_close(struct net_device dev)\n--\ndrivers/net/ethernet/freescale/fs_enet/fs_enet-main.c-698-\tcancel_work(\u0026fep-\u003etimeout_work);\ndrivers/net/ethernet/freescale/fs_enet/fs_enet-main.c:699:\tphylink_stop(fep-\u003ephylink);\ndrivers/net/ethernet/freescale/fs_enet/fs_enet-main.c-700-\n--\ndrivers/net/ethernet/freescale/ucc_geth.c=1895=static void ucc_geth_stop(struct ucc_geth_private ugeth)\n--\ndrivers/net/ethernet/freescale/ucc_geth.c-1905-\t /\ndrivers/net/ethernet/freescale/ucc_geth.c:1906:\tphylink_stop(ugeth-\u003ephylink);\ndrivers/net/ethernet/freescale/ucc_geth.c-1907-\n--\ndrivers/net/ethernet/marvell/mvneta.c=3796=static void mvneta_stop_dev(struct mvneta_port pp)\n--\ndrivers/net/ethernet/marvell/mvneta.c-3804-\ndrivers/net/ethernet/marvell/mvneta.c:3805:\tphylink_stop(pp-\u003ephylink);\ndrivers/net/ethernet/marvell/mvneta.c-3806-\n--\ndrivers/net/ethernet/marvell/mvpp2/mvpp2_main.c=4648=static void mvpp2_stop_dev(struct mvpp2_port port)\n--\ndrivers/net/ethernet/marvell/mvpp2/mvpp2_main.c-4660-\tif (port-\u003ephylink)\ndrivers/net/ethernet/marvell/mvpp2/mvpp2_main.c:4661:\t\tphylink_stop(port-\u003ephylink);\ndrivers/net/ethernet/marvell/mvpp2/mvpp2_main.c-4662-\tphy_power_off(port-\u003ecomphy);\n--\ndrivers/net/ethernet/marvell/prestera/prestera_main.c=187=static int prestera_port_close(struct net_device dev)\n--\ndrivers/net/ethernet/marvell/prestera/prestera_main.c-195-\tif (port-\u003ephy_link) {\ndrivers/net/ethernet/marvell/prestera/prestera_main.c:196:\t\tphylink_stop(port-\u003ephy_link);\ndrivers/net/ethernet/marvell/prestera/prestera_main.c-197-\t\tphylink_disconnect_phy(port-\u003ephy_link);\n--\ndrivers/net/ethernet/mediatek/mtk_eth_soc.c=3727=static int mtk_stop(struct net_device dev)\n--\ndrivers/net/ethernet/mediatek/mtk_eth_soc.c-3732-\ndrivers/net/ethernet/mediatek/mtk_eth_soc.c:3733:\tphylink_stop(mac-\u003ephylink);\ndrivers/net/ethernet/mediatek/mtk_eth_soc.c-3734-\n--\ndrivers/net/ethernet/microchip/lan743x_main.c=3286=static void lan743x_phylink_disconnect(struct lan743x_adapter adapter)\ndrivers/net/ethernet/microchip/lan743x_main.c-3287-{\ndrivers/net/ethernet/microchip/lan743x_main.c:3288:\tphylink_stop(adapter-\u003ephylink);\ndrivers/net/ethernet/microchip/lan743x_main.c-3289-\tphylink_disconnect_phy(adapter-\u003ephylink);\n--\ndrivers/net/ethernet/microchip/lan966x/lan966x_main.c=197=static int lan966x_port_stop(struct net_device dev)\n--\ndrivers/net/ethernet/microchip/lan966x/lan966x_main.c-201-\tlan966x_port_config_down(port);\ndrivers/net/ethernet/microchip/lan966x/lan966x_main.c:202:\tphylink_stop(port-\u003ephylink);\ndrivers/net/ethernet/microchip/lan966x/lan966x_main.c-203-\tphylink_disconnect_phy(port-\u003ephylink);\n--\ndrivers/net/ethernet/microchip/sparx5/sparx5_netdev.c=105=static int sparx5_port_open(struct net_device ndev)\n--\ndrivers/net/ethernet/microchip/sparx5/sparx5_netdev.c-134-out_power:\ndrivers/net/ethernet/microchip/sparx5/sparx5_netdev.c:135:\tphylink_stop(port-\u003ephylink);\ndrivers/net/ethernet/microchip/sparx5/sparx5_netdev.c-136-\tphylink_disconnect_phy(port-\u003ephylink);\n--\ndrivers/net/ethernet/microchip/sparx5/sparx5_netdev.c=143=static int sparx5_port_stop(struct net_device ndev)\n--\ndrivers/net/ethernet/microchip/sparx5/sparx5_netdev.c-148-\tsparx5_port_enable(port, false);\ndrivers/net/ethernet/microchip/sparx5/sparx5_netdev.c:149:\tphylink_stop(port-\u003ephylink);\ndrivers/net/ethernet/microchip/sparx5/sparx5_netdev.c-150-\tphylink_disconnect_phy(port-\u003ephylink);\n--\ndrivers/net/ethernet/mscc/ocelot_net.c=545=static int ocelot_port_stop(struct net_device dev)\n--\ndrivers/net/ethernet/mscc/ocelot_net.c-548-\ndrivers/net/ethernet/mscc/ocelot_net.c:549:\tphylink_stop(priv-\u003ephylink);\ndrivers/net/ethernet/mscc/ocelot_net.c-550-\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c=4138=static int __stmmac_open(struct net_device dev,\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c-4186-irq_error:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:4187:\tphylink_stop(priv-\u003ephylink);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c-4188-\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c=4248=static void __stmmac_release(struct net_device dev, bool napi_disabled)\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c-4258-\t/ Stop and disconnect the PHY /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:4259:\tphylink_stop(priv-\u003ephylink);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c-4260-\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c=4291=static int stmmac_release(struct net_device dev)\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c-4295-\t/* If the PHY or MAC has WoL enabled, then the PHY will not be\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:4296:\t * suspended when phylink_stop() is called below. Set the PHY\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c-4297-\t * to its slowest speed to save power.\n--\ndrivers/net/ethernet/tehuti/tn40.c=1393=static int tn40_close(struct net_device ndev)\n--\ndrivers/net/ethernet/tehuti/tn40.c-1396-\ndrivers/net/ethernet/tehuti/tn40.c:1397:\tphylink_stop(priv-\u003ephylink);\ndrivers/net/ethernet/tehuti/tn40.c-1398-\tphylink_disconnect_phy(priv-\u003ephylink);\n--\ndrivers/net/ethernet/ti/am65-cpsw-nuss.c=967=static int am65_cpsw_nuss_ndo_slave_stop(struct net_device ndev)\n--\ndrivers/net/ethernet/ti/am65-cpsw-nuss.c-972-\ndrivers/net/ethernet/ti/am65-cpsw-nuss.c:973:\tphylink_stop(port-\u003eslave.phylink);\ndrivers/net/ethernet/ti/am65-cpsw-nuss.c-974-\n--\ndrivers/net/ethernet/wangxun/ngbe/ngbe_main.c=50=static void ngbe_down_suspend(struct wx wx)\n--\ndrivers/net/ethernet/wangxun/ngbe/ngbe_main.c-54-\ndrivers/net/ethernet/wangxun/ngbe/ngbe_main.c:55:\tphylink_stop(wx-\u003ephylink);\ndrivers/net/ethernet/wangxun/ngbe/ngbe_main.c-56-\tphylink_disconnect_phy(wx-\u003ephylink);\n--\ndrivers/net/ethernet/wangxun/ngbe/ngbe_main.c=442=void ngbe_down(struct wx wx)\ndrivers/net/ethernet/wangxun/ngbe/ngbe_main.c-443-{\ndrivers/net/ethernet/wangxun/ngbe/ngbe_main.c:444:\tphylink_stop(wx-\u003ephylink);\ndrivers/net/ethernet/wangxun/ngbe/ngbe_main.c-445-\tngbe_disable_device(wx);\n--\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c=287=void txgbe_down(struct wx wx)\n--\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c-293-\tcase wx_mac_aml40:\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c:294:\t\tphylink_stop(wx-\u003ephylink);\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c-295-\t\tbreak;\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c-296-\tcase wx_mac_aml:\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c:297:\t\tphylink_stop(wx-\u003ephylink);\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c-298-\t\t/ Disable TX laser /\n--\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c-301-\tcase wx_mac_sp:\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c:302:\t\tphylink_stop(wx-\u003ephylink);\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c-303-\t\tbreak;\n--\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c=319=static void txgbe_down_suspend(struct wx wx)\n--\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c-323-\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c:324:\tphylink_stop(wx-\u003ephylink);\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c-325-\twx_clean_all_tx_rings(wx);\n--\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c=1661=static int axienet_open(struct net_device ndev)\n--\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c-1710-\tcancel_delayed_work_sync(\u0026lp-\u003estats_work);\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c:1711:\tphylink_stop(lp-\u003ephylink);\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c-1712-\tphylink_disconnect_phy(lp-\u003ephylink);\n--\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c=1726=static int axienet_stop(struct net_device ndev)\n--\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c-1741-\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c:1742:\tphylink_stop(lp-\u003ephylink);\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c-1743-\tphylink_disconnect_phy(lp-\u003ephylink);\n--\ndrivers/net/phy/phylink.c=2485=EXPORT_SYMBOL_GPL(phylink_start);\n--\ndrivers/net/phy/phylink.c-2487-/*\ndrivers/net/phy/phylink.c:2488: phylink_stop() - stop a phylink instance\ndrivers/net/phy/phylink.c-2489- * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\n--\ndrivers/net/phy/phylink.c-2500- /\ndrivers/net/phy/phylink.c:2501:void phylink_stop(struct phylink pl)\ndrivers/net/phy/phylink.c-2502-{\n--\ndrivers/net/phy/phylink.c=2606=static bool phylink_phy_pm_speed_ctrl(struct phylink pl)\n--\ndrivers/net/phy/phylink.c-2619- - If Wake-on-Lan is not active, we can bring down the link between\ndrivers/net/phy/phylink.c:2620: * the MAC and PHY by calling phylink_stop().\ndrivers/net/phy/phylink.c-2621- * - If Wake-on-Lan is active, and being handled only by the PHY, we\n--\ndrivers/net/phy/phylink.c=2629=void phylink_suspend(struct phylink pl, bool mac_wol)\n--\ndrivers/net/phy/phylink.c-2658-\t} else {\ndrivers/net/phy/phylink.c:2659:\t\tphylink_stop(pl);\ndrivers/net/phy/phylink.c-2660-\t}\n--\ndrivers/net/phy/phylink.c=4385=EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state);\n--\ndrivers/net/phy/phylink.c-4395- \ndrivers/net/phy/phylink.c:4396: * This is similar to phylink_stop(), except it does not alter the state of\ndrivers/net/phy/phylink.c-4397- * the phylib PHY (it is assumed that it is not affected by the MAC destructive\n--\ndrivers/net/usb/asix_devices.c=946=static int ax88772_stop(struct usbnet dev)\n--\ndrivers/net/usb/asix_devices.c-949-\ndrivers/net/usb/asix_devices.c:950:\tphylink_stop(priv-\u003ephylink);\ndrivers/net/usb/asix_devices.c-951-\n--\ndrivers/net/usb/lan78xx.c=3538=static int lan78xx_stop(struct net_device net)\n--\ndrivers/net/usb/lan78xx.c-3558-\ndrivers/net/usb/lan78xx.c:3559:\tphylink_stop(dev-\u003ephylink);\ndrivers/net/usb/lan78xx.c-3560-\n--\ndrivers/net/usb/lan78xx.c=4571=static void lan78xx_disconnect(struct usb_interface intf)\n--\ndrivers/net/usb/lan78xx.c-4583-\trtnl_lock();\ndrivers/net/usb/lan78xx.c:4584:\tphylink_stop(dev-\u003ephylink);\ndrivers/net/usb/lan78xx.c-4585-\tphylink_disconnect_phy(dev-\u003ephylink);\n--\ninclude/linux/phylink.h=743=void phylink_start(struct phylink );\ninclude/linux/phylink.h:744:void phylink_stop(struct phylink );\ninclude/linux/phylink.h-745-\n--\nnet/dsa/port.c=245=void dsa_port_disable_rt(struct dsa_port dp)\n--\nnet/dsa/port.c-250-\tif (dp-\u003epl)\nnet/dsa/port.c:251:\t\tphylink_stop(dp-\u003epl);\nnet/dsa/port.c-252-\n--\nnet/dsa/user.c=2726=int dsa_user_suspend(struct net_device *user_dev)\n--\nnet/dsa/user.c-2735-\trtnl_lock();\nnet/dsa/user.c:2736:\tphylink_stop(dp-\u003epl);\nnet/dsa/user.c-2737-\trtnl_unlock();\n" }
7/2	2026/09/23 16:27	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 19377 output: 31 thoughts: 285 Thoughts: USB Network Devices and Phylink: A Fuzzing Opportunity Okay, check this out! I'm seeing `asix_devices.c` and `lan78xx.c` in the code, and it's hitting me – USB net devices are leveraging phylink. That's a key observation. Then, the gears start turning: if USB net devices like `asix` and `lan78xx` are using phylink, then they could be emulated through USB Raw Gadget and therefore be perfect targets for syzkaller USB fuzzing! This opens up a whole new area to explore! And wait a second, this isn’t limited to just those two; this likely extends to DSA (Distributed Switch Architecture) devices and other network devices. The possibilities are expanding quickly. Now, I'm going to take a deeper dive. Let's start with `drivers/net/usb/asix_devices.c`. I see `ax88772_stop` calls `phylink_stop(priv->phylink);`. And then, `lan78xx`, that USB network adapter from Microchip, in `lan78xx.c`: `lan78xx_stop` calls `phylink_stop(dev->phylink)`. It's consistent. But, back to syzkaller... Does syzkaller offer the tools? I know it has USB emulation functions like `syz_usb_connect`, but can it actually connect these USB Ethernet devices like `lan78xx` or `asix`? Does it have the capability to interact with phylink through the USB emulation? I need to know for sure. I have to figure out if it can do that. Hold on, I need to understand this patch in context. Time to analyze it carefully, see what problem it was solving, and what the implications of the fix were. I also need to read the git log for the commit, or the repository in general, to get more context on this and to see if the vulnerability is reproducible.
8/2	2026/09/23 16:27	tool	grepper	0m Args: { "Expression": ".", "PathPrefix": "drivers/net/phy/phylink.c" } Results:* { "Output": "\nFull output is too long, showing 500 out of 4450 lines.\nUse more precise expression if possible.\n\ndrivers/net/phy/phylink.c:1:// SPDX-License-Identifier: GPL-2.0\ndrivers/net/phy/phylink.c:2:/\ndrivers/net/phy/phylink.c:3: phylink models the MAC to optional PHY connection, supporting\ndrivers/net/phy/phylink.c:4: * technologies such as SFP cages where the PHY is hot-pluggable.\ndrivers/net/phy/phylink.c:5: \ndrivers/net/phy/phylink.c:6: Copyright (C) 2015 Russell King\ndrivers/net/phy/phylink.c:7: /\ndrivers/net/phy/phylink.c:8:#include \u003clinux/acpi.h\u003e\ndrivers/net/phy/phylink.c:9:#include \u003clinux/ethtool.h\u003e\ndrivers/net/phy/phylink.c:10:#include \u003clinux/export.h\u003e\ndrivers/net/phy/phylink.c:11:#include \u003clinux/gpio/consumer.h\u003e\ndrivers/net/phy/phylink.c:12:#include \u003clinux/netdevice.h\u003e\ndrivers/net/phy/phylink.c:13:#include \u003clinux/of.h\u003e\ndrivers/net/phy/phylink.c:14:#include \u003clinux/of_mdio.h\u003e\ndrivers/net/phy/phylink.c:15:#include \u003clinux/phy.h\u003e\ndrivers/net/phy/phylink.c:16:#include \u003clinux/phy_fixed.h\u003e\ndrivers/net/phy/phylink.c:17:#include \u003clinux/phylink.h\u003e\ndrivers/net/phy/phylink.c:18:#include \u003clinux/rtnetlink.h\u003e\ndrivers/net/phy/phylink.c:19:#include \u003clinux/spinlock.h\u003e\ndrivers/net/phy/phylink.c:20:#include \u003clinux/timer.h\u003e\ndrivers/net/phy/phylink.c:21:#include \u003clinux/workqueue.h\u003e\ndrivers/net/phy/phylink.c:22:\ndrivers/net/phy/phylink.c:23:#include \"phy-caps.h\"\ndrivers/net/phy/phylink.c:24:#include \"sfp.h\"\ndrivers/net/phy/phylink.c:25:#include \"swphy.h\"\ndrivers/net/phy/phylink.c:26:\ndrivers/net/phy/phylink.c:27:enum {\ndrivers/net/phy/phylink.c:28:\tPHYLINK_DISABLE_STOPPED,\ndrivers/net/phy/phylink.c:29:\tPHYLINK_DISABLE_LINK,\ndrivers/net/phy/phylink.c:30:\tPHYLINK_DISABLE_MAC_WOL,\ndrivers/net/phy/phylink.c:31:\tPHYLINK_DISABLE_REPLAY,\ndrivers/net/phy/phylink.c:32:\ndrivers/net/phy/phylink.c:33:\tPCS_STATE_DOWN = 0,\ndrivers/net/phy/phylink.c:34:\tPCS_STATE_STARTING,\ndrivers/net/phy/phylink.c:35:\tPCS_STATE_STARTED,\ndrivers/net/phy/phylink.c:36:};\ndrivers/net/phy/phylink.c:37:\ndrivers/net/phy/phylink.c:38:/\ndrivers/net/phy/phylink.c:39: struct phylink - internal data type for phylink\ndrivers/net/phy/phylink.c:40: /\ndrivers/net/phy/phylink.c:41:struct phylink {\ndrivers/net/phy/phylink.c:42:\t/ private: /\ndrivers/net/phy/phylink.c:43:\tstruct net_device netdev;\ndrivers/net/phy/phylink.c:44:\tconst struct phylink_mac_ops mac_ops;\ndrivers/net/phy/phylink.c:45:\tstruct phylink_config config;\ndrivers/net/phy/phylink.c:46:\tstruct phylink_pcs pcs;\ndrivers/net/phy/phylink.c:47:\tstruct device dev;\ndrivers/net/phy/phylink.c:48:\tunsigned int old_link_state:1;\ndrivers/net/phy/phylink.c:49:\ndrivers/net/phy/phylink.c:50:\tunsigned long phylink_disable_state; /* bitmask of disables /\ndrivers/net/phy/phylink.c:51:\tstruct phy_device phydev;\ndrivers/net/phy/phylink.c:52:\tphy_interface_t link_interface;\t/* PHY_INTERFACE_xxx /\ndrivers/net/phy/phylink.c:53:\tu8 cfg_link_an_mode;\t\t/ MLO_AN_xxx /\ndrivers/net/phy/phylink.c:54:\tu8 req_link_an_mode;\t\t/ Requested MLO_AN_xxx mode /\ndrivers/net/phy/phylink.c:55:\tu8 act_link_an_mode;\t\t/ Active MLO_AN_xxx mode /\ndrivers/net/phy/phylink.c:56:\tu8 link_port;\t\t\t/ The current non-phy ethtool port /\ndrivers/net/phy/phylink.c:57:\t__ETHTOOL_DECLARE_LINK_MODE_MASK(supported);\ndrivers/net/phy/phylink.c:58:\t__ETHTOOL_DECLARE_LINK_MODE_MASK(supported_lpi);\ndrivers/net/phy/phylink.c:59:\ndrivers/net/phy/phylink.c:60:\t/ The link configuration settings /\ndrivers/net/phy/phylink.c:61:\tstruct phylink_link_state link_config;\ndrivers/net/phy/phylink.c:62:\ndrivers/net/phy/phylink.c:63:\t/ The current settings /\ndrivers/net/phy/phylink.c:64:\tphy_interface_t cur_interface;\ndrivers/net/phy/phylink.c:65:\ndrivers/net/phy/phylink.c:66:\tstruct gpio_desc link_gpio;\ndrivers/net/phy/phylink.c:67:\tunsigned int link_irq;\ndrivers/net/phy/phylink.c:68:\tstruct timer_list link_poll;\ndrivers/net/phy/phylink.c:69:\ndrivers/net/phy/phylink.c:70:\tstruct mutex state_mutex;\ndrivers/net/phy/phylink.c:71:\t/* Serialize updates to pl-\u003ephydev with phylink_resolve() /\ndrivers/net/phy/phylink.c:72:\tstruct mutex phydev_mutex;\ndrivers/net/phy/phylink.c:73:\tstruct phylink_link_state phy_state;\ndrivers/net/phy/phylink.c:74:\tunsigned int phy_ib_mode;\ndrivers/net/phy/phylink.c:75:\tstruct work_struct resolve;\ndrivers/net/phy/phylink.c:76:\tunsigned int pcs_neg_mode;\ndrivers/net/phy/phylink.c:77:\tunsigned int pcs_state;\ndrivers/net/phy/phylink.c:78:\ndrivers/net/phy/phylink.c:79:\tbool link_failed;\ndrivers/net/phy/phylink.c:80:\tbool suspend_link_up;\ndrivers/net/phy/phylink.c:81:\tbool force_major_config;\ndrivers/net/phy/phylink.c:82:\tbool major_config_failed;\ndrivers/net/phy/phylink.c:83:\tbool mac_supports_eee_ops;\ndrivers/net/phy/phylink.c:84:\tbool mac_supports_eee;\ndrivers/net/phy/phylink.c:85:\tbool phy_enable_tx_lpi;\ndrivers/net/phy/phylink.c:86:\tbool mac_enable_tx_lpi;\ndrivers/net/phy/phylink.c:87:\tbool mac_tx_clk_stop;\ndrivers/net/phy/phylink.c:88:\tu32 mac_tx_lpi_timer;\ndrivers/net/phy/phylink.c:89:\tu8 mac_rx_clk_stop_blocked;\ndrivers/net/phy/phylink.c:90:\ndrivers/net/phy/phylink.c:91:\tstruct sfp_bus sfp_bus;\ndrivers/net/phy/phylink.c:92:\tbool sfp_may_have_phy;\ndrivers/net/phy/phylink.c:93:\tDECLARE_PHY_INTERFACE_MASK(sfp_interfaces);\ndrivers/net/phy/phylink.c:94:\t__ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support);\ndrivers/net/phy/phylink.c:95:\tu8 sfp_port;\ndrivers/net/phy/phylink.c:96:\ndrivers/net/phy/phylink.c:97:\tstruct eee_config eee_cfg;\ndrivers/net/phy/phylink.c:98:\ndrivers/net/phy/phylink.c:99:\tu32 wolopts_mac;\ndrivers/net/phy/phylink.c:100:\tu8 wol_sopass[SOPASS_MAX];\ndrivers/net/phy/phylink.c:101:};\ndrivers/net/phy/phylink.c:102:\ndrivers/net/phy/phylink.c:103:#define phylink_printk(level, pl, fmt, ...) \\\ndrivers/net/phy/phylink.c:104:\tdo { \\\ndrivers/net/phy/phylink.c:105:\t\tif ((pl)-\u003econfig-\u003etype == PHYLINK_NETDEV) \\\ndrivers/net/phy/phylink.c:106:\t\t\tnetdev_printk(level, (pl)-\u003enetdev, fmt, ##__VA_ARGS__); \\\ndrivers/net/phy/phylink.c:107:\t\telse if ((pl)-\u003econfig-\u003etype == PHYLINK_DEV) \\\ndrivers/net/phy/phylink.c:108:\t\t\tdev_printk(level, (pl)-\u003edev, fmt, ##__VA_ARGS__); \\\ndrivers/net/phy/phylink.c:109:\t} while (0)\ndrivers/net/phy/phylink.c:110:\ndrivers/net/phy/phylink.c:111:#define phylink_err(pl, fmt, ...) \\\ndrivers/net/phy/phylink.c:112:\tphylink_printk(KERN_ERR, pl, fmt, ##__VA_ARGS__)\ndrivers/net/phy/phylink.c:113:#define phylink_warn(pl, fmt, ...) \\\ndrivers/net/phy/phylink.c:114:\tphylink_printk(KERN_WARNING, pl, fmt, ##__VA_ARGS__)\ndrivers/net/phy/phylink.c:115:#define phylink_info(pl, fmt, ...) \\\ndrivers/net/phy/phylink.c:116:\tphylink_printk(KERN_INFO, pl, fmt, ##__VA_ARGS__)\ndrivers/net/phy/phylink.c:117:#if defined(CONFIG_DYNAMIC_DEBUG)\ndrivers/net/phy/phylink.c:118:#define phylink_dbg(pl, fmt, ...) \\\ndrivers/net/phy/phylink.c:119:do {\t\t\t\t\t\t\t\t\t\\\ndrivers/net/phy/phylink.c:120:\tif ((pl)-\u003econfig-\u003etype == PHYLINK_NETDEV)\t\t\t\\\ndrivers/net/phy/phylink.c:121:\t\tnetdev_dbg((pl)-\u003enetdev, fmt, ##__VA_ARGS__);\t\t\\\ndrivers/net/phy/phylink.c:122:\telse if ((pl)-\u003econfig-\u003etype == PHYLINK_DEV)\t\t\t\\\ndrivers/net/phy/phylink.c:123:\t\tdev_dbg((pl)-\u003edev, fmt, ##__VA_ARGS__);\t\t\t\\\ndrivers/net/phy/phylink.c:124:} while (0)\ndrivers/net/phy/phylink.c:125:#elif defined(DEBUG)\ndrivers/net/phy/phylink.c:126:#define phylink_dbg(pl, fmt, ...)\t\t\t\t\t\\\ndrivers/net/phy/phylink.c:127:\tphylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__)\ndrivers/net/phy/phylink.c:128:#else\ndrivers/net/phy/phylink.c:129:#define phylink_dbg(pl, fmt, ...)\t\t\t\t\t\\\ndrivers/net/phy/phylink.c:130:({\t\t\t\t\t\t\t\t\t\\\ndrivers/net/phy/phylink.c:131:\tif (0)\t\t\t\t\t\t\t\t\\\ndrivers/net/phy/phylink.c:132:\t\tphylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__);\t\\\ndrivers/net/phy/phylink.c:133:})\ndrivers/net/phy/phylink.c:134:#endif\ndrivers/net/phy/phylink.c:135:\ndrivers/net/phy/phylink.c:136:static const phy_interface_t phylink_sfp_interface_preference[] = {\ndrivers/net/phy/phylink.c:137:\tPHY_INTERFACE_MODE_100GBASEP,\ndrivers/net/phy/phylink.c:138:\tPHY_INTERFACE_MODE_50GBASER,\ndrivers/net/phy/phylink.c:139:\tPHY_INTERFACE_MODE_LAUI,\ndrivers/net/phy/phylink.c:140:\tPHY_INTERFACE_MODE_25GBASER,\ndrivers/net/phy/phylink.c:141:\tPHY_INTERFACE_MODE_USXGMII,\ndrivers/net/phy/phylink.c:142:\tPHY_INTERFACE_MODE_10GBASER,\ndrivers/net/phy/phylink.c:143:\tPHY_INTERFACE_MODE_5GBASER,\ndrivers/net/phy/phylink.c:144:\tPHY_INTERFACE_MODE_2500BASEX,\ndrivers/net/phy/phylink.c:145:\tPHY_INTERFACE_MODE_SGMII,\ndrivers/net/phy/phylink.c:146:\tPHY_INTERFACE_MODE_1000BASEX,\ndrivers/net/phy/phylink.c:147:\tPHY_INTERFACE_MODE_100BASEX,\ndrivers/net/phy/phylink.c:148:};\ndrivers/net/phy/phylink.c:149:\ndrivers/net/phy/phylink.c:150:static DECLARE_PHY_INTERFACE_MASK(phylink_sfp_interfaces);\ndrivers/net/phy/phylink.c:151:\ndrivers/net/phy/phylink.c:152:/*\ndrivers/net/phy/phylink.c:153: phylink_set_port_modes() - set the port type modes in the ethtool mask\ndrivers/net/phy/phylink.c:154: * @mask: ethtool link mode mask\ndrivers/net/phy/phylink.c:155: \ndrivers/net/phy/phylink.c:156: Sets all the port type modes in the ethtool mask.\ndrivers/net/phy/phylink.c:157: /\ndrivers/net/phy/phylink.c:158:void phylink_set_port_modes(unsigned long mask)\ndrivers/net/phy/phylink.c:159:{\ndrivers/net/phy/phylink.c:160:\tphylink_set(mask, TP);\ndrivers/net/phy/phylink.c:161:\tphylink_set(mask, AUI);\ndrivers/net/phy/phylink.c:162:\tphylink_set(mask, MII);\ndrivers/net/phy/phylink.c:163:\tphylink_set(mask, FIBRE);\ndrivers/net/phy/phylink.c:164:\tphylink_set(mask, BNC);\ndrivers/net/phy/phylink.c:165:\tphylink_set(mask, Backplane);\ndrivers/net/phy/phylink.c:166:}\ndrivers/net/phy/phylink.c:167:EXPORT_SYMBOL_GPL(phylink_set_port_modes);\ndrivers/net/phy/phylink.c:168:\ndrivers/net/phy/phylink.c:169:static int phylink_is_empty_linkmode(const unsigned long linkmode)\ndrivers/net/phy/phylink.c:170:{\ndrivers/net/phy/phylink.c:171:\t__ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, };\ndrivers/net/phy/phylink.c:172:\ndrivers/net/phy/phylink.c:173:\tphylink_set_port_modes(tmp);\ndrivers/net/phy/phylink.c:174:\tphylink_set(tmp, Autoneg);\ndrivers/net/phy/phylink.c:175:\tphylink_set(tmp, Pause);\ndrivers/net/phy/phylink.c:176:\tphylink_set(tmp, Asym_Pause);\ndrivers/net/phy/phylink.c:177:\ndrivers/net/phy/phylink.c:178:\treturn linkmode_subset(linkmode, tmp);\ndrivers/net/phy/phylink.c:179:}\ndrivers/net/phy/phylink.c:180:\ndrivers/net/phy/phylink.c:181:static const char phylink_an_mode_str(unsigned int mode)\ndrivers/net/phy/phylink.c:182:{\ndrivers/net/phy/phylink.c:183:\tstatic const char modestr[] = {\ndrivers/net/phy/phylink.c:184:\t\t[MLO_AN_PHY] = \"phy\",\ndrivers/net/phy/phylink.c:185:\t\t[MLO_AN_FIXED] = \"fixed\",\ndrivers/net/phy/phylink.c:186:\t\t[MLO_AN_INBAND] = \"inband\",\ndrivers/net/phy/phylink.c:187:\t};\ndrivers/net/phy/phylink.c:188:\ndrivers/net/phy/phylink.c:189:\treturn mode \u003c ARRAY_SIZE(modestr) ? modestr[mode] : \"unknown\";\ndrivers/net/phy/phylink.c:190:}\ndrivers/net/phy/phylink.c:191:\ndrivers/net/phy/phylink.c:192:static const char phylink_pcs_mode_str(unsigned int mode)\ndrivers/net/phy/phylink.c:193:{\ndrivers/net/phy/phylink.c:194:\tif (!mode)\ndrivers/net/phy/phylink.c:195:\t\treturn \"none\";\ndrivers/net/phy/phylink.c:196:\ndrivers/net/phy/phylink.c:197:\tif (mode \u0026 PHYLINK_PCS_NEG_OUTBAND)\ndrivers/net/phy/phylink.c:198:\t\treturn \"outband\";\ndrivers/net/phy/phylink.c:199:\ndrivers/net/phy/phylink.c:200:\tif (mode \u0026 PHYLINK_PCS_NEG_INBAND) {\ndrivers/net/phy/phylink.c:201:\t\tif (mode \u0026 PHYLINK_PCS_NEG_ENABLED)\ndrivers/net/phy/phylink.c:202:\t\t\treturn \"inband,an-enabled\";\ndrivers/net/phy/phylink.c:203:\t\telse\ndrivers/net/phy/phylink.c:204:\t\t\treturn \"inband,an-disabled\";\ndrivers/net/phy/phylink.c:205:\t}\ndrivers/net/phy/phylink.c:206:\ndrivers/net/phy/phylink.c:207:\treturn \"unknown\";\ndrivers/net/phy/phylink.c:208:}\ndrivers/net/phy/phylink.c:209:\ndrivers/net/phy/phylink.c:210:static unsigned int phylink_interface_signal_rate(phy_interface_t interface)\ndrivers/net/phy/phylink.c:211:{\ndrivers/net/phy/phylink.c:212:\tswitch (interface) {\ndrivers/net/phy/phylink.c:213:\tcase PHY_INTERFACE_MODE_SGMII:\ndrivers/net/phy/phylink.c:214:\tcase PHY_INTERFACE_MODE_1000BASEX: /* 1.25Mbd /\ndrivers/net/phy/phylink.c:215:\t\treturn 1250;\ndrivers/net/phy/phylink.c:216:\tcase PHY_INTERFACE_MODE_2500BASEX: / 3.125Mbd /\ndrivers/net/phy/phylink.c:217:\t\treturn 3125;\ndrivers/net/phy/phylink.c:218:\tcase PHY_INTERFACE_MODE_5GBASER: / 5.15625Mbd /\ndrivers/net/phy/phylink.c:219:\t\treturn 5156;\ndrivers/net/phy/phylink.c:220:\tcase PHY_INTERFACE_MODE_10GBASER: / 10.3125Mbd /\ndrivers/net/phy/phylink.c:221:\t\treturn 10313;\ndrivers/net/phy/phylink.c:222:\tdefault:\ndrivers/net/phy/phylink.c:223:\t\treturn 0;\ndrivers/net/phy/phylink.c:224:\t}\ndrivers/net/phy/phylink.c:225:}\ndrivers/net/phy/phylink.c:226:\ndrivers/net/phy/phylink.c:227:/\ndrivers/net/phy/phylink.c:228: phylink_interface_max_speed() - get the maximum speed of a phy interface\ndrivers/net/phy/phylink.c:229: * @interface: phy interface mode defined by \u0026typedef phy_interface_t\ndrivers/net/phy/phylink.c:230: \ndrivers/net/phy/phylink.c:231: Determine the maximum speed of a phy interface. This is intended to help\ndrivers/net/phy/phylink.c:232: * determine the correct speed to pass to the MAC when the phy is performing\ndrivers/net/phy/phylink.c:233: * rate matching.\ndrivers/net/phy/phylink.c:234: \ndrivers/net/phy/phylink.c:235: Return: The maximum speed of @interface\ndrivers/net/phy/phylink.c:236: /\ndrivers/net/phy/phylink.c:237:static int phylink_interface_max_speed(phy_interface_t interface)\ndrivers/net/phy/phylink.c:238:{\ndrivers/net/phy/phylink.c:239:\tswitch (interface) {\ndrivers/net/phy/phylink.c:240:\tcase PHY_INTERFACE_MODE_100BASEX:\ndrivers/net/phy/phylink.c:241:\tcase PHY_INTERFACE_MODE_REVRMII:\ndrivers/net/phy/phylink.c:242:\tcase PHY_INTERFACE_MODE_RMII:\ndrivers/net/phy/phylink.c:243:\tcase PHY_INTERFACE_MODE_SMII:\ndrivers/net/phy/phylink.c:244:\tcase PHY_INTERFACE_MODE_REVMII:\ndrivers/net/phy/phylink.c:245:\tcase PHY_INTERFACE_MODE_MII:\ndrivers/net/phy/phylink.c:246:\tcase PHY_INTERFACE_MODE_MIILITE:\ndrivers/net/phy/phylink.c:247:\t\treturn SPEED_100;\ndrivers/net/phy/phylink.c:248:\ndrivers/net/phy/phylink.c:249:\tcase PHY_INTERFACE_MODE_TBI:\ndrivers/net/phy/phylink.c:250:\tcase PHY_INTERFACE_MODE_MOCA:\ndrivers/net/phy/phylink.c:251:\tcase PHY_INTERFACE_MODE_RTBI:\ndrivers/net/phy/phylink.c:252:\tcase PHY_INTERFACE_MODE_1000BASEX:\ndrivers/net/phy/phylink.c:253:\tcase PHY_INTERFACE_MODE_1000BASEKX:\ndrivers/net/phy/phylink.c:254:\tcase PHY_INTERFACE_MODE_TRGMII:\ndrivers/net/phy/phylink.c:255:\tcase PHY_INTERFACE_MODE_RGMII_TXID:\ndrivers/net/phy/phylink.c:256:\tcase PHY_INTERFACE_MODE_RGMII_RXID:\ndrivers/net/phy/phylink.c:257:\tcase PHY_INTERFACE_MODE_RGMII_ID:\ndrivers/net/phy/phylink.c:258:\tcase PHY_INTERFACE_MODE_RGMII:\ndrivers/net/phy/phylink.c:259:\tcase PHY_INTERFACE_MODE_PSGMII:\ndrivers/net/phy/phylink.c:260:\tcase PHY_INTERFACE_MODE_QSGMII:\ndrivers/net/phy/phylink.c:261:\tcase PHY_INTERFACE_MODE_QUSGMII:\ndrivers/net/phy/phylink.c:262:\tcase PHY_INTERFACE_MODE_SGMII:\ndrivers/net/phy/phylink.c:263:\tcase PHY_INTERFACE_MODE_GMII:\ndrivers/net/phy/phylink.c:264:\t\treturn SPEED_1000;\ndrivers/net/phy/phylink.c:265:\ndrivers/net/phy/phylink.c:266:\tcase PHY_INTERFACE_MODE_2500BASEX:\ndrivers/net/phy/phylink.c:267:\tcase PHY_INTERFACE_MODE_10G_QXGMII:\ndrivers/net/phy/phylink.c:268:\t\treturn SPEED_2500;\ndrivers/net/phy/phylink.c:269:\ndrivers/net/phy/phylink.c:270:\tcase PHY_INTERFACE_MODE_5GBASER:\ndrivers/net/phy/phylink.c:271:\t\treturn SPEED_5000;\ndrivers/net/phy/phylink.c:272:\ndrivers/net/phy/phylink.c:273:\tcase PHY_INTERFACE_MODE_XGMII:\ndrivers/net/phy/phylink.c:274:\tcase PHY_INTERFACE_MODE_RXAUI:\ndrivers/net/phy/phylink.c:275:\tcase PHY_INTERFACE_MODE_XAUI:\ndrivers/net/phy/phylink.c:276:\tcase PHY_INTERFACE_MODE_10GBASER:\ndrivers/net/phy/phylink.c:277:\tcase PHY_INTERFACE_MODE_10GKR:\ndrivers/net/phy/phylink.c:278:\tcase PHY_INTERFACE_MODE_USXGMII:\ndrivers/net/phy/phylink.c:279:\t\treturn SPEED_10000;\ndrivers/net/phy/phylink.c:280:\ndrivers/net/phy/phylink.c:281:\tcase PHY_INTERFACE_MODE_25GBASER:\ndrivers/net/phy/phylink.c:282:\t\treturn SPEED_25000;\ndrivers/net/phy/phylink.c:283:\ndrivers/net/phy/phylink.c:284:\tcase PHY_INTERFACE_MODE_XLGMII:\ndrivers/net/phy/phylink.c:285:\t\treturn SPEED_40000;\ndrivers/net/phy/phylink.c:286:\ndrivers/net/phy/phylink.c:287:\tcase PHY_INTERFACE_MODE_50GBASER:\ndrivers/net/phy/phylink.c:288:\tcase PHY_INTERFACE_MODE_LAUI:\ndrivers/net/phy/phylink.c:289:\t\treturn SPEED_50000;\ndrivers/net/phy/phylink.c:290:\ndrivers/net/phy/phylink.c:291:\tcase PHY_INTERFACE_MODE_100GBASEP:\ndrivers/net/phy/phylink.c:292:\t\treturn SPEED_100000;\ndrivers/net/phy/phylink.c:293:\ndrivers/net/phy/phylink.c:294:\tcase PHY_INTERFACE_MODE_INTERNAL:\ndrivers/net/phy/phylink.c:295:\tcase PHY_INTERFACE_MODE_NA:\ndrivers/net/phy/phylink.c:296:\tcase PHY_INTERFACE_MODE_MAX:\ndrivers/net/phy/phylink.c:297:\t\t/ No idea! Garbage in, unknown out /\ndrivers/net/phy/phylink.c:298:\t\treturn SPEED_UNKNOWN;\ndrivers/net/phy/phylink.c:299:\t}\ndrivers/net/phy/phylink.c:300:\ndrivers/net/phy/phylink.c:301:\t/ If we get here, someone forgot to add an interface mode above /\ndrivers/net/phy/phylink.c:302:\tWARN_ON_ONCE(1);\ndrivers/net/phy/phylink.c:303:\treturn SPEED_UNKNOWN;\ndrivers/net/phy/phylink.c:304:}\ndrivers/net/phy/phylink.c:305:\ndrivers/net/phy/phylink.c:306:static struct {\ndrivers/net/phy/phylink.c:307:\tunsigned long mask;\ndrivers/net/phy/phylink.c:308:\tint speed;\ndrivers/net/phy/phylink.c:309:\tunsigned int duplex;\ndrivers/net/phy/phylink.c:310:\tunsigned int caps_bit;\ndrivers/net/phy/phylink.c:311:} phylink_caps_params[] = {\ndrivers/net/phy/phylink.c:312:\t{ MAC_400000FD, SPEED_400000, DUPLEX_FULL, BIT(LINK_CAPA_400000FD) },\ndrivers/net/phy/phylink.c:313:\t{ MAC_200000FD, SPEED_200000, DUPLEX_FULL, BIT(LINK_CAPA_200000FD) },\ndrivers/net/phy/phylink.c:314:\t{ MAC_100000FD, SPEED_100000, DUPLEX_FULL, BIT(LINK_CAPA_100000FD) },\ndrivers/net/phy/phylink.c:315:\t{ MAC_80000FD, SPEED_80000, DUPLEX_FULL, BIT(LINK_CAPA_80000FD) },\ndrivers/net/phy/phylink.c:316:\t{ MAC_56000FD, SPEED_56000, DUPLEX_FULL, BIT(LINK_CAPA_56000FD) },\ndrivers/net/phy/phylink.c:317:\t{ MAC_50000FD, SPEED_50000, DUPLEX_FULL, BIT(LINK_CAPA_50000FD) },\ndrivers/net/phy/phylink.c:318:\t{ MAC_40000FD, SPEED_40000, DUPLEX_FULL, BIT(LINK_CAPA_40000FD) },\ndrivers/net/phy/phylink.c:319:\t{ MAC_25000FD, SPEED_25000, DUPLEX_FULL, BIT(LINK_CAPA_25000FD) },\ndrivers/net/phy/phylink.c:320:\t{ MAC_20000FD, SPEED_20000, DUPLEX_FULL, BIT(LINK_CAPA_20000FD) },\ndrivers/net/phy/phylink.c:321:\t{ MAC_10000FD, SPEED_10000, DUPLEX_FULL, BIT(LINK_CAPA_10000FD) },\ndrivers/net/phy/phylink.c:322:\t{ MAC_5000FD, SPEED_5000, DUPLEX_FULL, BIT(LINK_CAPA_5000FD) },\ndrivers/net/phy/phylink.c:323:\t{ MAC_2500FD, SPEED_2500, DUPLEX_FULL, BIT(LINK_CAPA_2500FD) },\ndrivers/net/phy/phylink.c:324:\t{ MAC_1000FD, SPEED_1000, DUPLEX_FULL, BIT(LINK_CAPA_1000FD) },\ndrivers/net/phy/phylink.c:325:\t{ MAC_1000HD, SPEED_1000, DUPLEX_HALF, BIT(LINK_CAPA_1000HD) },\ndrivers/net/phy/phylink.c:326:\t{ MAC_100FD, SPEED_100, DUPLEX_FULL, BIT(LINK_CAPA_100FD) },\ndrivers/net/phy/phylink.c:327:\t{ MAC_100HD, SPEED_100, DUPLEX_HALF, BIT(LINK_CAPA_100HD) },\ndrivers/net/phy/phylink.c:328:\t{ MAC_10FD, SPEED_10, DUPLEX_FULL, BIT(LINK_CAPA_10FD) },\ndrivers/net/phy/phylink.c:329:\t{ MAC_10HD, SPEED_10, DUPLEX_HALF, BIT(LINK_CAPA_10HD) },\ndrivers/net/phy/phylink.c:330:};\ndrivers/net/phy/phylink.c:331:\ndrivers/net/phy/phylink.c:332:/\ndrivers/net/phy/phylink.c:333: phylink_caps_to_link_caps() - Convert a set of MAC capabilities LINK caps\ndrivers/net/phy/phylink.c:334: * @caps: A set of MAC capabilities\ndrivers/net/phy/phylink.c:335: \ndrivers/net/phy/phylink.c:336: Returns: The corresponding set of LINK_CAPA as defined in phy-caps.h\ndrivers/net/phy/phylink.c:337: /\ndrivers/net/phy/phylink.c:338:static unsigned long phylink_caps_to_link_caps(unsigned long caps)\ndrivers/net/phy/phylink.c:339:{\ndrivers/net/phy/phylink.c:340:\tunsigned long link_caps = 0;\ndrivers/net/phy/phylink.c:341:\tint i;\ndrivers/net/phy/phylink.c:342:\ndrivers/net/phy/phylink.c:343:\tfor (i = 0; i \u003c ARRAY_SIZE(phylink_caps_params); i++)\ndrivers/net/phy/phylink.c:344:\t\tif (caps \u0026 phylink_caps_params[i].mask)\ndrivers/net/phy/phylink.c:345:\t\t\tlink_caps \|= phylink_caps_params[i].caps_bit;\ndrivers/net/phy/phylink.c:346:\ndrivers/net/phy/phylink.c:347:\treturn link_caps;\ndrivers/net/phy/phylink.c:348:}\ndrivers/net/phy/phylink.c:349:\ndrivers/net/phy/phylink.c:350:static unsigned long phylink_link_caps_to_mac_caps(unsigned long link_caps)\ndrivers/net/phy/phylink.c:351:{\ndrivers/net/phy/phylink.c:352:\tunsigned long caps = 0;\ndrivers/net/phy/phylink.c:353:\tint i;\ndrivers/net/phy/phylink.c:354:\ndrivers/net/phy/phylink.c:355:\tfor (i = 0; i \u003c ARRAY_SIZE(phylink_caps_params); i++)\ndrivers/net/phy/phylink.c:356:\t\tif (link_caps \u0026 phylink_caps_params[i].caps_bit)\ndrivers/net/phy/phylink.c:357:\t\t\tcaps \|= phylink_caps_params[i].mask;\ndrivers/net/phy/phylink.c:358:\ndrivers/net/phy/phylink.c:359:\treturn caps;\ndrivers/net/phy/phylink.c:360:}\ndrivers/net/phy/phylink.c:361:\ndrivers/net/phy/phylink.c:362:/\ndrivers/net/phy/phylink.c:363: phylink_caps_to_linkmodes() - Convert capabilities to ethtool link modes\ndrivers/net/phy/phylink.c:364: * @linkmodes: ethtool linkmode mask (must be already initialised)\ndrivers/net/phy/phylink.c:365: * @caps: bitmask of MAC capabilities\ndrivers/net/phy/phylink.c:366: \ndrivers/net/phy/phylink.c:367: Set all possible pause, speed and duplex linkmodes in @linkmodes that are\ndrivers/net/phy/phylink.c:368: * supported by the @caps. @linkmodes must have been initialised previously.\ndrivers/net/phy/phylink.c:369: /\ndrivers/net/phy/phylink.c:370:static void phylink_caps_to_linkmodes(unsigned long linkmodes,\ndrivers/net/phy/phylink.c:371:\t\t\t\t unsigned long caps)\ndrivers/net/phy/phylink.c:372:{\ndrivers/net/phy/phylink.c:373:\tunsigned long link_caps = phylink_caps_to_link_caps(caps);\ndrivers/net/phy/phylink.c:374:\ndrivers/net/phy/phylink.c:375:\tif (caps \u0026 MAC_SYM_PAUSE)\ndrivers/net/phy/phylink.c:376:\t\t__set_bit(ETHTOOL_LINK_MODE_Pause_BIT, linkmodes);\ndrivers/net/phy/phylink.c:377:\ndrivers/net/phy/phylink.c:378:\tif (caps \u0026 MAC_ASYM_PAUSE)\ndrivers/net/phy/phylink.c:379:\t\t__set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, linkmodes);\ndrivers/net/phy/phylink.c:380:\ndrivers/net/phy/phylink.c:381:\tphy_caps_linkmodes(link_caps, linkmodes);\ndrivers/net/phy/phylink.c:382:}\ndrivers/net/phy/phylink.c:383:\ndrivers/net/phy/phylink.c:384:/*\ndrivers/net/phy/phylink.c:385: phylink_limit_mac_speed - limit the phylink_config to a maximum speed\ndrivers/net/phy/phylink.c:386: * @config: pointer to a \u0026struct phylink_config\ndrivers/net/phy/phylink.c:387: * @max_speed: maximum speed\ndrivers/net/phy/phylink.c:388: \ndrivers/net/phy/phylink.c:389: Mask off MAC capabilities for speeds higher than the @max_speed parameter.\ndrivers/net/phy/phylink.c:390: * Any further motifications of config.mac_capabilities will override this.\ndrivers/net/phy/phylink.c:391: /\ndrivers/net/phy/phylink.c:392:void phylink_limit_mac_speed(struct phylink_config config, u32 max_speed)\ndrivers/net/phy/phylink.c:393:{\ndrivers/net/phy/phylink.c:394:\tint i;\ndrivers/net/phy/phylink.c:395:\ndrivers/net/phy/phylink.c:396:\tfor (i = 0; i \u003c ARRAY_SIZE(phylink_caps_params) \u0026\u0026\ndrivers/net/phy/phylink.c:397:\t\t phylink_caps_params[i].speed \u003e max_speed; i++)\ndrivers/net/phy/phylink.c:398:\t\tconfig-\u003emac_capabilities \u0026= ~phylink_caps_params[i].mask;\ndrivers/net/phy/phylink.c:399:}\ndrivers/net/phy/phylink.c:400:EXPORT_SYMBOL_GPL(phylink_limit_mac_speed);\ndrivers/net/phy/phylink.c:401:\ndrivers/net/phy/phylink.c:402:/*\ndrivers/net/phy/phylink.c:403: phylink_cap_from_speed_duplex - Get mac capability from speed/duplex\ndrivers/net/phy/phylink.c:404: * @speed: the speed to search for\ndrivers/net/phy/phylink.c:405: * @duplex: the duplex to search for\ndrivers/net/phy/phylink.c:406: \ndrivers/net/phy/phylink.c:407: Find the mac capability for a given speed and duplex.\ndrivers/net/phy/phylink.c:408: \ndrivers/net/phy/phylink.c:409: Return: A mask with the mac capability patching @speed and @duplex, or 0 if\ndrivers/net/phy/phylink.c:410: * there were no matches.\ndrivers/net/phy/phylink.c:411: /\ndrivers/net/phy/phylink.c:412:static unsigned long phylink_cap_from_speed_duplex(int speed,\ndrivers/net/phy/phylink.c:413:\t\t\t\t\t\t unsigned int duplex)\ndrivers/net/phy/phylink.c:414:{\ndrivers/net/phy/phylink.c:415:\tint i;\ndrivers/net/phy/phylink.c:416:\ndrivers/net/phy/phylink.c:417:\tfor (i = 0; i \u003c ARRAY_SIZE(phylink_caps_params); i++) {\ndrivers/net/phy/phylink.c:418:\t\tif (speed == phylink_caps_params[i].speed \u0026\u0026\ndrivers/net/phy/phylink.c:419:\t\t duplex == phylink_caps_params[i].duplex)\ndrivers/net/phy/phylink.c:420:\t\t\treturn phylink_caps_params[i].mask;\ndrivers/net/phy/phylink.c:421:\t}\ndrivers/net/phy/phylink.c:422:\ndrivers/net/phy/phylink.c:423:\treturn 0;\ndrivers/net/phy/phylink.c:424:}\ndrivers/net/phy/phylink.c:425:\ndrivers/net/phy/phylink.c:426:/\ndrivers/net/phy/phylink.c:427: phylink_get_capabilities() - get capabilities for a given MAC\ndrivers/net/phy/phylink.c:428: * @interface: phy interface mode defined by \u0026typedef phy_interface_t\ndrivers/net/phy/phylink.c:429: * @mac_capabilities: bitmask of MAC capabilities\ndrivers/net/phy/phylink.c:430: * @rate_matching: type of rate matching being performed\ndrivers/net/phy/phylink.c:431: \ndrivers/net/phy/phylink.c:432: Get the MAC capabilities that are supported by the @interface mode and\ndrivers/net/phy/phylink.c:433: * @mac_capabilities.\ndrivers/net/phy/phylink.c:434: /\ndrivers/net/phy/phylink.c:435:static unsigned long phylink_get_capabilities(phy_interface_t interface,\ndrivers/net/phy/phylink.c:436:\t\t\t\t\t unsigned long mac_capabilities,\ndrivers/net/phy/phylink.c:437:\t\t\t\t\t int rate_matching)\ndrivers/net/phy/phylink.c:438:{\ndrivers/net/phy/phylink.c:439:\tunsigned long link_caps = phy_caps_from_interface(interface);\ndrivers/net/phy/phylink.c:440:\tint max_speed = phylink_interface_max_speed(interface);\ndrivers/net/phy/phylink.c:441:\tunsigned long caps = MAC_SYM_PAUSE \| MAC_ASYM_PAUSE;\ndrivers/net/phy/phylink.c:442:\tunsigned long matched_caps = 0;\ndrivers/net/phy/phylink.c:443:\ndrivers/net/phy/phylink.c:444:\tcaps \|= phylink_link_caps_to_mac_caps(link_caps);\ndrivers/net/phy/phylink.c:445:\ndrivers/net/phy/phylink.c:446:\tswitch (rate_matching) {\ndrivers/net/phy/phylink.c:447:\tcase RATE_MATCH_OPEN_LOOP:\ndrivers/net/phy/phylink.c:448:\t\t/ TODO /\ndrivers/net/phy/phylink.c:449:\t\tfallthrough;\ndrivers/net/phy/phylink.c:450:\tcase RATE_MATCH_NONE:\ndrivers/net/phy/phylink.c:451:\t\tmatched_caps = 0;\ndrivers/net/phy/phylink.c:452:\t\tbreak;\ndrivers/net/phy/phylink.c:453:\tcase RATE_MATCH_PAUSE: {\ndrivers/net/phy/phylink.c:454:\t\t/ The MAC must support asymmetric pause towards the local\ndrivers/net/phy/phylink.c:455:\t\t * device for this. We could allow just symmetric pause, but\ndrivers/net/phy/phylink.c:456:\t\t * then we might have to renegotiate if the link partner\ndrivers/net/phy/phylink.c:457:\t\t * doesn't support pause. This is because there's no way to\ndrivers/net/phy/phylink.c:458:\t\t * accept pause frames without transmitting them if we only\ndrivers/net/phy/phylink.c:459:\t\t * support symmetric pause.\ndrivers/net/phy/phylink.c:460:\t\t /\ndrivers/net/phy/phylink.c:461:\t\tif (!(mac_capabilities \u0026 MAC_SYM_PAUSE) \|\|\ndrivers/net/phy/phylink.c:462:\t\t !(mac_capabilities \u0026 MAC_ASYM_PAUSE))\ndrivers/net/phy/phylink.c:463:\t\t\tbreak;\ndrivers/net/phy/phylink.c:464:\ndrivers/net/phy/phylink.c:465:\t\t/ We can't adapt if the MAC doesn't support the interface's\ndrivers/net/phy/phylink.c:466:\t\t * max speed at full duplex.\ndrivers/net/phy/phylink.c:467:\t\t /\ndrivers/net/phy/phylink.c:468:\t\tif (mac_capabilities \u0026\ndrivers/net/phy/phylink.c:469:\t\t phylink_cap_from_speed_duplex(max_speed, DUPLEX_FULL))\ndrivers/net/phy/phylink.c:470:\t\t\tmatched_caps = GENMASK(__fls(caps), __fls(MAC_10HD));\ndrivers/net/phy/phylink.c:471:\t\tbreak;\ndrivers/net/phy/phylink.c:472:\t}\ndrivers/net/phy/phylink.c:473:\tcase RATE_MATCH_CRS:\ndrivers/net/phy/phylink.c:474:\t\t/ The MAC must support half duplex at the interface's max\ndrivers/net/phy/phylink.c:475:\t\t * speed.\ndrivers/net/phy/phylink.c:476:\t\t /\ndrivers/net/phy/phylink.c:477:\t\tif (mac_capabilities \u0026\ndrivers/net/phy/phylink.c:478:\t\t phylink_cap_from_speed_duplex(max_speed, DUPLEX_HALF)) {\ndrivers/net/phy/phylink.c:479:\t\t\tmatched_caps = GENMASK(__fls(caps), __fls(MAC_10HD));\ndrivers/net/phy/phylink.c:480:\t\t\tmatched_caps \u0026= mac_capabilities;\ndrivers/net/phy/phylink.c:481:\t\t}\ndrivers/net/phy/phylink.c:482:\t\tbreak;\ndrivers/net/phy/phylink.c:483:\t}\ndrivers/net/phy/phylink.c:484:\ndrivers/net/phy/phylink.c:485:\treturn (caps \u0026 mac_capabilities) \| matched_caps;\ndrivers/net/phy/phylink.c:486:}\ndrivers/net/phy/phylink.c:487:\ndrivers/net/phy/phylink.c:488:/\ndrivers/net/phy/phylink.c:489: phylink_validate_mask_caps() - Restrict link modes based on caps\ndrivers/net/phy/phylink.c:490: * @supported: ethtool bitmask for supported link modes.\ndrivers/net/phy/phylink.c:491: * @state: pointer to a \u0026struct phylink_link_state.\ndrivers/net/phy/phylink.c:492: * @mac_capabilities: bitmask of MAC capabilities\ndrivers/net/phy/phylink.c:493: \ndrivers/net/phy/phylink.c:494: Calculate the supported link modes based on @mac_capabilities, and restrict\ndrivers/net/phy/phylink.c:495: * @supported and @state based on that. Use this function if your capabiliies\ndrivers/net/phy/phylink.c:496: * aren't constant, such as if they vary depending on the interface.\ndrivers/net/phy/phylink.c:497: /\ndrivers/net/phy/phylink.c:498:static void phylink_validate_mask_caps(unsigned long supported,\ndrivers/net/phy/phylink.c:499:\t\t\t\t struct phylink_link_state *state,\ndrivers/net/phy/phylink.c:500:\t\t\t\t unsigned long mac_capabilities)\n\n" }
9/2	2026/09/23 16:27	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 33096 output: 39 thoughts: 2114 Thoughts: Analyzing the STMMAC Driver's State Transitions Okay, let's break this down. First, I see a new boolean variable `priv->opened` introduced in `stmmac.h`. This likely represents the open/close state of the STMMAC device. The diff shows that `__stmmac_open()` sets `priv->opened = true`, and `__stmmac_release()` sets it to `false`. These functions are paired and serialized by RTNL, which makes sense. I see the addition in both `stmmac_main.c` and a few related modifications: * The `__stmmac_release` function now takes an additional `napi_disabled` parameter. This looks like a conditional path, indicating that there are instances where NAPI is not disabled during release. * The `stmmac_resume` function now has an `error_stop_dma` label and a specific teardown path. The `__stmmac_release` is now called with `napi_disabled = true`. This is important, as the normal path already tears down the data path. * It looks like there's an additional check `if (!priv->opened)` in `__stmmac_release` to prevent double-teardown. This is likely handling cases where there is an MTU change failure in `stmmac_change_mtu`. * In `stmmac_change_mtu`, the interface is released (`__stmmac_release`) before an attempt to re-open it. If the reopen fails, there's a specific cleanup path, including a `netif_close(dev)` call, and the previously done release is not repeated. * The `phylink_stop` function now has a condition to avoid stopping a link if it has already been stopped, using `PHYLINK_DISABLE_STOPPED`. `phylink_suspend` looks like it handles the case. * There's also a new `PHYLINK_DISABLE_MAC_WOL` bit being used, in relation to `phylink_stop`. It looks like the driver is trying to be more robust, especially when it comes to MTU changes, resume/suspend scenarios, and handling PHY link states. The introduction of `priv->opened` is a crucial addition to track the open/close state more explicitly, and the conditional `napi_disabled` argument to `__stmmac_release` handles the scenarios where NAPI should not be disabled. The extra checks and conditional logic are to ensure that the driver does not try to tear down resources more than once and ensures the PHY is properly disconnected.
10/2	2026/09/23 16:27	tool	read-file	0m Args: { "File": "drivers/net/phy/phylink.c", "FirstLine": 2490, "LineCount": 50 } Results: { "Contents": "2490:\t \n2491:\t Stop the phylink instance specified by @pl. This should be called from the\n2492:\t * network device driver's \u0026struct net_device_ops ndo_stop() method. The\n2493:\t * network device's carrier state should not be changed prior to calling this\n2494:\t * function.\n2495:\t \n2496:\t This will synchronously bring down the link if the link is not already\n2497:\t * down (in other words, it will trigger a mac_link_down() method call.)\n2498:\t * It may also be called after phylink_suspend() if the MAC cannot resume\n2499:\t * and the network device must be closed instead.\n2500:\t /\n2501:\tvoid phylink_stop(struct phylink pl)\n2502:\t{\n2503:\t\tASSERT_RTNL();\n2504:\t\n2505:\t\t/* phylink_suspend() already stops the link without MAC WoL. /\n2506:\t\tif (test_bit(PHYLINK_DISABLE_STOPPED, \u0026pl-\u003ephylink_disable_state))\n2507:\t\t\treturn;\n2508:\t\n2509:\t\tif (pl-\u003esfp_bus)\n2510:\t\t\tsfp_upstream_stop(pl-\u003esfp_bus);\n2511:\t\tif (pl-\u003ephydev)\n2512:\t\t\tphy_stop(pl-\u003ephydev);\n2513:\t\ttimer_delete_sync(\u0026pl-\u003elink_poll);\n2514:\t\tif (pl-\u003elink_irq) {\n2515:\t\t\tfree_irq(pl-\u003elink_irq, pl);\n2516:\t\t\tpl-\u003elink_irq = 0;\n2517:\t\t}\n2518:\t\n2519:\t\tphylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED);\n2520:\t\n2521:\t\tif (test_bit(PHYLINK_DISABLE_MAC_WOL, \u0026pl-\u003ephylink_disable_state)) {\n2522:\t\t\t/ Finish the link-down deferred by MAC WoL, without restarting. /\n2523:\t\t\tflush_work(\u0026pl-\u003eresolve);\n2524:\t\t\tmutex_lock(\u0026pl-\u003estate_mutex);\n2525:\t\t\tif (pl-\u003esuspend_link_up)\n2526:\t\t\t\tphylink_link_down(pl);\n2527:\t\t\t__clear_bit(PHYLINK_DISABLE_MAC_WOL, \u0026pl-\u003ephylink_disable_state);\n2528:\t\t\tmutex_unlock(\u0026pl-\u003estate_mutex);\n2529:\t\t}\n2530:\t\n2531:\t\tpl-\u003epcs_state = PCS_STATE_DOWN;\n2532:\t\n2533:\t\tphylink_pcs_disable(pl-\u003epcs);\n2534:\t}\n2535:\tEXPORT_SYMBOL_GPL(phylink_stop);\n2536:\t\n2537:\t/\n2538:\t phylink_rx_clk_stop_block() - block PHY ability to stop receive clock in LPI\n2539:\t * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\n" }
11/2	2026/09/23 16:27	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 36678 output: 39 thoughts: 27 Thoughts: Okay, here's my take on those thoughts, tailored for an expert audience: Investigating a Potential Network Link Suspension Issue Alright, so we're seeing something funky with network link suspension. My gut feeling is that it's likely a lower-level hardware interaction or a timing issue. To dig deeper, I want to take a look at `phylink_suspend` in `phylink.c`. Specifically, around line 2629. That's usually where the PHY (Physical Layer) interaction with the link state management happens. I want to scrutinize how the link is put in/out of the suspend state, considering potential race conditions or incorrect signaling from the PHY. I’m thinking there might be something subtle lurking there, so I'll probably step through the code execution in a debugger from that point. Let's see if we can find some clues.
12/2	2026/09/23 16:27	tool	read-file	0m Args: { "File": "drivers/net/phy/phylink.c", "FirstLine": 2625, "LineCount": 45 } Results: { "Contents": "2625:\t \n2626:\t Note: when phylink managed Wake-on-Lan is in use, @mac_wol is ignored.\n2627:\t * (struct phylink_mac_ops.mac_set_wol populated.)\n2628:\t /\n2629:\tvoid phylink_suspend(struct phylink pl, bool mac_wol)\n2630:\t{\n2631:\t\tASSERT_RTNL();\n2632:\t\n2633:\t\tif (phylink_mac_supports_wol(pl))\n2634:\t\t\tmac_wol = !!pl-\u003ewolopts_mac;\n2635:\t\n2636:\t\tif (mac_wol \u0026\u0026 (!pl-\u003enetdev \|\| pl-\u003enetdev-\u003eethtool-\u003ewol_enabled)) {\n2637:\t\t\t/* Wake-on-Lan enabled, MAC handling /\n2638:\t\t\tmutex_lock(\u0026pl-\u003estate_mutex);\n2639:\t\n2640:\t\t\t/ Stop the resolver bringing the link up /\n2641:\t\t\t__set_bit(PHYLINK_DISABLE_MAC_WOL, \u0026pl-\u003ephylink_disable_state);\n2642:\t\n2643:\t\t\tpl-\u003esuspend_link_up = phylink_link_is_up(pl);\n2644:\t\t\tif (pl-\u003esuspend_link_up) {\n2645:\t\t\t\t/ Disable the carrier, to prevent transmit timeouts,\n2646:\t\t\t\t * but one would hope all packets have been sent. This\n2647:\t\t\t\t * also means phylink_resolve() will do nothing.\n2648:\t\t\t\t /\n2649:\t\t\t\tif (pl-\u003enetdev)\n2650:\t\t\t\t\tnetif_carrier_off(pl-\u003enetdev);\n2651:\t\t\t\tpl-\u003eold_link_state = false;\n2652:\t\t\t}\n2653:\t\n2654:\t\t\t/ We do not call mac_link_down() here as we want the\n2655:\t\t\t * link to remain up to receive the WoL packets.\n2656:\t\t\t /\n2657:\t\t\tmutex_unlock(\u0026pl-\u003estate_mutex);\n2658:\t\t} else {\n2659:\t\t\tphylink_stop(pl);\n2660:\t\t}\n2661:\t\n2662:\t\tif (phylink_phy_pm_speed_ctrl(pl))\n2663:\t\t\tphylink_speed_down(pl, false);\n2664:\t}\n2665:\tEXPORT_SYMBOL_GPL(phylink_suspend);\n2666:\t\n2667:\t/\n2668:\t phylink_prepare_resume() - prepare to resume a network device\n2669:\t * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\n" }
13/2	2026/09/23 16:27	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 37654 output: 42 thoughts: 369 Thoughts: Analyzing the phylink suspend/stop sequence Okay, so I'm digging into the `phylink` driver and looking at how it handles suspend and stop operations. My focus is on the interplay between `phylink_suspend` and `phylink_stop`. I see that within `phylink_suspend`, if MAC Wake-on-LAN isn't enabled (`mac_wol` is false), the code calls `phylink_stop(pl)`. This function then calls `phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED);`, which sets the `PHYLINK_DISABLE_STOPPED` bit. Now, the interesting bit. If `phylink_stop(pl)` is called again, it checks if `PHYLINK_DISABLE_STOPPED` is already set and just returns if it is. This is a crucial optimization to avoid redundant link downs. However, if MAC WoL was active during the suspend operation, a different bit, `PHYLINK_DISABLE_MAC_WOL`, is set. Then `phylink_stop` does something else. It looks like it is handling the link-down deferred by MAC WoL. It flushes the `resolve` workqueue, locks the `state_mutex`, and if the link was up before suspend, calls `phylink_link_down(pl)`, clearing the `PHYLINK_DISABLE_MAC_WOL` bit, and unlocks. This prevents the link from being restarted. Hang on a sec, the conditional logic here seems a bit involved. I need to review the original patch to fully understand the rationale behind it. Let me just check the git log to make sure I am on the right track.
14/2	2026/09/23 16:27	tool	grepper	0m Args: { "Expression": ".", "PathPrefix": "drivers/net/ethernet/stmicro/stmmac/stmmac_main.c" } Results:* { "Output": "\nFull output is too long, showing 500 out of 8478 lines.\nUse more precise expression if possible.\n\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:1:// SPDX-License-Identifier: GPL-2.0-only\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:2:/*****************************************************************************\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:3: This is the driver for the ST MAC 10/100/1000 on-chip Ethernet controllers.\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:4: ST Ethernet IPs are built around a Synopsys IP Core.\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:5:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:6:\tCopyright(C) 2007-2011 STMicroelectronics Ltd\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:7:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:8:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:9: Author: Giuseppe Cavallaro \u003cpeppe.cavallaro@st.com\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:10:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:11: Documentation available at:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:12:\thttp://www.stlinux.com\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:13: Support available at:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:14:\thttps://bugzilla.stlinux.com/\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:15:****************************************************************************/\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:16:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:17:#include \u003clinux/circ_buf.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:18:#include \u003clinux/clk.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:19:#include \u003clinux/kernel.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:20:#include \u003clinux/interrupt.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:21:#include \u003clinux/ip.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:22:#include \u003clinux/tcp.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:23:#include \u003clinux/skbuff.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:24:#include \u003clinux/ethtool.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:25:#include \u003clinux/if_ether.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:26:#include \u003clinux/crc32.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:27:#include \u003clinux/mii.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:28:#include \u003clinux/if.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:29:#include \u003clinux/if_vlan.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:30:#include \u003clinux/dma-mapping.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:31:#include \u003clinux/slab.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:32:#include \u003clinux/pm_runtime.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:33:#include \u003clinux/pm_wakeirq.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:34:#include \u003clinux/prefetch.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:35:#include \u003clinux/pinctrl/consumer.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:36:#ifdef CONFIG_DEBUG_FS\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:37:#include \u003clinux/debugfs.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:38:#include \u003clinux/seq_file.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:39:#endif / CONFIG_DEBUG_FS /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:40:#include \u003clinux/net_tstamp.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:41:#include \u003clinux/phylink.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:42:#include \u003clinux/udp.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:43:#include \u003clinux/bpf_trace.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:44:#include \u003cnet/devlink.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:45:#include \u003cnet/page_pool/helpers.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:46:#include \u003cnet/pkt_cls.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:47:#include \u003cnet/xdp_sock_drv.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:48:#include \"stmmac_ptp.h\"\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:49:#include \"stmmac_fpe.h\"\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:50:#include \"stmmac.h\"\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:51:#include \"stmmac_pcs.h\"\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:52:#include \"stmmac_xdp.h\"\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:53:#include \u003clinux/reset.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:54:#include \u003clinux/of_mdio.h\u003e\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:55:#include \"dwmac1000.h\"\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:56:#include \"dwxgmac2.h\"\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:57:#include \"hwif.h\"\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:58:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:59:/ As long as the interface is active, we keep the timestamping counter enabled\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:60: * with fine resolution and binary rollover. This avoid non-monotonic behavior\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:61: * (clock jumps) when changing timestamping settings at runtime.\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:62: /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:63:#define STMMAC_HWTS_ACTIVE\t(PTP_TCR_TSENA \| PTP_TCR_TSCTRLSSR)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:64:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:65:#define\tSTMMAC_ALIGN(x)\t\tALIGN(ALIGN(x, SMP_CACHE_BYTES), 16)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:66:#define\tTSO_MAX_BUFF_SIZE\t(SZ_16K - 1)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:67:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:68:/ Module parameters /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:69:#define TX_TIMEO\t5000\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:70:static int watchdog = TX_TIMEO;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:71:module_param(watchdog, int, 0644);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:72:MODULE_PARM_DESC(watchdog, \"Transmit timeout in milliseconds (default 5s)\");\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:73:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:74:static int debug = -1;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:75:module_param(debug, int, 0644);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:76:MODULE_PARM_DESC(debug, \"Message Level (-1: default, 0: no output, 16: all)\");\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:77:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:78:static int phyaddr = -1;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:79:module_param(phyaddr, int, 0444);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:80:MODULE_PARM_DESC(phyaddr, \"Physical device address\");\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:81:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:82:#define STMMAC_TX_THRESH(x)\t((x)-\u003edma_conf.dma_tx_size / 4)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:83:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:84:/ Limit to make sure XDP TX and slow path can coexist /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:85:#define STMMAC_XSK_TX_BUDGET_MAX\t256\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:86:#define STMMAC_TX_XSK_AVAIL\t\t16\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:87:#define STMMAC_RX_FILL_BATCH\t\t16\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:88:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:89:#define STMMAC_XDP_PASS\t\t0\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:90:#define STMMAC_XDP_CONSUMED\tBIT(0)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:91:#define STMMAC_XDP_TX\t\tBIT(1)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:92:#define STMMAC_XDP_REDIRECT\tBIT(2)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:93:#define STMMAC_XSK_CONSUMED\tBIT(3)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:94:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:95:static int flow_ctrl = 0xdead;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:96:module_param(flow_ctrl, int, 0644);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:97:MODULE_PARM_DESC(flow_ctrl, \"Flow control ability [on/off] (obsolete)\");\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:98:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:99:static int pause = PAUSE_TIME;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:100:module_param(pause, int, 0644);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:101:MODULE_PARM_DESC(pause, \"Flow Control Pause Time (units of 512 bit times)\");\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:102:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:103:#define TC_DEFAULT 64\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:104:static int tc = TC_DEFAULT;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:105:module_param(tc, int, 0644);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:106:MODULE_PARM_DESC(tc, \"DMA threshold control value\");\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:107:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:108:/ This is unused /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:109:#define\tDEFAULT_BUFSIZE\t1536\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:110:static int buf_sz = DEFAULT_BUFSIZE;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:111:module_param(buf_sz, int, 0644);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:112:MODULE_PARM_DESC(buf_sz, \"DMA buffer size\");\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:113:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:114:static const u32 default_msg_level = (NETIF_MSG_DRV \| NETIF_MSG_PROBE \|\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:115:\t\t\t\t NETIF_MSG_LINK \| NETIF_MSG_IFUP \|\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:116:\t\t\t\t NETIF_MSG_IFDOWN \| NETIF_MSG_TIMER);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:117:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:118:#define STMMAC_DEFAULT_LPI_TIMER\t1000\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:119:static unsigned int eee_timer = STMMAC_DEFAULT_LPI_TIMER;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:120:module_param(eee_timer, uint, 0644);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:121:MODULE_PARM_DESC(eee_timer, \"LPI tx expiration time in msec\");\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:122:#define STMMAC_LPI_T(x) (jiffies + usecs_to_jiffies(x))\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:123:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:124:/ By default the driver will use the ring mode to manage tx and rx descriptors,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:125: * but allow user to force to use the chain instead of the ring\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:126: /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:127:static unsigned int chain_mode;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:128:module_param(chain_mode, int, 0444);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:129:MODULE_PARM_DESC(chain_mode, \"To use chain instead of ring mode\");\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:130:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:131:static const char stmmac_dwmac_actphyif[8] = {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:132:\t[PHY_INTF_SEL_GMII_MII]\t= \"GMII/MII\",\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:133:\t[PHY_INTF_SEL_RGMII]\t= \"RGMII\",\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:134:\t[PHY_INTF_SEL_SGMII]\t= \"SGMII\",\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:135:\t[PHY_INTF_SEL_TBI]\t= \"TBI\",\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:136:\t[PHY_INTF_SEL_RMII]\t= \"RMII\",\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:137:\t[PHY_INTF_SEL_RTBI]\t= \"RTBI\",\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:138:\t[PHY_INTF_SEL_SMII]\t= \"SMII\",\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:139:\t[PHY_INTF_SEL_REVMII]\t= \"REVMII\",\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:140:};\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:141:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:142:static const char stmmac_dwxgmac_phyif[4] = {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:143:\t[PHY_INTF_GMII]\t\t= \"GMII\",\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:144:\t[PHY_INTF_RGMII]\t= \"RGMII\",\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:145:};\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:146:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:147:static irqreturn_t stmmac_interrupt(int irq, void dev_id);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:148:/* For MSI interrupts handling /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:149:static irqreturn_t stmmac_mac_interrupt(int irq, void dev_id);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:150:static irqreturn_t stmmac_safety_interrupt(int irq, void dev_id);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:151:static irqreturn_t stmmac_msi_intr_tx(int irq, void data);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:152:static irqreturn_t stmmac_msi_intr_rx(int irq, void data);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:153:static void stmmac_reset_rx_queue(struct stmmac_priv priv, u32 queue);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:154:static void stmmac_reset_tx_queue(struct stmmac_priv priv, u32 queue);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:155:static void stmmac_reset_queues_param(struct stmmac_priv priv);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:156:static void stmmac_tx_timer_arm(struct stmmac_priv priv, u32 queue);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:157:static void stmmac_flush_tx_descriptors(struct stmmac_priv priv, int queue);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:158:static void stmmac_set_dma_operation_mode(struct stmmac_priv priv, u32 txmode,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:159:\t\t\t\t\t u32 rxmode, u32 chan);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:160:static void stmmac_vlan_restore(struct stmmac_priv priv);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:161:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:162:#ifdef CONFIG_DEBUG_FS\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:163:static const struct net_device_ops stmmac_netdev_ops;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:164:static void stmmac_init_fs(struct net_device dev);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:165:static void stmmac_exit_fs(struct net_device dev);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:166:#endif\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:167:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:168:#define STMMAC_COAL_TIMER(x) (ns_to_ktime((x) * NSEC_PER_USEC))\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:169:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:170:struct stmmac_devlink_priv {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:171:\tstruct stmmac_priv stmmac_priv;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:172:};\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:173:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:174:enum stmmac_dl_param_id {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:175:\tSTMMAC_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:176:\tSTMMAC_DEVLINK_PARAM_ID_TS_COARSE,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:177:};\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:178:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:179:/\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:180: stmmac_set_clk_tx_rate() - set the clock rate for the MAC transmit clock\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:181: * @bsp_priv: BSP private data structure (unused)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:182: * @clk_tx_i: the transmit clock\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:183: * @interface: the selected interface mode\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:184: * @speed: the speed that the MAC will be operating at\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:185: \ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:186: Set the transmit clock rate for the MAC, normally 2.5MHz for 10Mbps,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:187: * 25MHz for 100Mbps and 125MHz for 1Gbps. This is suitable for at least\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:188: * MII, GMII, RGMII and RMII interface modes. Platforms can hook this into\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:189: * the plat_data-\u003eset_clk_tx_rate method directly, call it via their own\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:190: * implementation, or implement their own method should they have more\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:191: * complex requirements. It is intended to only be used in this method.\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:192: \ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:193: plat_data-\u003eclk_tx_i must be filled in.\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:194: /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:195:int stmmac_set_clk_tx_rate(void bsp_priv, struct clk clk_tx_i,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:196:\t\t\t phy_interface_t interface, int speed)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:197:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:198:\tlong rate = rgmii_clock(speed);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:199:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:200:\t/ Silently ignore unsupported speeds as rgmii_clock() only\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:201:\t * supports 10, 100 and 1000Mbps. We do not want to spit\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:202:\t * errors for 2500 and higher speeds here.\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:203:\t /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:204:\tif (rate \u003c 0)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:205:\t\treturn 0;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:206:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:207:\treturn clk_set_rate(clk_tx_i, rate);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:208:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:209:EXPORT_SYMBOL_GPL(stmmac_set_clk_tx_rate);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:210:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:211:/\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:212: stmmac_axi_blen_to_mask() - convert a burst length array to reg value\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:213: * @regval: pointer to a u32 for the resulting register value\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:214: * @blen: pointer to an array of u32 containing the burst length values in bytes\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:215: * @len: the number of entries in the @blen array\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:216: /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:217:void stmmac_axi_blen_to_mask(u32 regval, const u32 blen, size_t len)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:218:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:219:\tsize_t i;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:220:\tu32 val;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:221:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:222:\tfor (val = i = 0; i \u003c len; i++) {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:223:\t\tu32 burst = blen[i];\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:224:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:225:\t\t/ Burst values of zero must be skipped. /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:226:\t\tif (!burst)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:227:\t\t\tcontinue;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:228:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:229:\t\t/ The valid range for the burst length is 4 to 256 inclusive,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:230:\t\t * and it must be a power of two.\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:231:\t\t /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:232:\t\tif (burst \u003c 4 \|\| burst \u003e 256 \|\| !is_power_of_2(burst)) {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:233:\t\t\tpr_err(\"stmmac: invalid burst length %u at index %zu\\n\",\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:234:\t\t\t burst, i);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:235:\t\t\tcontinue;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:236:\t\t}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:237:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:238:\t\t/ Since burst is a power of two, and the register field starts\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:239:\t\t * with burst = 4, shift right by two bits so bit 0 of the field\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:240:\t\t * corresponds with the minimum value.\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:241:\t\t /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:242:\t\tval \|= burst \u003e\u003e 2;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:243:\t}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:244:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:245:\tregval = FIELD_PREP(DMA_AXI_BLEN_MASK, val);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:246:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:247:EXPORT_SYMBOL_GPL(stmmac_axi_blen_to_mask);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:248:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:249:/*\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:250: stmmac_verify_args - verify the driver parameters.\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:251: * Description: it checks the driver parameters and set a default in case of\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:252: * errors.\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:253: /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:254:static void stmmac_verify_args(void)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:255:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:256:\tif (unlikely(watchdog \u003c 0))\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:257:\t\twatchdog = TX_TIMEO;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:258:\tif (unlikely((pause \u003c 0) \|\| (pause \u003e 0xffff)))\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:259:\t\tpause = PAUSE_TIME;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:260:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:261:\tif (flow_ctrl != 0xdead)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:262:\t\tpr_warn(\"stmmac: module parameter 'flow_ctrl' is obsolete - please remove from your module configuration\\n\");\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:263:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:264:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:265:static void __stmmac_disable_all_queues(struct stmmac_priv priv)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:266:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:267:\tu8 rx_queues_cnt = priv-\u003eplat-\u003erx_queues_to_use;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:268:\tu8 tx_queues_cnt = priv-\u003eplat-\u003etx_queues_to_use;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:269:\tu8 maxq = max(rx_queues_cnt, tx_queues_cnt);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:270:\tu8 queue;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:271:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:272:\tfor (queue = 0; queue \u003c maxq; queue++) {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:273:\t\tstruct stmmac_channel ch = \u0026priv-\u003echannel[queue];\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:274:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:275:\t\tif (stmmac_xdp_is_enabled(priv) \u0026\u0026\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:276:\t\t test_bit(queue, priv-\u003eaf_xdp_zc_qps)) {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:277:\t\t\tnapi_disable(\u0026ch-\u003erxtx_napi);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:278:\t\t\tcontinue;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:279:\t\t}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:280:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:281:\t\tif (queue \u003c rx_queues_cnt)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:282:\t\t\tnapi_disable(\u0026ch-\u003erx_napi);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:283:\t\tif (queue \u003c tx_queues_cnt)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:284:\t\t\tnapi_disable(\u0026ch-\u003etx_napi);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:285:\t}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:286:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:287:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:288:/\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:289: stmmac_disable_all_queues - Disable all queues\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:290: * @priv: driver private structure\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:291: /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:292:static void stmmac_disable_all_queues(struct stmmac_priv priv)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:293:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:294:\tu8 rx_queues_cnt = priv-\u003eplat-\u003erx_queues_to_use;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:295:\tstruct stmmac_rx_queue rx_q;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:296:\tu8 queue;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:297:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:298:\t/ synchronize_rcu() needed for pending XDP buffers to drain /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:299:\tfor (queue = 0; queue \u003c rx_queues_cnt; queue++) {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:300:\t\trx_q = \u0026priv-\u003edma_conf.rx_queue[queue];\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:301:\t\tif (rx_q-\u003exsk_pool) {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:302:\t\t\tsynchronize_rcu();\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:303:\t\t\tbreak;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:304:\t\t}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:305:\t}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:306:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:307:\t__stmmac_disable_all_queues(priv);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:308:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:309:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:310:/\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:311: stmmac_enable_all_queues - Enable all queues\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:312: * @priv: driver private structure\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:313: /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:314:static void stmmac_enable_all_queues(struct stmmac_priv priv)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:315:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:316:\tu8 rx_queues_cnt = priv-\u003eplat-\u003erx_queues_to_use;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:317:\tu8 tx_queues_cnt = priv-\u003eplat-\u003etx_queues_to_use;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:318:\tu8 maxq = max(rx_queues_cnt, tx_queues_cnt);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:319:\tu8 queue;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:320:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:321:\tfor (queue = 0; queue \u003c maxq; queue++) {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:322:\t\tstruct stmmac_channel ch = \u0026priv-\u003echannel[queue];\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:323:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:324:\t\tif (stmmac_xdp_is_enabled(priv) \u0026\u0026\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:325:\t\t test_bit(queue, priv-\u003eaf_xdp_zc_qps)) {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:326:\t\t\tnapi_enable(\u0026ch-\u003erxtx_napi);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:327:\t\t\tcontinue;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:328:\t\t}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:329:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:330:\t\tif (queue \u003c rx_queues_cnt)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:331:\t\t\tnapi_enable(\u0026ch-\u003erx_napi);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:332:\t\tif (queue \u003c tx_queues_cnt)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:333:\t\t\tnapi_enable(\u0026ch-\u003etx_napi);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:334:\t}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:335:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:336:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:337:static void stmmac_service_event_schedule(struct stmmac_priv priv)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:338:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:339:\tif (!test_bit(STMMAC_DOWN, \u0026priv-\u003estate) \u0026\u0026\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:340:\t !test_and_set_bit(STMMAC_SERVICE_SCHED, \u0026priv-\u003estate))\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:341:\t\tqueue_work(priv-\u003ewq, \u0026priv-\u003eservice_task);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:342:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:343:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:344:static void stmmac_global_err(struct stmmac_priv priv)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:345:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:346:\tnetif_carrier_off(priv-\u003edev);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:347:\tset_bit(STMMAC_RESET_REQUESTED, \u0026priv-\u003estate);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:348:\tstmmac_service_event_schedule(priv);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:349:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:350:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:351:static void print_pkt(unsigned char buf, int len)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:352:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:353:\tpr_debug(\"len = %d byte, buf addr: 0x%p\\n\", len, buf);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:354:\tprint_hex_dump_bytes(\"\", DUMP_PREFIX_OFFSET, buf, len);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:355:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:356:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:357:static inline u32 stmmac_tx_avail(struct stmmac_priv priv, u32 queue)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:358:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:359:\tstruct stmmac_tx_queue tx_q = \u0026priv-\u003edma_conf.tx_queue[queue];\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:360:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:361:\treturn CIRC_SPACE(tx_q-\u003ecur_tx, tx_q-\u003edirty_tx,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:362:\t\t\t priv-\u003edma_conf.dma_tx_size);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:363:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:364:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:365:static size_t stmmac_get_tx_desc_size(struct stmmac_priv priv,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:366:\t\t\t\t struct stmmac_tx_queue tx_q)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:367:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:368:\tif (priv-\u003eextend_desc)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:369:\t\treturn sizeof(struct dma_extended_desc);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:370:\telse if (tx_q-\u003etbs \u0026 STMMAC_TBS_AVAIL)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:371:\t\treturn sizeof(struct dma_edesc);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:372:\telse\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:373:\t\treturn sizeof(struct dma_desc);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:374:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:375:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:376:static struct dma_desc stmmac_get_tx_desc(struct stmmac_priv priv,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:377:\t\t\t\t\t struct stmmac_tx_queue tx_q,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:378:\t\t\t\t\t unsigned int index)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:379:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:380:\tif (priv-\u003eextend_desc)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:381:\t\treturn \u0026tx_q-\u003edma_etx[index].basic;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:382:\telse if (tx_q-\u003etbs \u0026 STMMAC_TBS_AVAIL)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:383:\t\treturn \u0026tx_q-\u003edma_entx[index].basic;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:384:\telse\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:385:\t\treturn \u0026tx_q-\u003edma_tx[index];\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:386:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:387:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:388:static void stmmac_set_queue_tx_tail_ptr(struct stmmac_priv priv,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:389:\t\t\t\t\t struct stmmac_tx_queue tx_q,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:390:\t\t\t\t\t unsigned int chan, unsigned int index)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:391:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:392:\tsize_t desc_size;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:393:\tu32 tx_tail_addr;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:394:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:395:\tdesc_size = stmmac_get_tx_desc_size(priv, tx_q);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:396:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:397:\ttx_tail_addr = tx_q-\u003edma_tx_phy + index desc_size;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:398:\tstmmac_set_tx_tail_ptr(priv, priv-\u003eioaddr, tx_tail_addr, chan);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:399:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:400:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:401:static size_t stmmac_get_rx_desc_size(struct stmmac_priv priv)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:402:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:403:\tif (priv-\u003eextend_desc)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:404:\t\treturn sizeof(struct dma_extended_desc);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:405:\telse\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:406:\t\treturn sizeof(struct dma_desc);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:407:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:408:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:409:static struct dma_desc stmmac_get_rx_desc(struct stmmac_priv priv,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:410:\t\t\t\t\t struct stmmac_rx_queue rx_q,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:411:\t\t\t\t\t unsigned int index)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:412:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:413:\tif (priv-\u003eextend_desc)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:414:\t\treturn \u0026rx_q-\u003edma_erx[index].basic;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:415:\telse\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:416:\t\treturn \u0026rx_q-\u003edma_rx[index];\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:417:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:418:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:419:static void stmmac_set_queue_rx_tail_ptr(struct stmmac_priv priv,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:420:\t\t\t\t\t struct stmmac_rx_queue rx_q,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:421:\t\t\t\t\t unsigned int chan, unsigned int index)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:422:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:423:\t/* This only needs to deal with normal descriptors as enhanced\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:424:\t * descriptiors are only supported with dwmac1000 (\u003cv4.0) which\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:425:\t * does not implement .set_rx_tail_ptr\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:426:\t /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:427:\tu32 rx_tail_addr = rx_q-\u003edma_rx_phy + index sizeof(struct dma_desc);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:428:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:429:\tstmmac_set_rx_tail_ptr(priv, priv-\u003eioaddr, rx_tail_addr, chan);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:430:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:431:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:432:static void stmmac_set_queue_rx_buf_size(struct stmmac_priv priv,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:433:\t\t\t\t\t struct stmmac_rx_queue rx_q,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:434:\t\t\t\t\t unsigned int chan)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:435:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:436:\tu32 buf_size;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:437:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:438:\tif (rx_q-\u003exsk_pool \u0026\u0026 rx_q-\u003ebuf_alloc_num)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:439:\t\tbuf_size = xsk_pool_get_rx_frame_size(rx_q-\u003exsk_pool);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:440:\telse\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:441:\t\tbuf_size = priv-\u003edma_conf.dma_buf_sz;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:442:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:443:\tstmmac_set_dma_bfsize(priv, priv-\u003eioaddr, buf_size, chan);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:444:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:445:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:446:/*\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:447: stmmac_rx_dirty - Get RX queue dirty\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:448: * @priv: driver private structure\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:449: * @queue: RX queue index\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:450: /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:451:static inline u32 stmmac_rx_dirty(struct stmmac_priv priv, u32 queue)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:452:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:453:\tstruct stmmac_rx_queue rx_q = \u0026priv-\u003edma_conf.rx_queue[queue];\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:454:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:455:\treturn CIRC_CNT(rx_q-\u003ecur_rx, rx_q-\u003edirty_rx,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:456:\t\t\tpriv-\u003edma_conf.dma_rx_size);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:457:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:458:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:459:static bool stmmac_eee_tx_busy(struct stmmac_priv priv)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:460:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:461:\tu8 tx_cnt = priv-\u003eplat-\u003etx_queues_to_use;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:462:\tu8 queue;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:463:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:464:\t/* check if all TX queues have the work finished /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:465:\tfor (queue = 0; queue \u003c tx_cnt; queue++) {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:466:\t\tstruct stmmac_tx_queue tx_q = \u0026priv-\u003edma_conf.tx_queue[queue];\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:467:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:468:\t\tif (tx_q-\u003edirty_tx != tx_q-\u003ecur_tx)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:469:\t\t\treturn true; /* still unfinished work /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:470:\t}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:471:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:472:\treturn false;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:473:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:474:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:475:static void stmmac_restart_sw_lpi_timer(struct stmmac_priv priv)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:476:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:477:\tmod_timer(\u0026priv-\u003eeee_ctrl_timer, STMMAC_LPI_T(priv-\u003etx_lpi_timer));\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:478:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:479:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:480:/*\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:481: stmmac_try_to_start_sw_lpi - check and enter in LPI mode\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:482: * @priv: driver private structure\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:483: * Description: this function is to verify and enter in LPI mode in case of\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:484: * EEE.\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:485: /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:486:static void stmmac_try_to_start_sw_lpi(struct stmmac_priv priv)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:487:{\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:488:\tif (stmmac_eee_tx_busy(priv)) {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:489:\t\tstmmac_restart_sw_lpi_timer(priv);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:490:\t\treturn;\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:491:\t}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:492:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:493:\t/* Check and enter in LPI mode /\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:494:\tif (!priv-\u003etx_path_in_lpi_mode)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:495:\t\tstmmac_set_lpi_mode(priv, priv-\u003ehw, STMMAC_LPI_FORCED,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:496:\t\t\t\t priv-\u003etx_lpi_clk_stop, 0);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:497:}\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:498:\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:499:/\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:500: stmmac_stop_sw_lpi - stop transmitting LPI\n\n" }
15/2	2026/09/23 16:27	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 57147 output: 22 thoughts: 176 Thoughts: Analyzing a Patch from Commit 2ebad1c309ead78a3fa347ac82d0ec5c7935460b Okay, let's dive into this commit and see what it's all about. First, I need to understand the context. Ideally, I'd check the full commit message using `git log`, but it seems that's not available. Okay, no problem. I can use what I do know. I see the author is `syz-cluster <triage@syzkaller.com>` and the subject line is "syz-cluster: applied patch under review". That gives me a starting point. Since I don't have git log, I'll need to approach this differently. Given the limited information, the "applied patch" indicates a fix of some kind, and the "under review" suggests this might have been an external contribution or a fix identified by syzkaller. To get a handle on what this patch addresses, I need more context. I can't directly inspect the diff, so let's try a heuristic approach. I'll search the git history for similar messages or changes. Let's start with a focused search. Given the typical nature of such problems, I'll search for key terms related to potential networking issues. The target is the stmmac driver. Since the message mentions a problem, I'll look for variations on "stmmac" combined with "reopen" or a phrase that implies a similar problem: "failed reopening the interface after MTU change". That should hopefully give me some related commits or bug reports that can illuminate the patch's purpose. This will allow me to reconstruct the likely issue this patch is addressing.
16/2	2026/09/23 16:27	tool	grepper	0m Args: { "Expression": "failed reopening the interface after MTU change" } Results: { "Output": "drivers/net/ethernet/stmicro/stmmac/stmmac_main.c=6145=static int stmmac_change_mtu(struct net_device *dev, int new_mtu)\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c-6188-\t\t\tnetif_close(dev);\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:6189:\t\t\tnetdev_err(priv-\u003edev, \"failed reopening the interface after MTU change\\n\");\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c-6190-\t\t\treturn ret;\n" }
17/2	2026/09/23 16:27	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 57906 output: 50 thoughts: 24 Thoughts: Okay, let's dive into this. Here's how I'd approach summarizing the prompt, keeping in mind my expertise: Checking `stmmac_change_mtu` in `stmmac_main.c` Alright, I need to get a handle on how this stmmac driver is handling MTU changes. Specifically, I'm thinking I'll need to go straight to the heart of the matter and examine the `stmmac_change_mtu` function, which I already know is located in the `stmmac_main.c` file. This tells me the core responsibility for MTU alteration likely resides within the driver's mainline functionality, as opposed to being delegated to a helper or specific PHY-related module. It's the most logical place to start dissecting the driver's behaviour. I need to understand how the driver manages interface configurations, and how changes to the Maximum Transmission Unit are implemented at the lower levels. I anticipate encountering aspects related to register updates, potential link re-negotiation, and likely some sort of mechanism for notifying the upper layers of this configuration change. Let's see what's what.
18/2	2026/09/23 16:28	tool	read-file	0m Args: { "File": "drivers/net/ethernet/stmicro/stmmac/stmmac_main.c", "FirstLine": 6155, "LineCount": 45 } Results: { "Contents": "6155:\t\n6156:\t\ttxfifosz /= priv-\u003eplat-\u003etx_queues_to_use;\n6157:\t\n6158:\t\tif (stmmac_xdp_is_enabled(priv) \u0026\u0026 new_mtu \u003e ETH_DATA_LEN) {\n6159:\t\t\tnetdev_dbg(priv-\u003edev, \"Jumbo frames not supported for XDP\\n\");\n6160:\t\t\treturn -EINVAL;\n6161:\t\t}\n6162:\t\n6163:\t\tnew_mtu = STMMAC_ALIGN(new_mtu);\n6164:\t\n6165:\t\t/* If condition true, FIFO is too small or MTU too large /\n6166:\t\tif ((txfifosz \u003c new_mtu) \|\| (new_mtu \u003e BUF_SIZE_16KiB))\n6167:\t\t\treturn -EINVAL;\n6168:\t\n6169:\t\tif (netif_running(dev)) {\n6170:\t\t\tnetdev_dbg(priv-\u003edev, \"restarting interface to change its MTU\\n\");\n6171:\t\t\t/ Try to allocate the new DMA conf with the new mtu /\n6172:\t\t\tdma_conf = stmmac_setup_dma_desc(priv, mtu);\n6173:\t\t\tif (IS_ERR(dma_conf)) {\n6174:\t\t\t\tnetdev_err(priv-\u003edev, \"failed allocating new dma conf for new MTU %d\\n\",\n6175:\t\t\t\t\t mtu);\n6176:\t\t\t\treturn PTR_ERR(dma_conf);\n6177:\t\t\t}\n6178:\t\n6179:\t\t\t__stmmac_release(dev, false);\n6180:\t\n6181:\t\t\tret = __stmmac_open(dev, dma_conf);\n6182:\t\t\tif (ret) {\n6183:\t\t\t\tfree_dma_desc_resources(priv, dma_conf);\n6184:\t\t\t\tkfree(dma_conf);\n6185:\t\t\t\t/ Finish closing the PHY and PM state, but do not repeat\n6186:\t\t\t\t * the data-path teardown after the failed reopen.\n6187:\t\t\t\t */\n6188:\t\t\t\tnetif_close(dev);\n6189:\t\t\t\tnetdev_err(priv-\u003edev, \"failed reopening the interface after MTU change\\n\");\n6190:\t\t\t\treturn ret;\n6191:\t\t\t}\n6192:\t\n6193:\t\t\tkfree(dma_conf);\n6194:\t\n6195:\t\t\tstmmac_set_rx_mode(dev);\n6196:\t\t}\n6197:\t\n6198:\t\tWRITE_ONCE(dev-\u003emtu, mtu);\n6199:\t\tnetdev_update_features(dev);\n" }
19/2	2026/09/23 16:28	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 58962 output: 38 thoughts: 2042 Thoughts: Analyzing a Potential Race Condition in STMMAC Driver with PHY Link Management Okay, so I'm diving into this STMMAC driver code, and I see a potential issue arising from how it handles PHY link interactions, particularly when an MTU change fails during an `__stmmac_open` call. The code used to skip `netif_close` and then later, `__stmmac_release` would run even though `__stmmac_open` had failed. The code has been changed, and now `netif_close(dev)` is called, which in turn calls `stmmac_release`. Inside of this release, `__stmmac_release` is called, but it has a check for `priv->opened`. If the open failed, `priv->opened` is false, and it returns early from `__stmmac_release`. The crucial bit is what happens after that early return. The code proceeds to call `stmmac_legacy_serdes_power_down`, and `phylink_disconnect_phy`, so on and so forth. I'm wondering if this early return is safe with respect to power down and link management, especially since `phylink_suspend` has already run before that. Then, there's `stmmac_resume`, which also calls `netif_close`, and the same early return can occur within `__stmmac_release`. Here the code also runs a `phylink_disconnect_phy` call, which should be fine if it's already disconnected. I see a change in `phylink.c`, which tells me that this function may be called after `phylink_suspend()` if the MAC cannot resume, which is what's happening. This seems okay because `phylink_stop` is now called multiple times, so that the link is always brought down. It checks if the link is already down. Now, I'm thinking about whether I can even reproduce this. Is STMMAC reachable in a standard QEMU environment on amd64? I need to figure out if the hardware is emulated. QEMU emulates e1000, rtl8139, virtio, and other common devices, but I don't see STMMAC or DWMAC explicitly mentioned for amd64. It might be supported on ARM with Allwinner, STM32, or other embedded platforms, or through dwmac-intel for various Intel hardware, but not standard on amd64 QEMU. It also depends on what PCI devices are bound to STMMAC: STMMAC, STMICRO, or SYNOPSYS. Intel Quark, Elkhart Lake, Tiger Lake, Alder Lake devices are also covered, but no standard AMD64 QEMU emulation for these. I should also consider the potential for instantiating it via platform device or a mock device. So, I need to check the STMMAC Kconfig file, to see if that's feasible. I need to figure out if I can even trigger this path in a reproducible manner.
20/2	2026/09/23 16:28	tool	grepper	0m Args: { "Expression": "config ", "PathPrefix": "drivers/net/ethernet/stmicro/stmmac/Kconfig" } Results: { "Output": "drivers/net/ethernet/stmicro/stmmac/Kconfig-1-# SPDX-License-Identifier: GPL-2.0-only\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:2:config STMMAC_ETH\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-3-\ttristate \"STMicroelectronics Multi-Gigabit Ethernet driver\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig=18=if STMMAC_ETH\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-19-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:20:config STMMAC_SELFTESTS\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-21-\tbool \"Support for STMMAC Selftests\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-28-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:29:config STMMAC_PLATFORM\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-30-\ttristate \"STMMAC Platform bus support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig=42=if STMMAC_PLATFORM\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-43-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:44:config DWMAC_DWC_QOS_ETH\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-45-\ttristate \"Support for snps,dwc-qos-ethernet.txt DT binding.\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-51-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:52:config DWMAC_GENERIC\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-53-\ttristate \"Generic driver for DWMAC\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-59-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:60:config DWMAC_ANARION\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-61-\ttristate \"Adaptrum Anarion GMAC support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-68-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:69:config DWMAC_EIC7700\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-70-\ttristate \"Support for Eswin eic7700 ethernet driver\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-77-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:78:config DWMAC_INGENIC\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-79-\ttristate \"Ingenic MAC support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-89-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:90:config DWMAC_IPQ806X\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-91-\ttristate \"QCA IPQ806x DWMAC support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-102-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:103:\t Select the QCOM_SOCINFO config flag to enable specific dwmac\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-104-\t fixup based on the ipq806x SoC revision.\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-105-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:106:config DWMAC_LPC18XX\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-107-\ttristate \"NXP LPC18xx/43xx DWMAC support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-113-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:114:config DWMAC_MEDIATEK\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-115-\ttristate \"MediaTek MT27xx GMAC support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-121-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:122:config DWMAC_MESON\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-123-\ttristate \"Amlogic Meson dwmac support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-132-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:133:config DWMAC_NUVOTON\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-134-\ttristate \"Nuvoton MA35 dwmac support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-144-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:145:config DWMAC_QCOM_ETHQOS\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-146-\ttristate \"Qualcomm ETHQOS support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-154-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:155:config DWMAC_RENESAS_GBETH\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-156-\ttristate \"Renesas RZ/V2H(P) GBETH and RZ/T2H, RZ/N2H GMAC support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-167-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:168:config DWMAC_ROCKCHIP\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-169-\ttristate \"Rockchip dwmac support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-178-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:179:config DWMAC_RZN1\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-180-\ttristate \"Renesas RZ/N1 dwmac support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-190-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:191:config DWMAC_S32\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-192-\ttristate \"NXP S32G/S32R GMAC support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-202-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:203:config DWMAC_SOCFPGA\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-204-\ttristate \"SOCFPGA dwmac support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-217-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:218:config DWMAC_SOPHGO\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-219-\ttristate \"Sophgo dwmac support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-228-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:229:config DWMAC_SPACEMIT\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-230-\ttristate \"Spacemit dwmac support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-240-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:241:config DWMAC_STARFIVE\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-242-\ttristate \"StarFive dwmac support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-252-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:253:config DWMAC_STI\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-254-\ttristate \"STi GMAC support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-264-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:265:config DWMAC_STM32\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-266-\ttristate \"STM32 DWMAC support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-276-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:277:config DWMAC_SUNXI\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-278-\ttristate \"Allwinner GMAC support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-287-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:288:config DWMAC_SUN8I\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-289-\ttristate \"Allwinner sun8i GMAC support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-299-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:300:config DWMAC_SUN55I\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-301-\ttristate \"Allwinner sun55i GMAC200 support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-311-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:312:config DWMAC_THEAD\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-313-\ttristate \"T-HEAD dwmac support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-321-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:322:config DWMAC_IMX8\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-323-\ttristate \"NXP IMX8 DWMAC support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-333-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:334:config DWMAC_INTEL_PLAT\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-335-\ttristate \"Intel dwmac support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-343-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:344:config DWMAC_LOONGSON1\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-345-\ttristate \"Loongson1 GMAC support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-354-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:355:config DWMAC_TEGRA\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-356-\ttristate \"NVIDIA Tegra MGBE support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-363-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:364:config DWMAC_VISCONTI\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-365-\ttristate \"Toshiba Visconti DWMAC support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig=371=endif # STMMAC_PLATFORM\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-372-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:373:config STMMAC_LIBPCI\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-374-\ttristate\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-377-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:378:config DWMAC_INTEL\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-379-\ttristate \"Intel GMAC support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-387-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:388:config DWMAC_LOONGSON\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-389-\ttristate \"Loongson PCI DWMAC support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-397-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:398:config DWMAC_MOTORCOMM\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-399-\ttristate \"Motorcomm PCI DWMAC support\"\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-406-\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:407:config STMMAC_PCI\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-408-\ttristate \"STMMAC PCI bus support\"\n" }
21/2	2026/09/23 16:28	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 65316 output: 30 thoughts: 404 Thoughts: My Analysis of Potential Unreachable Code Okay, hold on a second! I need to investigate something. My initial hunch leads me to `drivers/net/phy/phylink.c`. The question is, is that code path even reachable in our test environment? Let me quickly review the key instructions, specifically Section 2, which outlines what's considered structurally unreachable: hardware requiring physical hardware not emulated by QEMU, driver teardown callbacks only used during hot-unplug, and paths exclusive to the wrong architectures. Now, a crucial question arises: is the Synopsys DesignWare Ethernet MAC (stmmac) actually emulated in QEMU? I have to be sure. Does QEMU even have `stmmac`? It's essential to confirm that stmmac can be probed in QEMU. If it can, have syzkaller, or syzbot hit bugs in stmmac. If I can't confirm this using known bugs, I need to check the syzkaller corpus to see if any virtual devices utilize it. Aha! It seems QEMU does not emulate the Synopsys DesignWare Ethernet MAC on x86_64, a key piece of information. That's a huge clue. But I need to refocus: let's get back to `phylink`. `phylink` is right there in `drivers/net/phy/phylink.c`. The next question is, does `phylink` get used by drivers associated with devices that are, in fact, reachable? Earlier I looked at `phylink_stop`. I remember seeing `drivers/net/usb/asix_devices.c` and `drivers/net/usb/lan78xx.c` in my previous searches, so I'm now going to focus on those two. Does `asix` or `lan78xx` utilize `phylink`? I need to check `drivers/net/usb/asix_devices.c` to see.
22/2	2026/09/23 16:28	tool	grepper	0m Error: no matches Args: { "Expression": "phylink", "PathPrefix": "drivers/net/usb/asix" } Results: { "error": "no matches" }
23/2	2026/09/23 16:28	llm	patch-evaluator-compressor	0m Model: gemini-3.8-flash Args: null Results: null Reply: ### Workspace and Investigation Summary #### 1. Approaches Tried and Results - Patch Inspection: - Investigated commit `2ebad1c309ead78a3fa347ac82d0ec5c7935460b`. - Touched files: - `drivers/net/ethernet/stmicro/stmmac/stmmac.h` - `drivers/net/ethernet/stmicro/stmmac/stmmac_main.c` - `drivers/net/phy/phylink.c` - Reachability Exploration: - Grepped for `stmmac_pci` to determine if STMMAC is tied to physical hardware or emulated devices. Found PCI bindings for Intel, Loongson, Motorcomm, and generic Synopsys GMAC5 (`stmmac_pci.c`, `dwmac-intel.c`, etc.). None are standard QEMU emulated devices. - Grepped for callers of `phylink_stop()` across the kernel. Found that `phylink` is generic infrastructure used not only by `stmmac`, but also by USB network drivers: - `drivers/net/usb/asix_devices.c` (`ax88772_stop`) - `drivers/net/usb/lan78xx.c` (`lan78xx_stop`, `lan78xx_disconnect`) - DSA switch ports (`net/dsa/port.c`, `net/dsa/user.c`) - Read `drivers/net/phy/phylink.c` around `phylink_stop` (lines 2490-2539) and `phylink_suspend` (lines 2625-2669) to analyze changes and reachability. #### 2. Current Hypotheses & Active Lines of Investigation - Reachability of `phylink.c` changes: - `phylink.c` is part of core/shared network PHY management (`drivers/net/phy/phylink.c`), compiled with `CONFIG_PHYLINK`. - Is `phylink_stop()` reachable in standard virtualized environments (e.g. QEMU / syzkaller)? - Yes: USB Ethernet dongles emulated via USB raw gadget / syzkaller (`asix`, `lan78xx`) utilize `phylink` and call `phylink_stop()`. - Also DSA / netdev interfaces using phylink. - The patch modifies logic in `phylink_stop()`: - Avoids double-stopping if `PHYLINK_DISABLE_STOPPED` is already set. - If `PHYLINK_DISABLE_MAC_WOL` was set during suspend, flushes `resolve` work, takes `state_mutex`, conditionally invokes `phylink_link_down(pl)`, and clears the bit. - Reachability of `stmmac` changes: - `stmmac` is an embedded Ethernet MAC (Synopsys DesignWare / STMicroelectronics). - Can it be instantiated in QEMU amd64? Standard QEMU x86/amd64 does not emulate DWMAC/STMMAC controllers (unlike e1000, virtio-net, rtl8139, ne2k_pci). - However, because the patch directly touches `phylink.c` (shared generic library/core driver infrastructure used by reachable USB network devices), changes in `phylink.c` are reachable in QEMU via USB gadget emulation or netdev lifecycle calls. - Need to verify: - Check whether `lan78xx` or `asix` or other drivers can exercise the modified branches in `phylink_stop()`. - Check what Kconfig symbols enable `phylink` and the drivers using it (`PHYLINK`, `USB_NET_DRIVERS`, `USB_LAN78XX`, `USB_NET_AX88179_178A` or `USB_NET_AX88172A`, `STMMAC_ETH`). #### 3. Key File Paths and Code Details - `drivers/net/phy/phylink.c`: ```c void phylink_stop(struct phylink pl) { ASSERT_RTNL(); / phylink_suspend() already stops the link without MAC WoL. / if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) return; if (pl->sfp_bus) sfp_upstream_stop(pl->sfp_bus); if (pl->phydev) phy_stop(pl->phydev); timer_delete_sync(&pl->link_poll); if (pl->link_irq) { free_irq(pl->link_irq, pl); pl->link_irq = 0; } phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED); if (test_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state)) { / Finish the link-down deferred by MAC WoL, without restarting. / flush_work(&pl->resolve); mutex_lock(&pl->state_mutex); if (pl->suspend_link_up) phylink_link_down(pl); __clear_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state); mutex_unlock(&pl->state_mutex); } pl->pcs_state = PCS_STATE_DOWN; phylink_pcs_disable(pl->pcs); } EXPORT_SYMBOL_GPL(phylink_stop); ``` - `drivers/net/ethernet/stmicro/stmmac/stmmac_main.c`: - `__stmmac_release(struct net_device dev, bool napi_disabled)`: - Checks `if (!priv->opened) return; priv->opened = false;` - Checks `if (!napi_disabled) stmmac_disable_all_queues(priv);` - `stmmac_change_mtu(struct net_device dev, int new_mtu)`: - On reopen failure, calls `netif_close(dev);` - `stmmac_resume(struct device dev)`: - On `hw_setup` failure: jumps to `error_stop_dma`, calls `__stmmac_release(ndev, true)` and `netif_close(ndev)`. - `drivers/net/ethernet/stmicro/stmmac/stmmac.h`: - Added `bool opened;` in `struct stmmac_priv`. #### 4. Watchouts / Potential Loops - Avoid doing broad regex greps on entire large files without precise patterns (e.g. `.` on `stmmac_main.c` or `phylink.c` overflowed output buffers). - Need to check Kconfig dependencies for `PHYLINK` and whether `phylink` is enabled and reachable via USB emulation or other standard interfaces in amd64. - Determine if `WorthFuzzing` should be `true` due to `phylink_stop` reachability or `false` if `phylink` WoL/suspend interaction is only triggered via physical PM / hardware paths. Tokens:* input: 56640 output: 1729 thoughts: 0
24/2	2026/09/23 16:29	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 12862 output: 29 thoughts: 0
25/2	2026/09/23 16:29	tool	grepper	0m Args: { "Expression": "phylink_stop", "PathPrefix": "drivers/net/usb" } Results: { "Output": "drivers/net/usb/asix_devices.c=946=static int ax88772_stop(struct usbnet dev)\n--\ndrivers/net/usb/asix_devices.c-949-\ndrivers/net/usb/asix_devices.c:950:\tphylink_stop(priv-\u003ephylink);\ndrivers/net/usb/asix_devices.c-951-\n--\ndrivers/net/usb/lan78xx.c=3538=static int lan78xx_stop(struct net_device net)\n--\ndrivers/net/usb/lan78xx.c-3558-\ndrivers/net/usb/lan78xx.c:3559:\tphylink_stop(dev-\u003ephylink);\ndrivers/net/usb/lan78xx.c-3560-\n--\ndrivers/net/usb/lan78xx.c=4571=static void lan78xx_disconnect(struct usb_interface *intf)\n--\ndrivers/net/usb/lan78xx.c-4583-\trtnl_lock();\ndrivers/net/usb/lan78xx.c:4584:\tphylink_stop(dev-\u003ephylink);\ndrivers/net/usb/lan78xx.c-4585-\tphylink_disconnect_phy(dev-\u003ephylink);\n" }
26/2	2026/09/23 16:29	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 13239 output: 40 thoughts: 0
27/2	2026/09/23 16:29	tool	read-file	0m Args: { "File": "drivers/net/usb/asix_devices.c", "FirstLine": 940, "LineCount": 30 } Results: { "Contents": " 940:\tphylink_err:\n 941:\t\tax88772_mdio_unregister(priv);\n 942:\tmdio_err:\n 943:\t\treturn ret;\n 944:\t}\n 945:\t\n 946:\tstatic int ax88772_stop(struct usbnet dev)\n 947:\t{\n 948:\t\tstruct asix_common_private priv = dev-\u003edriver_priv;\n 949:\t\n 950:\t\tphylink_stop(priv-\u003ephylink);\n 951:\t\n 952:\t\treturn 0;\n 953:\t}\n 954:\t\n 955:\tstatic void ax88772_unbind(struct usbnet dev, struct usb_interface intf)\n 956:\t{\n 957:\t\tstruct asix_common_private priv = dev-\u003edriver_priv;\n 958:\t\n 959:\t\trtnl_lock();\n 960:\t\tphylink_disconnect_phy(priv-\u003ephylink);\n 961:\t\trtnl_unlock();\n 962:\t\tphylink_destroy(priv-\u003ephylink);\n 963:\t\tax88772_mdio_unregister(priv);\n 964:\t\tasix_rx_fixup_common_free(dev-\u003edriver_priv);\n 965:\t\t/ Drop the PM usage ref taken in bind() /\n 966:\t\tpm_runtime_put(\u0026intf-\u003edev);\n 967:\t}\n 968:\t\n 969:\tstatic void ax88178_unbind(struct usbnet dev, struct usb_interface *intf)\n" }
28/2	2026/09/23 16:29	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 13733 output: 34 thoughts: 0
29/2	2026/09/23 16:29	tool	grepper	0m Args: { "Expression": "ax88772_stop", "PathPrefix": "drivers/net/usb/" } Results: { "Output": "drivers/net/usb/asix_devices.c=829=static int ax88772_bind(struct usbnet dev, struct usb_interface intf)\n--\ndrivers/net/usb/asix_devices.c-945-\ndrivers/net/usb/asix_devices.c:946:static int ax88772_stop(struct usbnet *dev)\ndrivers/net/usb/asix_devices.c-947-{\n--\ndrivers/net/usb/asix_devices.c=1366=static const struct driver_info ax88772_info = {\n--\ndrivers/net/usb/asix_devices.c-1370-\t.reset = ax88772_reset,\ndrivers/net/usb/asix_devices.c:1371:\t.stop = ax88772_stop,\ndrivers/net/usb/asix_devices.c-1372-\t.flags = FLAG_ETHER \| FLAG_FRAMING_AX \| FLAG_MULTI_PACKET,\n--\ndrivers/net/usb/asix_devices.c=1377=static const struct driver_info ax88772b_info = {\n--\ndrivers/net/usb/asix_devices.c-1381-\t.reset = ax88772_reset,\ndrivers/net/usb/asix_devices.c:1382:\t.stop = ax88772_stop,\ndrivers/net/usb/asix_devices.c-1383-\t.flags = FLAG_ETHER \| FLAG_FRAMING_AX \| FLAG_MULTI_PACKET,\n--\ndrivers/net/usb/asix_devices.c=1389=static const struct driver_info lxausb_t1l_info = {\n--\ndrivers/net/usb/asix_devices.c-1393-\t.reset = ax88772_reset,\ndrivers/net/usb/asix_devices.c:1394:\t.stop = ax88772_stop,\ndrivers/net/usb/asix_devices.c-1395-\t.flags = FLAG_ETHER \| FLAG_FRAMING_AX \| FLAG_MULTI_PACKET,\n" }
30/2	2026/09/23 16:29	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 14329 output: 34 thoughts: 0
31/2	2026/09/23 16:29	tool	grepper	0m Args: { "Expression": "PHYLINK_DISABLE_STOPPED", "PathPrefix": "drivers/net/phy/" } Results: { "Output": "drivers/net/phy/phylink.c=27=enum {\ndrivers/net/phy/phylink.c:28:\tPHYLINK_DISABLE_STOPPED,\ndrivers/net/phy/phylink.c-29-\tPHYLINK_DISABLE_LINK,\n--\ndrivers/net/phy/phylink.c=1375=static int phylink_change_inband_advert(struct phylink pl)\n--\ndrivers/net/phy/phylink.c-1378-\ndrivers/net/phy/phylink.c:1379:\tif (test_bit(PHYLINK_DISABLE_STOPPED, \u0026pl-\u003ephylink_disable_state))\ndrivers/net/phy/phylink.c-1380-\t\treturn 0;\n--\ndrivers/net/phy/phylink.c=1803=int phylink_set_fixed_link(struct phylink pl,\n--\ndrivers/net/phy/phylink.c-1809-\tif (pl-\u003ecfg_link_an_mode != MLO_AN_PHY \|\| !state \|\|\ndrivers/net/phy/phylink.c:1810:\t !test_bit(PHYLINK_DISABLE_STOPPED, \u0026pl-\u003ephylink_disable_state))\ndrivers/net/phy/phylink.c-1811-\t\treturn -EINVAL;\n--\ndrivers/net/phy/phylink.c=1850=struct phylink phylink_create(struct phylink_config config,\n--\ndrivers/net/phy/phylink.c-1905-\tpl-\u003emac_ops = mac_ops;\ndrivers/net/phy/phylink.c:1906:\t__set_bit(PHYLINK_DISABLE_STOPPED, \u0026pl-\u003ephylink_disable_state);\ndrivers/net/phy/phylink.c-1907-\ttimer_setup(\u0026pl-\u003elink_poll, phylink_fixed_poll, 0);\n--\ndrivers/net/phy/phylink.c=2429=void phylink_start(struct phylink pl)\n--\ndrivers/net/phy/phylink.c-2456-\ndrivers/net/phy/phylink.c:2457:\tphylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_STOPPED);\ndrivers/net/phy/phylink.c-2458-\n--\ndrivers/net/phy/phylink.c=2501=void phylink_stop(struct phylink pl)\n--\ndrivers/net/phy/phylink.c-2505-\t/* phylink_suspend() already stops the link without MAC WoL. /\ndrivers/net/phy/phylink.c:2506:\tif (test_bit(PHYLINK_DISABLE_STOPPED, \u0026pl-\u003ephylink_disable_state))\ndrivers/net/phy/phylink.c-2507-\t\treturn;\n--\ndrivers/net/phy/phylink.c-2518-\ndrivers/net/phy/phylink.c:2519:\tphylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED);\ndrivers/net/phy/phylink.c-2520-\n--\ndrivers/net/phy/phylink.c=2995=int phylink_ethtool_ksettings_set(struct phylink pl,\n--\ndrivers/net/phy/phylink.c-3143-\t\t}\ndrivers/net/phy/phylink.c:3144:\t\tif (!test_bit(PHYLINK_DISABLE_STOPPED,\ndrivers/net/phy/phylink.c-3145-\t\t\t \u0026pl-\u003ephylink_disable_state))\n--\ndrivers/net/phy/phylink.c=3681=static void phylink_sfp_set_config(struct phylink pl, unsigned long supported,\n--\ndrivers/net/phy/phylink.c-3712-\ndrivers/net/phy/phylink.c:3713:\tif (changed \u0026\u0026 !test_bit(PHYLINK_DISABLE_STOPPED,\ndrivers/net/phy/phylink.c-3714-\t\t\t\t \u0026pl-\u003ephylink_disable_state))\n" }
32/2	2026/09/23 16:29	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 15411 output: 39 thoughts: 0
33/2	2026/09/23 16:29	tool	read-file	0m Args: { "File": "drivers/net/phy/phylink.c", "FirstLine": 2500, "LineCount": 40 } Results: { "Contents": "2500:\t /\n2501:\tvoid phylink_stop(struct phylink pl)\n2502:\t{\n2503:\t\tASSERT_RTNL();\n2504:\t\n2505:\t\t/* phylink_suspend() already stops the link without MAC WoL. /\n2506:\t\tif (test_bit(PHYLINK_DISABLE_STOPPED, \u0026pl-\u003ephylink_disable_state))\n2507:\t\t\treturn;\n2508:\t\n2509:\t\tif (pl-\u003esfp_bus)\n2510:\t\t\tsfp_upstream_stop(pl-\u003esfp_bus);\n2511:\t\tif (pl-\u003ephydev)\n2512:\t\t\tphy_stop(pl-\u003ephydev);\n2513:\t\ttimer_delete_sync(\u0026pl-\u003elink_poll);\n2514:\t\tif (pl-\u003elink_irq) {\n2515:\t\t\tfree_irq(pl-\u003elink_irq, pl);\n2516:\t\t\tpl-\u003elink_irq = 0;\n2517:\t\t}\n2518:\t\n2519:\t\tphylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED);\n2520:\t\n2521:\t\tif (test_bit(PHYLINK_DISABLE_MAC_WOL, \u0026pl-\u003ephylink_disable_state)) {\n2522:\t\t\t/ Finish the link-down deferred by MAC WoL, without restarting. /\n2523:\t\t\tflush_work(\u0026pl-\u003eresolve);\n2524:\t\t\tmutex_lock(\u0026pl-\u003estate_mutex);\n2525:\t\t\tif (pl-\u003esuspend_link_up)\n2526:\t\t\t\tphylink_link_down(pl);\n2527:\t\t\t__clear_bit(PHYLINK_DISABLE_MAC_WOL, \u0026pl-\u003ephylink_disable_state);\n2528:\t\t\tmutex_unlock(\u0026pl-\u003estate_mutex);\n2529:\t\t}\n2530:\t\n2531:\t\tpl-\u003epcs_state = PCS_STATE_DOWN;\n2532:\t\n2533:\t\tphylink_pcs_disable(pl-\u003epcs);\n2534:\t}\n2535:\tEXPORT_SYMBOL_GPL(phylink_stop);\n2536:\t\n2537:\t/\n2538:\t phylink_rx_clk_stop_block() - block PHY ability to stop receive clock in LPI\n2539:\t * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\n" }
34/2	2026/09/23 16:29	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 16112 output: 31 thoughts: 0
35/2	2026/09/23 16:29	tool	grepper	0m Args: { "Expression": "phylink_suspend", "PathPrefix": "drivers/net/phy/" } Results: { "Output": "drivers/net/phy/phylink.c=2485=EXPORT_SYMBOL_GPL(phylink_start);\n--\ndrivers/net/phy/phylink.c-2497- * down (in other words, it will trigger a mac_link_down() method call.)\ndrivers/net/phy/phylink.c:2498: * It may also be called after phylink_suspend() if the MAC cannot resume\ndrivers/net/phy/phylink.c-2499- * and the network device must be closed instead.\n--\ndrivers/net/phy/phylink.c=2501=void phylink_stop(struct phylink pl)\n--\ndrivers/net/phy/phylink.c-2504-\ndrivers/net/phy/phylink.c:2505:\t/ phylink_suspend() already stops the link without MAC WoL. /\ndrivers/net/phy/phylink.c-2506-\tif (test_bit(PHYLINK_DISABLE_STOPPED, \u0026pl-\u003ephylink_disable_state))\n--\ndrivers/net/phy/phylink.c=2606=static bool phylink_phy_pm_speed_ctrl(struct phylink pl)\n--\ndrivers/net/phy/phylink.c-2612-/*\ndrivers/net/phy/phylink.c:2613: phylink_suspend() - handle a network device suspend event\ndrivers/net/phy/phylink.c-2614- * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\n--\ndrivers/net/phy/phylink.c-2628- /\ndrivers/net/phy/phylink.c:2629:void phylink_suspend(struct phylink pl, bool mac_wol)\ndrivers/net/phy/phylink.c-2630-{\n--\ndrivers/net/phy/phylink.c-2664-}\ndrivers/net/phy/phylink.c:2665:EXPORT_SYMBOL_GPL(phylink_suspend);\ndrivers/net/phy/phylink.c-2666-\n--\ndrivers/net/phy/phylink.c=2690=EXPORT_SYMBOL_GPL(phylink_prepare_resume);\n--\ndrivers/net/phy/phylink.c-2695- \ndrivers/net/phy/phylink.c:2696: Undo the effects of phylink_suspend(), returning the link to an\ndrivers/net/phy/phylink.c-2697- * operational state.\n" }
36/2	2026/09/23 16:29	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 16783 output: 39 thoughts: 0
37/2	2026/09/23 16:29	tool	read-file	0m Args: { "File": "drivers/net/phy/phylink.c", "FirstLine": 2625, "LineCount": 45 } Results: { "Contents": "2625:\t \n2626:\t Note: when phylink managed Wake-on-Lan is in use, @mac_wol is ignored.\n2627:\t * (struct phylink_mac_ops.mac_set_wol populated.)\n2628:\t /\n2629:\tvoid phylink_suspend(struct phylink pl, bool mac_wol)\n2630:\t{\n2631:\t\tASSERT_RTNL();\n2632:\t\n2633:\t\tif (phylink_mac_supports_wol(pl))\n2634:\t\t\tmac_wol = !!pl-\u003ewolopts_mac;\n2635:\t\n2636:\t\tif (mac_wol \u0026\u0026 (!pl-\u003enetdev \|\| pl-\u003enetdev-\u003eethtool-\u003ewol_enabled)) {\n2637:\t\t\t/* Wake-on-Lan enabled, MAC handling /\n2638:\t\t\tmutex_lock(\u0026pl-\u003estate_mutex);\n2639:\t\n2640:\t\t\t/ Stop the resolver bringing the link up /\n2641:\t\t\t__set_bit(PHYLINK_DISABLE_MAC_WOL, \u0026pl-\u003ephylink_disable_state);\n2642:\t\n2643:\t\t\tpl-\u003esuspend_link_up = phylink_link_is_up(pl);\n2644:\t\t\tif (pl-\u003esuspend_link_up) {\n2645:\t\t\t\t/ Disable the carrier, to prevent transmit timeouts,\n2646:\t\t\t\t * but one would hope all packets have been sent. This\n2647:\t\t\t\t * also means phylink_resolve() will do nothing.\n2648:\t\t\t\t /\n2649:\t\t\t\tif (pl-\u003enetdev)\n2650:\t\t\t\t\tnetif_carrier_off(pl-\u003enetdev);\n2651:\t\t\t\tpl-\u003eold_link_state = false;\n2652:\t\t\t}\n2653:\t\n2654:\t\t\t/ We do not call mac_link_down() here as we want the\n2655:\t\t\t * link to remain up to receive the WoL packets.\n2656:\t\t\t /\n2657:\t\t\tmutex_unlock(\u0026pl-\u003estate_mutex);\n2658:\t\t} else {\n2659:\t\t\tphylink_stop(pl);\n2660:\t\t}\n2661:\t\n2662:\t\tif (phylink_phy_pm_speed_ctrl(pl))\n2663:\t\t\tphylink_speed_down(pl, false);\n2664:\t}\n2665:\tEXPORT_SYMBOL_GPL(phylink_suspend);\n2666:\t\n2667:\t/\n2668:\t phylink_prepare_resume() - prepare to resume a network device\n2669:\t * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\n" }
38/2	2026/09/23 16:29	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 17545 output: 18 thoughts: 0
39/2	2026/09/23 16:29	tool	grepper	0m Args: { "Expression": "git log -1" } Results: { "Output": "Documentation/process/submitting-patches.rst=161=An example call::\nDocumentation/process/submitting-patches.rst-162-\nDocumentation/process/submitting-patches.rst:163:\t$ git log -1 --pretty=fixes 54a4f0239f2e\nDocumentation/process/submitting-patches.rst-164-\tFixes: 54a4f0239f2e (\"KVM: MMU: make kvm_mmu_zap_page() return the number of pages it actually freed\")\n--\nDocumentation/translations/it_IT/process/submitting-patches.rst=179=Un esempio::\nDocumentation/translations/it_IT/process/submitting-patches.rst-180-\nDocumentation/translations/it_IT/process/submitting-patches.rst:181: $ git log -1 --pretty=fixes 54a4f0239f2e\nDocumentation/translations/it_IT/process/submitting-patches.rst-182- Fixes: 54a4f0239f2e (\"KVM: MMU: make kvm_mmu_zap_page() return the number of pages it actually freed\")\n--\nDocumentation/translations/ja_JP/SubmittingPatches=96=http://savannah.nongnu.org/projects/quilt\n--\nDocumentation/translations/ja_JP/SubmittingPatches-151-\nDocumentation/translations/ja_JP/SubmittingPatches:152: $ git log -1 --pretty=fixes 54a4f0239f2e\nDocumentation/translations/ja_JP/SubmittingPatches-153- Fixes: 54a4f0239f2e (\"KVM: MMU: make kvm_mmu_zap_page() return the number of pages it actually freed\")\n--\nDocumentation/translations/ja_JP/process/submitting-patches.rst=158=URL は禁止です。\n--\nDocumentation/translations/ja_JP/process/submitting-patches.rst-178-\nDocumentation/translations/ja_JP/process/submitting-patches.rst:179: $ git log -1 --pretty=fixes 54a4f0239f2e\nDocumentation/translations/ja_JP/process/submitting-patches.rst-180- Fixes: 54a4f0239f2e (\"KVM: MMU: make kvm_mmu_zap_page() return the number of pages it actually freed\")\n--\nDocumentation/translations/sp_SP/process/submitting-patches.rst=172=Un ejemplo de uso::\nDocumentation/translations/sp_SP/process/submitting-patches.rst-173-\nDocumentation/translations/sp_SP/process/submitting-patches.rst:174:\t$ git log -1 --pretty=fixes 54a4f0239f2e\nDocumentation/translations/sp_SP/process/submitting-patches.rst-175-\tFixes: 54a4f0239f2e (\"KVM: MMU: hacer que kvm_mmu_zap_page() devuelva la cantidad de páginas que realmente liberó\")\n--\nDocumentation/translations/zh_CN/process/submitting-patches.rst=86=xyzzy do frotz”或“[I]changed xyzzy to do frotz”，就好像你在命令代码库改变\n--\nDocumentation/translations/zh_CN/process/submitting-patches.rst-129-\nDocumentation/translations/zh_CN/process/submitting-patches.rst:130:\t$ git log -1 --pretty=fixes 54a4f0239f2e\nDocumentation/translations/zh_CN/process/submitting-patches.rst-131-\tFixes: 54a4f0239f2e (\"KVM: MMU: make kvm_mmu_zap_page() return the number of pages it actually freed\")\n--\nDocumentation/translations/zh_TW/process/submitting-patches.rst=87=xyzzy do frotz”或“[I]changed xyzzy to do frotz”，就好像你在命令代碼庫改變\n--\nDocumentation/translations/zh_TW/process/submitting-patches.rst-130-\nDocumentation/translations/zh_TW/process/submitting-patches.rst:131:\t$ git log -1 --pretty=fixes 54a4f0239f2e\nDocumentation/translations/zh_TW/process/submitting-patches.rst-132-\tFixes: 54a4f0239f2e (\"KVM: MMU: make kvm_mmu_zap_page() return the number of pages it actually freed\")\n--\nscripts/git-resolve.sh=30=git_resolve_commit() {\n--\nscripts/git-resolve.sh-88-\t\t\tfor match in \"${matches[@]}\"; do\nscripts/git-resolve.sh:89:\t\t\t\tif git log -1 --format=\"%s\" \"$match\" \| grep -qP \"$grep_pattern\"; then\nscripts/git-resolve.sh-90-\t\t\t\t\techo \"$match\"\n--\ntools/perf/Documentation/Makefile=255=PERF_DATE = $(strip \\\n--\ntools/perf/Documentation/Makefile-257- $(shell date -u -d '$(KBUILD_BUILD_TIMESTAMP)' +%Y-%m-%d), \\\ntools/perf/Documentation/Makefile:258: $(shell git log -1 --pretty=\"format:%cd\" \\\ntools/perf/Documentation/Makefile-259- --date=short --no-show-signature $\u003c)))\n--\ntools/perf/util/PERF-VERSION-GEN=20=then\ntools/perf/util/PERF-VERSION-GEN-21-\tTAG=$(MAKEFLAGS= make -sC ../.. kernelversion)\ntools/perf/util/PERF-VERSION-GEN:22:\tCID=$(git log -1 --abbrev=12 --pretty=format:\"%h\" --no-show-signature 2\u003e/dev/null) \u0026\u0026 CID=\"-g$CID\"\ntools/perf/util/PERF-VERSION-GEN-23-elif test -f ../../PERF-VERSION-FILE\n" }
40/2	2026/09/23 16:29	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 19078 output: 18 thoughts: 1030 Thoughts: Analyzing a Kernel Patch Related to Network PHY and STMMAC Drivers Okay, so grepper found this patch by searching for "git log", which matched files containing that string. My initial focus is on understanding the scope and reachability of this change. It looks like the patch touches two main areas: `drivers/net/phy/phylink.c` and a few files related to `drivers/net/ethernet/stmicro/stmmac/`. First, let's look at `phylink.c`. The core of the change seems to be in `phylink_stop`. There's a new check and logic related to `PHYLINK_DISABLE_STOPPED` and `PHYLINK_DISABLE_MAC_WOL`. The code adds a check at the beginning, prevents a stop if it's already disabled. There is also a second check with associated logic. Now, shifting to the `stmmac` side, I see changes involving a new `opened` flag within `struct stmmac_priv`. The patch appears to be managing this flag in `__stmmac_open`, `__stmmac_release`, `stmmac_change_mtu`, and `stmmac_resume`. It seems the `opened` flag likely relates to device state (open/closed) and is being used to prevent potential issues during network interface open/close sequences and MTU changes. Now, the crucial question is: Can we actually trigger these parts of the code? That means, can we reach `stmmac` and `phylink`? I need to understand where `stmmac` is used. Is it solely hardware-dependent? I'll look at the `stmmac` drivers themselves. Peering into `drivers/net/ethernet/stmicro/stmmac/`, I find platform drivers for various SoCs (Rockchip, Allwinner, STM32, etc.) and PCI drivers. This is interesting. Now, is `stmmac` available in any x86/amd64 emulation environments like QEMU? I need to know this to properly test. I quickly check what is emulated in QEMU. It appears QEMU emulates e1000, rtl8139, pcnet, virtio-net, vmxnet3, USB NICs, and some others, but crucially, it does not emulate Synopsys DesignWare GMAC / STMMAC. That could present a challenge in local testing on a standard x86 system. Okay, let's try to get a broader view of this, and find where `phylink` is being used, more generally, within the kernel. I'll search for calls to `phylink_create` and `phylink_stop` within the source code. That will help me understand its wider context.
41/2	2026/09/23 16:29	tool	grepper	0m Args: { "Expression": "phylink_create" } Results: { "Output": "Documentation/networking/sfp-phylink.rst=74=this documentation.\n--\nDocumentation/networking/sfp-phylink.rst-363-\nDocumentation/networking/sfp-phylink.rst:364:\tphylink = phylink_create(\u0026priv-\u003ephylink_config, node, phy_mode, \u0026phylink_ops);\nDocumentation/networking/sfp-phylink.rst-365-\tif (IS_ERR(phylink)) {\n--\ndrivers/net/ethernet/altera/altera_tse_main.c=1128=static int altera_tse_probe(struct platform_device pdev)\n--\ndrivers/net/ethernet/altera/altera_tse_main.c-1415-\ndrivers/net/ethernet/altera/altera_tse_main.c:1416:\tpriv-\u003ephylink = phylink_create(\u0026priv-\u003ephylink_config,\ndrivers/net/ethernet/altera/altera_tse_main.c-1417-\t\t\t\t of_fwnode_handle(priv-\u003edevice-\u003eof_node),\n--\ndrivers/net/ethernet/atheros/ag71xx.c=1074=static int ag71xx_phylink_setup(struct ag71xx ag)\n--\ndrivers/net/ethernet/atheros/ag71xx.c-1108-\ndrivers/net/ethernet/atheros/ag71xx.c:1109:\tphylink = phylink_create(\u0026ag-\u003ephylink_config, ag-\u003epdev-\u003edev.fwnode,\ndrivers/net/ethernet/atheros/ag71xx.c-1110-\t\t\t\t ag-\u003ephy_if_mode, \u0026ag71xx_phylink_mac_ops);\n--\ndrivers/net/ethernet/cadence/macb_main.c=1023=static int macb_mii_probe(struct net_device netdev)\n--\ndrivers/net/ethernet/cadence/macb_main.c-1085-\ndrivers/net/ethernet/cadence/macb_main.c:1086:\tbp-\u003ephylink = phylink_create(\u0026bp-\u003ephylink_config, bp-\u003epdev-\u003edev.fwnode,\ndrivers/net/ethernet/cadence/macb_main.c-1087-\t\t\t\t bp-\u003ephy_interface, \u0026macb_phylink_ops);\n--\ndrivers/net/ethernet/freescale/dpaa/dpaa_eth.c=201=static int dpaa_netdev_init(struct net_device net_dev,\n--\ndrivers/net/ethernet/freescale/dpaa/dpaa_eth.c-274-\tmac_dev-\u003eupdate_speed = dpaa_eth_cgr_set_speed;\ndrivers/net/ethernet/freescale/dpaa/dpaa_eth.c:275:\tmac_dev-\u003ephylink = phylink_create(\u0026mac_dev-\u003ephylink_config,\ndrivers/net/ethernet/freescale/dpaa/dpaa_eth.c-276-\t\t\t\t\t dev_fwnode(mac_dev-\u003edev),\n--\ndrivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c=560=int dpaa2_mac_connect(struct dpaa2_mac mac)\n--\ndrivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c-624-\ndrivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c:625:\tphylink = phylink_create(\u0026mac-\u003ephylink_config,\ndrivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c-626-\t\t\t\t dpmac_node, mac-\u003eif_mode,\n--\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c=923=static int enetc4_link_init(struct enetc_ndev_priv priv,\n--\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c-941-\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c:942:\terr = enetc_phylink_create(priv, node, \u0026enetc_pl_mac_ops);\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c-943-\tif (err) {\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c-944-\t\tdev_err(dev, \"Failed to create phylink\\n\");\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c:945:\t\tgoto err_phylink_create;\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c-946-\t}\n--\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c-949-\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c:950:err_phylink_create:\ndrivers/net/ethernet/freescale/enetc/enetc4_pf.c-951-\tenetc_mdiobus_destroy(pf);\n--\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c=785=static int enetc_pf_probe(struct pci_dev pdev,\n--\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c-867-\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c:868:\terr = enetc_phylink_create(priv, node, \u0026enetc_mac_phylink_ops);\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c-869-\tif (err)\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c:870:\t\tgoto err_phylink_create;\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c-871-\n--\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c-879-\tenetc_phylink_destroy(priv);\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c:880:err_phylink_create:\ndrivers/net/ethernet/freescale/enetc/enetc_pf.c-881-\tenetc_mdiobus_destroy(pf);\n--\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c=419=EXPORT_SYMBOL_GPL(enetc_mdiobus_destroy);\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c-420-\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c:421:int enetc_phylink_create(struct enetc_ndev_priv priv, struct device_node node,\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c-422-\t\t\t const struct phylink_mac_ops ops)\n--\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c-461-\tpf-\u003ephylink_config.mac_capabilities = mac_caps;\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c:462:\tphylink = phylink_create(\u0026pf-\u003ephylink_config, of_fwnode_handle(node),\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c-463-\t\t\t\t pf-\u003eif_mode, ops);\n--\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c-472-}\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c:473:EXPORT_SYMBOL_GPL(enetc_phylink_create);\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.c-474-\n--\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.h=12=void enetc_mdiobus_destroy(struct enetc_pf pf);\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.h:13:int enetc_phylink_create(struct enetc_ndev_priv priv, struct device_node node,\ndrivers/net/ethernet/freescale/enetc/enetc_pf_common.h-14-\t\t\t const struct phylink_mac_ops ops);\n--\ndrivers/net/ethernet/freescale/fs_enet/fs_enet-main.c=853=static int fs_enet_probe(struct platform_device ofdev)\n--\ndrivers/net/ethernet/freescale/fs_enet/fs_enet-main.c-932-\ndrivers/net/ethernet/freescale/fs_enet/fs_enet-main.c:933:\tphylink = phylink_create(\u0026fep-\u003ephylink_config, dev_fwnode(fep-\u003edev),\ndrivers/net/ethernet/freescale/fs_enet/fs_enet-main.c-934-\t\t\t\t phy_mode, \u0026fs_enet_phylink_mac_ops);\n--\ndrivers/net/ethernet/freescale/ucc_geth.c=3419=static int ucc_geth_probe(struct platform_device ofdev)\n--\ndrivers/net/ethernet/freescale/ucc_geth.c-3573-\ndrivers/net/ethernet/freescale/ucc_geth.c:3574:\tphylink = phylink_create(\u0026ugeth-\u003ephylink_config, dev_fwnode(\u0026dev-\u003edev),\ndrivers/net/ethernet/freescale/ucc_geth.c-3575-\t\t\t\t phy_interface, \u0026ugeth_mac_ops);\n--\ndrivers/net/ethernet/marvell/mvneta.c=5480=static int mvneta_probe(struct platform_device pdev)\n--\ndrivers/net/ethernet/marvell/mvneta.c-5598-\ndrivers/net/ethernet/marvell/mvneta.c:5599:\tphylink = phylink_create(\u0026pp-\u003ephylink_config, pdev-\u003edev.fwnode,\ndrivers/net/ethernet/marvell/mvneta.c-5600-\t\t\t\t phy_mode, \u0026mvneta_phylink_ops);\n--\ndrivers/net/ethernet/marvell/mvpp2/mvpp2_main.c=6841=static int mvpp2_port_probe(struct platform_device pdev,\n--\ndrivers/net/ethernet/marvell/mvpp2/mvpp2_main.c-7148-\ndrivers/net/ethernet/marvell/mvpp2/mvpp2_main.c:7149:\t\tphylink = phylink_create(\u0026port-\u003ephylink_config, port_fwnode,\ndrivers/net/ethernet/marvell/mvpp2/mvpp2_main.c-7150-\t\t\t\t\t phy_mode, \u0026mvpp2_phylink_ops);\n--\ndrivers/net/ethernet/marvell/prestera/prestera_main.c=370=static int prestera_port_sfp_bind(struct prestera_port port)\n--\ndrivers/net/ethernet/marvell/prestera/prestera_main.c-416-\ndrivers/net/ethernet/marvell/prestera/prestera_main.c:417:\t\tphy_link = phylink_create(\u0026port-\u003ephy_config, fwnode,\ndrivers/net/ethernet/marvell/prestera/prestera_main.c-418-\t\t\t\t\t PHY_INTERFACE_MODE_INTERNAL,\n--\ndrivers/net/ethernet/mediatek/mtk_eth_soc.c=4828=static int mtk_add_mac(struct mtk_eth eth, struct device_node np)\n--\ndrivers/net/ethernet/mediatek/mtk_eth_soc.c-4984-\ndrivers/net/ethernet/mediatek/mtk_eth_soc.c:4985:\tphylink = phylink_create(\u0026mac-\u003ephylink_config,\ndrivers/net/ethernet/mediatek/mtk_eth_soc.c-4986-\t\t\t\t of_fwnode_handle(mac-\u003eof_node),\n--\ndrivers/net/ethernet/meta/fbnic/fbnic_netdev.c=746=struct net_device fbnic_netdev_alloc(struct fbnic_dev fbd)\n--\ndrivers/net/ethernet/meta/fbnic/fbnic_netdev.c-834-\ndrivers/net/ethernet/meta/fbnic/fbnic_netdev.c:835:\tif (fbnic_phylink_create(netdev)) {\ndrivers/net/ethernet/meta/fbnic/fbnic_netdev.c-836-\t\tfree_netdev(netdev);\n--\ndrivers/net/ethernet/meta/fbnic/fbnic_netdev.h=111=int fbnic_phylink_get_fecparam(struct net_device netdev,\ndrivers/net/ethernet/meta/fbnic/fbnic_netdev.h-112-\t\t\t struct ethtool_fecparam fecparam);\ndrivers/net/ethernet/meta/fbnic/fbnic_netdev.h:113:int fbnic_phylink_create(struct net_device netdev);\ndrivers/net/ethernet/meta/fbnic/fbnic_netdev.h-114-void fbnic_phylink_destroy(struct net_device netdev);\n--\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c=177=static const struct phylink_mac_ops fbnic_phylink_mac_ops = {\n--\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c-186-/\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c:187: fbnic_phylink_create - Phylink device creation\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c-188- * @netdev: Network Device struct to attach phylink device\n--\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c-196- */\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c:197:int fbnic_phylink_create(struct net_device netdev)\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c-198-{\n--\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c-231-\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c:232:\tphylink = phylink_create(\u0026fbn-\u003ephylink_config, NULL,\ndrivers/net/ethernet/meta/fbnic/fbnic_phylink.c-233-\t\t\t\t fbnic_phylink_select_interface(fbn-\u003eaui),\n--\ndrivers/net/ethernet/microchip/lan743x_main.c=3152=static const struct phylink_mac_ops lan743x_phylink_mac_ops = {\n--\ndrivers/net/ethernet/microchip/lan743x_main.c-3159-\ndrivers/net/ethernet/microchip/lan743x_main.c:3160:static int lan743x_phylink_create(struct lan743x_adapter adapter)\ndrivers/net/ethernet/microchip/lan743x_main.c-3161-{\n--\ndrivers/net/ethernet/microchip/lan743x_main.c-3211-\ndrivers/net/ethernet/microchip/lan743x_main.c:3212:\tpl = phylink_create(\u0026adapter-\u003ephylink_config, NULL,\ndrivers/net/ethernet/microchip/lan743x_main.c-3213-\t\t\t adapter-\u003ephy_interface, \u0026lan743x_phylink_mac_ops);\n--\ndrivers/net/ethernet/microchip/lan743x_main.c=3691=static int lan743x_pcidev_probe(struct pci_dev pdev,\n--\ndrivers/net/ethernet/microchip/lan743x_main.c-3750-\ndrivers/net/ethernet/microchip/lan743x_main.c:3751:\tret = lan743x_phylink_create(adapter);\ndrivers/net/ethernet/microchip/lan743x_main.c-3752-\tif (ret \u003c 0) {\n--\ndrivers/net/ethernet/microchip/lan966x/lan966x_main.c=791=static int lan966x_probe_port(struct lan966x lan966x, u32 p,\n--\ndrivers/net/ethernet/microchip/lan966x/lan966x_main.c-855-\ndrivers/net/ethernet/microchip/lan966x/lan966x_main.c:856:\tphylink = phylink_create(\u0026port-\u003ephylink_config,\ndrivers/net/ethernet/microchip/lan966x/lan966x_main.c-857-\t\t\t\t portnp,\n--\ndrivers/net/ethernet/microchip/sparx5/sparx5_main.c=312=static int sparx5_create_port(struct sparx5 sparx5,\n--\ndrivers/net/ethernet/microchip/sparx5/sparx5_main.c-388-\ndrivers/net/ethernet/microchip/sparx5/sparx5_main.c:389:\tphylink = phylink_create(\u0026spx5_port-\u003ephylink_config,\ndrivers/net/ethernet/microchip/sparx5/sparx5_main.c-390-\t\t\t\t of_fwnode_handle(config-\u003enode),\n--\ndrivers/net/ethernet/mscc/ocelot_net.c=1774=static const struct phylink_mac_ops ocelot_phylink_ops = {\n--\ndrivers/net/ethernet/mscc/ocelot_net.c-1779-\ndrivers/net/ethernet/mscc/ocelot_net.c:1780:static int ocelot_port_phylink_create(struct ocelot ocelot, int port,\ndrivers/net/ethernet/mscc/ocelot_net.c-1781-\t\t\t\t struct device_node portnp)\n--\ndrivers/net/ethernet/mscc/ocelot_net.c-1820-\ndrivers/net/ethernet/mscc/ocelot_net.c:1821:\tphylink = phylink_create(\u0026priv-\u003ephylink_config,\ndrivers/net/ethernet/mscc/ocelot_net.c-1822-\t\t\t\t of_fwnode_handle(portnp),\n--\ndrivers/net/ethernet/mscc/ocelot_net.c=1843=int ocelot_probe_port(struct ocelot ocelot, int port, struct regmap target,\n--\ndrivers/net/ethernet/mscc/ocelot_net.c-1879-\ndrivers/net/ethernet/mscc/ocelot_net.c:1880:\terr = ocelot_port_phylink_create(ocelot, port, portnp);\ndrivers/net/ethernet/mscc/ocelot_net.c-1881-\tif (err)\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c=1374=static int stmmac_phylink_setup(struct stmmac_priv priv)\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c-1465-\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:1466:\tphylink = phylink_create(config, dev_fwnode(priv-\u003edevice),\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c-1467-\t\t\t\t priv-\u003eplat-\u003ephy_interface,\n--\ndrivers/net/ethernet/tehuti/tn40_phy.c=45=int tn40_phy_register(struct tn40_priv priv)\n--\ndrivers/net/ethernet/tehuti/tn40_phy.c-62-\ndrivers/net/ethernet/tehuti/tn40_phy.c:63:\tphylink = phylink_create(config, NULL, PHY_INTERFACE_MODE_XAUI,\ndrivers/net/ethernet/tehuti/tn40_phy.c-64-\t\t\t\t \u0026tn40_mac_ops);\n--\ndrivers/net/ethernet/ti/am65-cpsw-nuss.c=2759=am65_cpsw_nuss_init_port_ndev(struct am65_cpsw_common common, u32 port_idx)\n--\ndrivers/net/ethernet/ti/am65-cpsw-nuss.c-2843-\ndrivers/net/ethernet/ti/am65-cpsw-nuss.c:2844:\tphylink = phylink_create(\u0026port-\u003eslave.phylink_config,\ndrivers/net/ethernet/ti/am65-cpsw-nuss.c-2845-\t\t\t\t of_fwnode_handle(port-\u003eslave.port_np),\n--\ndrivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c=130=static int ngbe_phylink_init(struct wx wx)\n--\ndrivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c-149-\ndrivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c:150:\tphylink = phylink_create(config, NULL, phy_mode, \u0026ngbe_mac_ops);\ndrivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c-151-\tif (IS_ERR(phylink))\n--\ndrivers/net/ethernet/wangxun/txgbe/txgbe_aml.c=482=int txgbe_phylink_init_aml(struct txgbe txgbe)\n--\ndrivers/net/ethernet/wangxun/txgbe/txgbe_aml.c-512-\ndrivers/net/ethernet/wangxun/txgbe/txgbe_aml.c:513:\tphylink = phylink_create(config, NULL, phy_mode, \u0026txgbe_mac_ops_aml);\ndrivers/net/ethernet/wangxun/txgbe/txgbe_aml.c-514-\tif (IS_ERR(phylink))\n--\ndrivers/net/ethernet/wangxun/txgbe/txgbe_phy.c=268=static int txgbe_phylink_init(struct txgbe txgbe)\n--\ndrivers/net/ethernet/wangxun/txgbe/txgbe_phy.c-292-\ndrivers/net/ethernet/wangxun/txgbe/txgbe_phy.c:293:\tphylink = phylink_create(config, fwnode, phy_mode, \u0026txgbe_mac_ops);\ndrivers/net/ethernet/wangxun/txgbe/txgbe_phy.c-294-\tif (IS_ERR(phylink))\n--\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c=2795=static int axienet_probe(struct platform_device pdev)\n--\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c-3120-\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c:3121:\tlp-\u003ephylink = phylink_create(\u0026lp-\u003ephylink_config, pdev-\u003edev.fwnode,\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c-3122-\t\t\t\t lp-\u003ephy_mode,\n--\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c-3125-\t\tret = PTR_ERR(lp-\u003ephylink);\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c:3126:\t\tdev_err(\u0026pdev-\u003edev, \"phylink_create error (%i)\\n\", ret);\ndrivers/net/ethernet/xilinx/xilinx_axienet_main.c-3127-\t\tgoto cleanup_mdio;\n--\ndrivers/net/phy/phylink.c=515=static int phylink_validate_mac_and_pcs(struct phylink pl,\n--\ndrivers/net/phy/phylink.c-530-\tif (pcs) {\ndrivers/net/phy/phylink.c:531:\t\t/* The PCS, if present, must be setup before phylink_create()\ndrivers/net/phy/phylink.c-532-\t\t * has been called. If the ops is not initialised, print an\n--\ndrivers/net/phy/phylink.c=1038=static enum inband_type phylink_get_inband_type(phy_interface_t interface)\n--\ndrivers/net/phy/phylink.c-1070- * phylink_pcs_neg_mode() - helper to determine PCS inband mode\ndrivers/net/phy/phylink.c:1071: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-1072- * @pcs: a pointer to \u0026struct phylink_pcs\n--\ndrivers/net/phy/phylink.c=1770=static int phylink_register_sfp(struct phylink pl,\n--\ndrivers/net/phy/phylink.c-1794- phylink_set_fixed_link() - set the fixed link\ndrivers/net/phy/phylink.c:1795: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-1796- * @state: a pointer to a struct phylink_link_state.\n--\ndrivers/net/phy/phylink.c=1832=EXPORT_SYMBOL_GPL(phylink_set_fixed_link);\n--\ndrivers/net/phy/phylink.c-1834-/*\ndrivers/net/phy/phylink.c:1835: phylink_create() - create a phylink instance\ndrivers/net/phy/phylink.c-1836- * @config: a pointer to the target \u0026struct phylink_config\n--\ndrivers/net/phy/phylink.c-1849- /\ndrivers/net/phy/phylink.c:1850:struct phylink phylink_create(struct phylink_config config,\ndrivers/net/phy/phylink.c-1851-\t\t\t const struct fwnode_handle fwnode,\n--\ndrivers/net/phy/phylink.c-1937-}\ndrivers/net/phy/phylink.c:1938:EXPORT_SYMBOL_GPL(phylink_create);\ndrivers/net/phy/phylink.c-1939-\n--\ndrivers/net/phy/phylink.c-1941- * phylink_destroy() - cleanup and destroy the phylink instance\ndrivers/net/phy/phylink.c:1942: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-1943- \n--\ndrivers/net/phy/phylink.c=1958=EXPORT_SYMBOL_GPL(phylink_destroy);\n--\ndrivers/net/phy/phylink.c-1961- phylink_expects_phy() - Determine if phylink expects a phy to be attached\ndrivers/net/phy/phylink.c:1962: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-1963- \n--\ndrivers/net/phy/phylink.c=2205=static int phylink_attach_phy(struct phylink pl, struct phy_device phy,\n--\ndrivers/net/phy/phylink.c-2223- phylink_connect_phy() - connect a PHY to the phylink instance\ndrivers/net/phy/phylink.c:2224: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2225- * @phy: a pointer to a \u0026struct phy_device.\n--\ndrivers/net/phy/phylink.c=2257=EXPORT_SYMBOL_GPL(phylink_connect_phy);\n--\ndrivers/net/phy/phylink.c-2260- * phylink_of_phy_connect() - connect the PHY specified in the DT mode.\ndrivers/net/phy/phylink.c:2261: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2262- * @dn: a pointer to a \u0026struct device_node.\n--\ndrivers/net/phy/phylink.c=2276=EXPORT_SYMBOL_GPL(phylink_of_phy_connect);\n--\ndrivers/net/phy/phylink.c-2279- * phylink_fwnode_phy_connect() - connect the PHY specified in the fwnode.\ndrivers/net/phy/phylink.c:2280: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2281- * @fwnode: a pointer to a \u0026struct fwnode_handle.\n--\ndrivers/net/phy/phylink.c=2335=EXPORT_SYMBOL_GPL(phylink_fwnode_phy_connect);\n--\ndrivers/net/phy/phylink.c-2339- * instance.\ndrivers/net/phy/phylink.c:2340: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2341- \n--\ndrivers/net/phy/phylink.c=2370=static void phylink_link_changed(struct phylink pl, bool up, const char what)\n--\ndrivers/net/phy/phylink.c-2379- phylink_mac_change() - notify phylink of a change in MAC state\ndrivers/net/phy/phylink.c:2380: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2381- * @up: indicates whether the link is currently up.\n--\ndrivers/net/phy/phylink.c=2412=static irqreturn_t phylink_link_handler(int irq, void data)\n--\ndrivers/net/phy/phylink.c-2422- phylink_start() - start a phylink instance\ndrivers/net/phy/phylink.c:2423: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2424- \n--\ndrivers/net/phy/phylink.c=2485=EXPORT_SYMBOL_GPL(phylink_start);\n--\ndrivers/net/phy/phylink.c-2488- phylink_stop() - stop a phylink instance\ndrivers/net/phy/phylink.c:2489: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2490- \n--\ndrivers/net/phy/phylink.c=2535=EXPORT_SYMBOL_GPL(phylink_stop);\n--\ndrivers/net/phy/phylink.c-2538- phylink_rx_clk_stop_block() - block PHY ability to stop receive clock in LPI\ndrivers/net/phy/phylink.c:2539: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2540- \n--\ndrivers/net/phy/phylink.c=2564=EXPORT_SYMBOL_GPL(phylink_rx_clk_stop_block);\n--\ndrivers/net/phy/phylink.c-2567- phylink_rx_clk_stop_unblock() - unblock PHY ability to stop receive clock\ndrivers/net/phy/phylink.c:2568: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2569- \n--\ndrivers/net/phy/phylink.c=2606=static bool phylink_phy_pm_speed_ctrl(struct phylink pl)\n--\ndrivers/net/phy/phylink.c-2613- * phylink_suspend() - handle a network device suspend event\ndrivers/net/phy/phylink.c:2614: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2615- * @mac_wol: true if the MAC needs to receive packets for Wake-on-Lan\n--\ndrivers/net/phy/phylink.c=2665=EXPORT_SYMBOL_GPL(phylink_suspend);\n--\ndrivers/net/phy/phylink.c-2668- * phylink_prepare_resume() - prepare to resume a network device\ndrivers/net/phy/phylink.c:2669: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2670- \n--\ndrivers/net/phy/phylink.c=2690=EXPORT_SYMBOL_GPL(phylink_prepare_resume);\n--\ndrivers/net/phy/phylink.c-2693- phylink_resume() - handle a network device resume event\ndrivers/net/phy/phylink.c:2694: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2695- \n--\ndrivers/net/phy/phylink.c=2733=EXPORT_SYMBOL_GPL(phylink_resume);\n--\ndrivers/net/phy/phylink.c-2736- phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY\ndrivers/net/phy/phylink.c:2737: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2738- * @wol: a pointer to \u0026struct ethtool_wolinfo to hold the read parameters\n--\ndrivers/net/phy/phylink.c=2770=EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol);\n--\ndrivers/net/phy/phylink.c-2773- * phylink_ethtool_set_wol() - set wake on lan parameters\ndrivers/net/phy/phylink.c:2774: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2775- * @wol: a pointer to \u0026struct ethtool_wolinfo for the desired parameters\n--\ndrivers/net/phy/phylink.c=2902=static void phylink_get_ksettings(const struct phylink_link_state state,\n--\ndrivers/net/phy/phylink.c-2917- phylink_ethtool_ksettings_get() - get the current link settings\ndrivers/net/phy/phylink.c:2918: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2919- * @kset: a pointer to a \u0026struct ethtool_link_ksettings to hold link settings\n--\ndrivers/net/phy/phylink.c=2970=static bool phylink_validate_pcs_inband_autoneg(struct phylink pl,\n--\ndrivers/net/phy/phylink.c-2991- phylink_ethtool_ksettings_set() - set the link settings\ndrivers/net/phy/phylink.c:2992: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-2993- * @kset: a pointer to a \u0026struct ethtool_link_ksettings for the desired modes\n--\ndrivers/net/phy/phylink.c=3158=EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set);\n--\ndrivers/net/phy/phylink.c-3161- * phylink_ethtool_nway_reset() - restart negotiation\ndrivers/net/phy/phylink.c:3162: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-3163- \n--\ndrivers/net/phy/phylink.c=3183=EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset);\n--\ndrivers/net/phy/phylink.c-3186- phylink_ethtool_get_pauseparam() - get the current pause parameters\ndrivers/net/phy/phylink.c:3187: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-3188- * @pause: a pointer to a \u0026struct ethtool_pauseparam\n--\ndrivers/net/phy/phylink.c=3199=EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam);\n--\ndrivers/net/phy/phylink.c-3202- * phylink_ethtool_set_pauseparam() - set the current pause parameters\ndrivers/net/phy/phylink.c:3203: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-3204- * @pause: a pointer to a \u0026struct ethtool_pauseparam\n--\ndrivers/net/phy/phylink.c=3285=EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam);\n--\ndrivers/net/phy/phylink.c-3289- * counter\ndrivers/net/phy/phylink.c:3290: * @pl: a pointer to a \u0026struct phylink returned from phylink_create().\ndrivers/net/phy/phylink.c-3291- \n--\ndrivers/net/phy/phylink.c=3308=EXPORT_SYMBOL_GPL(phylink_get_eee_err);\n--\ndrivers/net/phy/phylink.c-3311- phylink_ethtool_get_eee() - read the energy efficient ethernet parameters\ndrivers/net/phy/phylink.c:3312: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-3313- * @eee: a pointer to a \u0026struct ethtool_keee for the read parameters\n--\ndrivers/net/phy/phylink.c=3334=EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee);\n--\ndrivers/net/phy/phylink.c-3337- * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters\ndrivers/net/phy/phylink.c:3338: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-3339- * @eee: a pointer to a \u0026struct ethtool_keee for the desired parameters\n--\ndrivers/net/phy/phylink.c=3508=static int phylink_mii_write(struct phylink pl, unsigned int phy_id,\n--\ndrivers/net/phy/phylink.c-3526- phylink_mii_ioctl() - generic mii ioctl interface\ndrivers/net/phy/phylink.c:3527: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-3528- * @ifr: a pointer to a \u0026struct ifreq for socket ioctls\n--\ndrivers/net/phy/phylink.c=3601=EXPORT_SYMBOL_GPL(phylink_mii_ioctl);\n--\ndrivers/net/phy/phylink.c-3605- * link partners\ndrivers/net/phy/phylink.c:3606: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-3607- * @sync: perform action synchronously\n--\ndrivers/net/phy/phylink.c=3626=EXPORT_SYMBOL_GPL(phylink_speed_down);\n--\ndrivers/net/phy/phylink.c-3630- * phylink_speed_down()\ndrivers/net/phy/phylink.c:3631: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-3632- \n--\ndrivers/net/phy/phylink.c=4385=EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state);\n--\ndrivers/net/phy/phylink.c-4389- \t\t\t\t which loses state\ndrivers/net/phy/phylink.c:4390: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-4391- \n--\ndrivers/net/phy/phylink.c=4406=EXPORT_SYMBOL_GPL(phylink_replay_link_begin);\n--\ndrivers/net/phy/phylink.c-4410- \t\t\t which lost state\ndrivers/net/phy/phylink.c:4411: * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\ndrivers/net/phy/phylink.c-4412- \n--\ndrivers/net/usb/asix_devices.c=799=static int ax88772_phylink_setup(struct usbnet dev)\n--\ndrivers/net/usb/asix_devices.c-819-\ndrivers/net/usb/asix_devices.c:820:\tphylink = phylink_create(\u0026priv-\u003ephylink_config, dev-\u003enet-\u003edev.fwnode,\ndrivers/net/usb/asix_devices.c-821-\t\t\t\t phy_if_mode, \u0026ax88772_phylink_mac_ops);\n--\ndrivers/net/usb/lan78xx.c=2799=static int lan78xx_phylink_setup(struct lan78xx_net dev)\n--\ndrivers/net/usb/lan78xx.c-2838-\ndrivers/net/usb/lan78xx.c:2839:\tphylink = phylink_create(pc, dev-\u003enet-\u003edev.fwnode,\ndrivers/net/usb/lan78xx.c-2840-\t\t\t\t dev-\u003einterface, \u0026lan78xx_phylink_mac_ops);\n--\ninclude/linux/phylink.h=718=int pcs_pre_init(struct phylink_pcs pcs);\n--\ninclude/linux/phylink.h-721-\ninclude/linux/phylink.h:722:struct phylink phylink_create(struct phylink_config ,\ninclude/linux/phylink.h-723-\t\t\t const struct fwnode_handle ,\n--\nnet/dsa/port.c=1611=static const struct phylink_mac_ops dsa_port_phylink_mac_ops = {\n--\nnet/dsa/port.c-1616-\nnet/dsa/port.c:1617:int dsa_port_phylink_create(struct dsa_port dp)\nnet/dsa/port.c-1618-{\n--\nnet/dsa/port.c-1646-\nnet/dsa/port.c:1647:\tpl = phylink_create(\u0026dp-\u003epl_config, of_fwnode_handle(dp-\u003edn), mode,\nnet/dsa/port.c-1648-\t\t\t mac_ops);\n--\nnet/dsa/port.c=1665=static int dsa_shared_port_phylink_register(struct dsa_port dp)\n--\nnet/dsa/port.c-1673-\nnet/dsa/port.c:1674:\terr = dsa_port_phylink_create(dp);\nnet/dsa/port.c-1675-\tif (err)\n--\nnet/dsa/port.h=100=int dsa_port_mrp_del_ring_role(const struct dsa_port dp,\nnet/dsa/port.h-101-\t\t\t const struct switchdev_obj_ring_role_mrp mrp);\nnet/dsa/port.h:102:int dsa_port_phylink_create(struct dsa_port dp);\nnet/dsa/port.h-103-void dsa_port_phylink_destroy(struct dsa_port dp);\n--\nnet/dsa/user.c=2654=static int dsa_user_phy_setup(struct net_device user_dev)\n--\nnet/dsa/user.c-2673-\nnet/dsa/user.c:2674:\tret = dsa_port_phylink_create(dp);\nnet/dsa/user.c-2675-\tif (ret)\n" }
42/2	2026/09/23 16:29	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 32454 output: 40 thoughts: 450 Thoughts: My Current Analysis of Network Device Emulation Okay, so I'm looking at how `phylink_create` and `phylink_stop` are utilized, and it's clear they are pretty widespread. I see them in `asix_devices.c` (specifically `ax88772_phylink_setup` and `ax88772_stop`), in `lan78xx.c` (`lan78xx_phylink_setup`, `lan78xx_stop`, and `lan78xx_disconnect`), and then sprinkled throughout `net/dsa/port.c`, `net/dsa/user.c`, and various ethernet drivers, including those within `drivers/net/ethernet/stmicro/stmmac/`. Now, the crucial question is how I can best test these with my tools. Can I emulate `asix_devices` or `lan78xx` through USB Raw Gadget in syzkaller? Aha! Yes! Syzkaller is known for its USB fuzzing using Raw Gadget (`/dev/raw-gadget`), where it emulates arbitrary USB devices including exactly ASIX AX88772 and Microchip LAN78xx! That's a huge win! But, I also need to consider other methods. Can STMMAC itself be directly probed? Or can I probe PCI stmmac in QEMU? Hmm, no, QEMU doesn't have stmmac PCI emulation unless someone adds a custom PCI card or mock. Standard QEMU just doesn't have it. What about DSA? Does DSA require physical hardware, or can it use virtual net devices, like veth? Wait a minute! DSA can bind to any netdevice as a conduit (DSA master), so a DSA mock or dummy driver or loopback/veth will work. I need to keep that in mind. Still, DSA switches typically probe via MDIO or SPI or platform/PCI bus, so I need to explore these probe methods as well. And now, USB net devices... this might give me other avenues to test. Let's look specifically at `ax88772_phylink_setup` to investigate a specific use case. Does `ax88772_bind` call `ax88772_phylink_setup`? I'll check `drivers/net/usb/asix_devices.c` for that. That might lead to interesting avenues of attack.
43/2	2026/09/23 16:30	tool	read-file	0m Args: { "File": "drivers/net/usb/asix_devices.c", "FirstLine": 825, "LineCount": 50 } Results: { "Contents": " 825:\t\tpriv-\u003ephylink = phylink;\n 826:\t\treturn 0;\n 827:\t}\n 828:\t\n 829:\tstatic int ax88772_bind(struct usbnet dev, struct usb_interface intf)\n 830:\t{\n 831:\t\tstruct asix_common_private priv;\n 832:\t\tu8 buf[ETH_ALEN] = {0};\n 833:\t\tint ret, i;\n 834:\t\n 835:\t\tpriv = devm_kzalloc(\u0026dev-\u003eudev-\u003edev, sizeof(priv), GFP_KERNEL);\n 836:\t\tif (!priv)\n 837:\t\t\treturn -ENOMEM;\n 838:\t\n 839:\t\tdev-\u003edriver_priv = priv;\n 840:\t\n 841:\t\tret = usbnet_get_endpoints(dev, intf);\n 842:\t\tif (ret)\n 843:\t\t\treturn ret;\n 844:\t\n 845:\t\t/* Maybe the boot loader passed the MAC address via device tree /\n 846:\t\tif (!eth_platform_get_mac_address(\u0026dev-\u003eudev-\u003edev, buf)) {\n 847:\t\t\tnetif_dbg(dev, ifup, dev-\u003enet,\n 848:\t\t\t\t \"MAC address read from device tree\");\n 849:\t\t} else {\n 850:\t\t\t/ Try getting the MAC address from EEPROM /\n 851:\t\t\tif (dev-\u003edriver_info-\u003edata \u0026 FLAG_EEPROM_MAC) {\n 852:\t\t\t\tfor (i = 0; i \u003c (ETH_ALEN \u003e\u003e 1); i++) {\n 853:\t\t\t\t\tret = asix_read_cmd(dev, AX_CMD_READ_EEPROM,\n 854:\t\t\t\t\t\t\t 0x04 + i, 0, 2, buf + i 2,\n 855:\t\t\t\t\t\t\t 0);\n 856:\t\t\t\t\tif (ret \u003c 0)\n 857:\t\t\t\t\t\tbreak;\n 858:\t\t\t\t}\n 859:\t\t\t} else {\n 860:\t\t\t\tret = asix_read_cmd(dev, AX_CMD_READ_NODE_ID,\n 861:\t\t\t\t\t\t 0, 0, ETH_ALEN, buf, 0);\n 862:\t\t\t}\n 863:\t\n 864:\t\t\tif (ret \u003c 0) {\n 865:\t\t\t\tnetdev_dbg(dev-\u003enet, \"Failed to read MAC address: %d\\n\",\n 866:\t\t\t\t\t ret);\n 867:\t\t\t\treturn ret;\n 868:\t\t\t}\n 869:\t\t}\n 870:\t\n 871:\t\tasix_set_netdev_dev_addr(dev, buf);\n 872:\t\n 873:\t\tdev-\u003enet-\u003enetdev_ops = \u0026ax88772_netdev_ops;\n 874:\t\tdev-\u003enet-\u003eethtool_ops = \u0026ax88772_ethtool_ops;\n" }
44/2	2026/09/23 16:30	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 34279 output: 40 thoughts: 17 Thoughts: Okay, here's my take on those thoughts, tailored for an expert audience and presented in the first person: Diving Deeper into `ax88772_bind` Alright, so the call went through, and now I need to understand the implications of the rest of the `ax88772_bind` function. That initial piece gave me a starting point, but the real work, the actual binding process, lies within the subsequent lines of code. I need to figure out exactly how this driver is attaching itself to the network interface, what resources it's claiming, and how it's interacting with the hardware. I want to see how it's setting up the communication channels, handling interrupts, configuring the MAC address, and initializing any data structures specific to the chip's peculiarities. I'm looking for the nitty-gritty details now – the register writes, the DMA setup, the error handling, and the power management sequences. This is where the rubber meets the road, and where I can gain insights into its performance characteristics and potential areas for optimization. This will be the key to understanding its potential, or diagnosing issues if they appear.
45/2	2026/09/23 16:30	tool	read-file	0m Args: { "File": "drivers/net/usb/asix_devices.c", "FirstLine": 875, "LineCount": 45 } Results: { "Contents": " 875:\t\tdev-\u003enet-\u003eneeded_headroom = 4; /* cf asix_tx_fixup() /\n 876:\t\tdev-\u003enet-\u003eneeded_tailroom = 4; / cf asix_tx_fixup() /\n 877:\t\n 878:\t\tret = asix_read_phy_addr(dev, true);\n 879:\t\tif (ret \u003c 0)\n 880:\t\t\treturn ret;\n 881:\t\n 882:\t\tpriv-\u003ephy_addr = ret;\n 883:\t\tpriv-\u003eembd_phy = ((priv-\u003ephy_addr \u0026 0x1f) == AX_EMBD_PHY_ADDR);\n 884:\t\n 885:\t\tret = asix_read_cmd(dev, AX_CMD_STATMNGSTS_REG, 0, 0, 1,\n 886:\t\t\t\t \u0026priv-\u003echipcode, 0);\n 887:\t\tif (ret \u003c 0) {\n 888:\t\t\tnetdev_dbg(dev-\u003enet, \"Failed to read STATMNGSTS_REG: %d\\n\", ret);\n 889:\t\t\treturn ret;\n 890:\t\t}\n 891:\t\n 892:\t\tpriv-\u003echipcode \u0026= AX_CHIPCODE_MASK;\n 893:\t\n 894:\t\tpriv-\u003eresume = ax88772_resume;\n 895:\t\tpriv-\u003esuspend = ax88772_suspend;\n 896:\t\tif (priv-\u003echipcode == AX_AX88772_CHIPCODE)\n 897:\t\t\tpriv-\u003ereset = ax88772_hw_reset;\n 898:\t\telse\n 899:\t\t\tpriv-\u003ereset = ax88772a_hw_reset;\n 900:\t\n 901:\t\tret = priv-\u003ereset(dev, 0);\n 902:\t\tif (ret \u003c 0) {\n 903:\t\t\tnetdev_dbg(dev-\u003enet, \"Failed to reset AX88772: %d\\n\", ret);\n 904:\t\t\treturn ret;\n 905:\t\t}\n 906:\t\n 907:\t\t/ Asix framing packs multiple eth frames into a 2K usb bulk transfer /\n 908:\t\tif (dev-\u003edriver_info-\u003eflags \u0026 FLAG_FRAMING_AX) {\n 909:\t\t\t/ hard_mtu is still the default - the device does not support\n 910:\t\t\t jumbo eth frames */\n 911:\t\t\tdev-\u003erx_urb_size = 2048;\n 912:\t\t}\n 913:\t\n 914:\t\tpriv-\u003epresvd_phy_bmcr = 0;\n 915:\t\tpriv-\u003epresvd_phy_advertise = 0;\n 916:\t\n 917:\t\tret = ax88772_init_mdio(dev);\n 918:\t\tif (ret)\n 919:\t\t\tgoto mdio_err;\n" }
46/2	2026/09/23 16:30	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 35365 output: 40 thoughts: 11 Thoughts: Okay, here's the summary, assuming I'm the expert and the "text" refers to my own thought process within lines 920-945: Delving into the Nuances of... Alright, let's break this down. Line 920... hmm, that's where I started really grappling with [Insert subject matter from the text if possible, e.g., the implications of the new data model, the performance bottlenecks in the algorithm, the philosophical implications of the proposed theory]. Initially, I was thinking about it from a purely [e.g., technical, theoretical, practical] standpoint, considering [e.g., the direct consequences, the obvious benefits, the immediate limitations]. Lines 925 through 930… that’s where I started to see the bigger picture. The connection with [e.g., the existing framework, previous research, real-world applications] became clearer, and a new layer of complexity emerged. I was asking myself… is this just a tweak, or a paradigm shift? How does this interplay with [e.g., other variables, external forces, the user's workflow]? By line 935, I found myself getting caught up in the potential pitfalls. That's where I was starting to see the implications of this approach. Specifically, the potential risks associated with [e.g., scalability, edge cases, integration with legacy systems]. Line 940, my mind turned toward mitigation strategies. I began sketching out potential solutions, thinking about [e.g., alternative architectures, defensive programming, fallback mechanisms]. My thinking here pivoted to the question of efficiency. It's a trade-off. Can we do this while maintaining performance? And finally, at line 945, I'm at the precipice of a conclusion, recognizing a need for careful evaluation and probably some further testing. I'm now wrestling with the [e.g., short-term gains, long-term costs, potential for unforeseen consequences] and contemplating the next steps. I need to [e.g., model the corner cases, re-run the experiments, review the literature] before I commit to a definitive position.
47/2	2026/09/23 16:30	tool	read-file	0m Args: { "File": "drivers/net/usb/asix_devices.c", "FirstLine": 920, "LineCount": 25 } Results: { "Contents": " 920:\t\n 921:\t\tret = ax88772_phylink_setup(dev);\n 922:\t\tif (ret)\n 923:\t\t\tgoto phylink_err;\n 924:\t\n 925:\t\tret = ax88772_init_phy(dev);\n 926:\t\tif (ret)\n 927:\t\t\tgoto initphy_err;\n 928:\t\n 929:\t\t/* Keep this interface runtime-PM active by taking a usage ref.\n 930:\t\t * Prevents runtime suspend while bound and avoids resume paths\n 931:\t\t * that could deadlock (autoresume under RTNL while USB PM lock\n 932:\t\t * is held, phylink/MDIO wants RTNL).\n 933:\t\t */\n 934:\t\tpm_runtime_get_noresume(\u0026intf-\u003edev);\n 935:\t\n 936:\t\treturn 0;\n 937:\t\n 938:\tinitphy_err:\n 939:\t\tphylink_destroy(priv-\u003ephylink);\n 940:\tphylink_err:\n 941:\t\tax88772_mdio_unregister(priv);\n 942:\tmdio_err:\n 943:\t\treturn ret;\n 944:\t}\n" }
48/2	2026/09/23 16:30	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 36249 output: 29 thoughts: 103 Thoughts: Here's my analysis of this code snippet: My Line of Reasoning with Network Driver Management Okay, so I'm looking at how these USB network drivers handle their lifecycle, specifically the `ax88772` and the potential comparison with `lan78xx`. It seems like with the `ax88772` driver in `usbnet`, the initial setup involves `ax88772_phylink_setup(dev)`. That makes sense - establishing the physical link is a critical first step. Then, when the network interface is brought down – an `ifdown` or a `netif_stop` event – the `ax88772_stop` function is called. Crucially, this function then calls `phylink_stop(priv->phylink)`. Aha! This suggests that `phylink` is being used for the physical link management and is what's cleaned up during the shutdown. Now, that brings up a question, which is what about `lan78xx`? I need to check out what the corresponding open and stop functions are in that driver. Specifically, I'm interested in how `lan78xx_open` and `lan78xx_stop` handle the PHY link and how the network device is shut down, and what `phylink` calls if any are made, if the code base is similar or very different. I need to understand if the approach is consistent or if `lan78xx` has a different method, perhaps a bespoke one, for managing the link. The comparison might uncover some useful design patterns or potential issues.
49/2	2026/09/23 16:30	tool	grepper	0m Args: { "Expression": "phylink_start", "PathPrefix": "drivers/net/usb" } Results: { "Output": "drivers/net/usb/asix_devices.c=332=static int ax88772_reset(struct usbnet dev)\n--\ndrivers/net/usb/asix_devices.c-353-\ndrivers/net/usb/asix_devices.c:354:\tphylink_start(priv-\u003ephylink);\ndrivers/net/usb/asix_devices.c-355-\n--\ndrivers/net/usb/lan78xx.c=3462=static int lan78xx_open(struct net_device net)\n--\ndrivers/net/usb/lan78xx.c-3490-\ndrivers/net/usb/lan78xx.c:3491:\tphylink_start(dev-\u003ephylink);\ndrivers/net/usb/lan78xx.c-3492-\n" }
50/2	2026/09/23 16:30	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 36944 output: 30 thoughts: 99 Thoughts: Here's my understanding of the relevant code concerning the LAN78xx driver, focusing on its interaction with phylink: LAN78xx Driver Phylink Management Okay, so I'm looking at how the LAN78xx driver interacts with phylink, and it seems pretty straightforward. When `lan78xx_open()` is called, the driver initiates the link by calling `phylink_start()` on the device's phylink structure (`dev->phylink`). This makes perfect sense; opening the device logically means starting the link negotiation process, right? Then I see the opposite: `lan78xx_stop()` calls `phylink_stop()`. That's expected, stopping the device connection logically translates to stopping the phylink process. `lan78xx_disconnect()` also calls `phylink_stop()`, which is consistent with the goal of shutting the connection down. Now, `lan78xx_suspend()` is next, I better investigate that function to make sure that the driver is handling device suspension correctly, in terms of phylink interactions.
51/2	2026/09/23 16:30	tool	grepper	0m Args: { "Expression": "phylink_suspend", "PathPrefix": "drivers/net/usb" } Results: { "Output": "drivers/net/usb/asix_devices.c=596=static void ax88772_suspend(struct usbnet dev)\n--\ndrivers/net/usb/asix_devices.c-602-\t\trtnl_lock();\ndrivers/net/usb/asix_devices.c:603:\t\tphylink_suspend(priv-\u003ephylink, false);\ndrivers/net/usb/asix_devices.c-604-\t\trtnl_unlock();\n--\ndrivers/net/usb/asix_devices.c-623- - The MAC driver must hold RTNL when calling phylink interfaces such as\ndrivers/net/usb/asix_devices.c:624: * phylink_suspend()/resume(). Those calls will also perform MDIO I/O.\ndrivers/net/usb/asix_devices.c-625- \n--\ndrivers/net/usb/lan78xx.c=5115=static int lan78xx_suspend(struct usb_interface intf, pm_message_t message)\n--\ndrivers/net/usb/lan78xx.c-5142-\t\trtnl_lock();\ndrivers/net/usb/lan78xx.c:5143:\t\tphylink_suspend(dev-\u003ephylink, false);\ndrivers/net/usb/lan78xx.c-5144-\t\trtnl_unlock();\n" }
52/2	2026/09/23 16:30	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 37658 output: 37 thoughts: 1179 Thoughts: Analyzing a Networking Driver Patch Alright, let's break this down. First, I see that both `ax88772` and `lan78xx` are USB ethernet drivers, which is useful to keep in mind. Now, I'm digging into `phylink_suspend()` and, specifically, the changes in `phylink_stop()`. I'm immediately interested in how the logic flow works in this function. The core of this patch seems to center around preventing redundant operations in `phylink_stop()`. Before this change, calling `phylink_stop()` when the link was already down would trigger a lot of redundant calls - `timer_delete_sync()`, `phylink_run_resolve_and_disable()`, etc. Now, this check: ```c if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) return; ``` prevents that. It short-circuits the function if `PHYLINK_DISABLE_STOPPED` is set. This means, if `phylink_stop` is called more than once, it will only do the work the first time. Crucially, the code still handles `PHYLINK_DISABLE_MAC_WOL` correctly. If that flag is set, it executes a separate block to finish the link-down sequence deferred by MAC WoL, ensuring a proper state transition. So, `phylink_suspend` has set `PHYLINK_DISABLE_MAC_WOL`, and now `phylink_stop` will clean this up by doing the deferred tasks. I'm noting that the `phylink_create()` function sets `PHYLINK_DISABLE_STOPPED`, and `phylink_start()` clears it. Then, `phylink_stop()` sets it again. This looks like part of the larger state machine, and it's definitely something to watch. The patch's impact is significant because `phylink.c` is core networking infrastructure, and this change could affect multiple drivers that use it. In fact, now, thinking more broadly, I should look at other users of `phylink`. Now, out of curiosity, I might also check to see whether this applies to `stmmac` as well. Could `stmmac` be reached when running under QEMU? I'd need to identify which PCI vendor/device ID is for the `stmmac`.
53/2	2026/09/23 16:30	tool	grepper	0m Args: { "Expression": "PCI_DEVICE\\(", "PathPrefix": "drivers/net/ethernet/stmicro/stmmac" } Results: { "Output": "drivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c=367=static const struct pci_device_id dwmac_motorcomm_pci_id_table[] = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c:368:\t{ PCI_DEVICE(PCI_VENDOR_ID_MOTORCOMM, 0x6801) },\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c-369-\t{ },\n" }
54/2	2026/09/23 16:30	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 39546 output: 37 thoughts: 14 Thoughts: Here's a summary of my thought process, as requested: Diving into `stmmac_pci.c` Okay, time to get to the heart of the matter. I need to understand what's happening with this `stmmac` driver in the context of a PCI interface. So, my initial focus is going to be on the `stmmac_pci.c` file. This is where the PCI-specific initialization, resource allocation, and likely interrupt handling for the Synopsys Ethernet MAC should reside. I expect to find the crucial glue code that connects the generic `stmmac` driver to the PCI bus. I'm looking for how they are handling PCI device probe and removal and where they are getting the memory-mapped I/O base addresses and interrupt numbers. This file should be a key access point to understand the interaction between the driver and the PCI bus. Let's see what we can find.
55/2	2026/09/23 16:30	tool	grepper	0m Error: no matches Args: { "Expression": "PCI_VDEVICE", "PathPrefix": "drivers/net/ethernet/stmicro/stmmac" } Results: { "error": "no matches" }
56/2	2026/09/23 16:30	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 39811 output: 39 thoughts: 0
57/2	2026/09/23 16:30	tool	grepper	0m Args: { "Expression": "pci_device_id", "PathPrefix": "drivers/net/ethernet/stmicro/stmmac" } Results: { "Output": "drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c=1263=static int intel_eth_pci_probe(struct pci_dev pdev,\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:1264:\t\t\t const struct pci_device_id id)\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1265-{\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c=1362=static void intel_eth_pci_remove(struct pci_dev pdev)\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1394-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c:1395:static const struct pci_device_id intel_eth_pci_id_table[] = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-intel.c-1396-\t{ PCI_DEVICE_DATA(INTEL, QUARK, \u0026quark_info) },\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c=479=static int loongson_dwmac_fix_reset(struct stmmac_priv priv)\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c-497-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:498:static int loongson_dwmac_probe(struct pci_dev pdev, const struct pci_device_id id)\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c-499-{\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c=578=static void loongson_dwmac_remove(struct pci_dev pdev)\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c-595-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c:596:static const struct pci_device_id loongson_dwmac_id_table[] = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c-597-\t{ PCI_DEVICE_DATA(LOONGSON, GMAC1, \u0026loongson_gmac_pci_info) },\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c=264=static int motorcomm_setup_irq(struct pci_dev pdev,\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c-292-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c:293:static int motorcomm_probe(struct pci_dev pdev, const struct pci_device_id id)\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c-294-{\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c=362=static void motorcomm_remove(struct pci_dev pdev)\n--\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c-366-\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c:367:static const struct pci_device_id dwmac_motorcomm_pci_id_table[] = {\ndrivers/net/ethernet/stmicro/stmmac/dwmac-motorcomm.c-368-\t{ PCI_DEVICE(PCI_VENDOR_ID_MOTORCOMM, 0x6801) },\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c=118=static int stmmac_pci_probe(struct pci_dev pdev,\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:119:\t\t\t const struct pci_device_id id)\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-120-{\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c=192=static void stmmac_pci_remove(struct pci_dev pdev)\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-202-\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c:203:static const struct pci_device_id stmmac_id_table[] = {\ndrivers/net/ethernet/stmicro/stmmac/stmmac_pci.c-204-\t{ PCI_DEVICE_DATA(STMMAC, STMMAC, \u0026stmmac_pci_info) },\n" }
58/2	2026/09/23 16:30	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 41142 output: 29 thoughts: 141 Thoughts: Investigating PCI Device Emulation in QEMU Okay, so none of these PCI devices are actually emulated by QEMU – that much is clear. But wait a minute, `phylink.c`... that's not driver-specific hardware code. It lives in `drivers/net/phy/phylink.c`, so it's clearly generic link management infrastructure for PHY/MAC links. That's a good starting point. Now, what's using `PHYLINK`? I need to figure out which networking drivers are relying on this mechanism. Let's start by considering `USB_NET_AX88179_178A` or `USB_NET_AX88172A` / `USB_NET_AX88772`... those seem like prime candidates. I'll need to check the Kconfig files, specifically focusing on `asix_devices.c` and `lan78xx.c`. I need to see how these USB network adapters are structured and if they interact with the PHY layer in a relevant way. This will guide me in tracing any interactions within QEMU that might be related to PHY.
59/2	2026/09/23 16:30	tool	grepper	0m Args: { "Expression": "asix_devices", "PathPrefix": "drivers/net/usb" } Results: { "Output": "drivers/net/usb/Makefile=13=obj-$(CONFIG_USB_NET_AX8817X)\t+= asix.o\ndrivers/net/usb/Makefile:14:asix-y := asix_devices.o asix_common.o ax88172a.o\ndrivers/net/usb/Makefile-15-obj-$(CONFIG_USB_NET_AX88179_178A) += ax88179_178a.o\n--\ndrivers/net/usb/sr9800.c-4- \ndrivers/net/usb/sr9800.c:5: Based on asix_common.c, asix_devices.c\ndrivers/net/usb/sr9800.c-6- *\n" }
60/2	2026/09/23 16:30	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 41773 output: 38 thoughts: 0
61/2	2026/09/23 16:31	tool	grepper	0m Args: { "Expression": "USB_NET_AX8817X", "PathPrefix": "drivers/net/usb/Kconfig" } Results: { "Output": "drivers/net/usb/Kconfig=132=config USB_USBNET\n--\ndrivers/net/usb/Kconfig-165-\ndrivers/net/usb/Kconfig:166:config USB_NET_AX8817X\ndrivers/net/usb/Kconfig-167-\ttristate \"ASIX AX88xxx Based USB 2.0 Ethernet Adapters\"\n" }
62/2	2026/09/23 16:31	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 41919 output: 36 thoughts: 27 Thoughts: Okay, here's my interpretation of that thought process, assuming I'm a networking expert: Investigating USB Network Driver Configuration Right, let's dive in. The thought process is pretty straightforward: I need to investigate the configuration options for the `USB_NET_AX8817X` driver. I know that kind of driver configuration is generally found in the `Kconfig` files within the kernel source tree, specifically in the `drivers/net/usb/` directory. Therefore, I need to open the `drivers/net/usb/Kconfig` file and check what it says about that specific driver. This will tell me how the driver is enabled, if it depends on anything else, and what configuration options are available to me. It's a key first step in understanding, modifying, or debugging the functionality of that particular USB network interface card.
63/2	2026/09/23 16:31	tool	read-file	0m Args: { "File": "drivers/net/usb/Kconfig", "FirstLine": 165, "LineCount": 25 } Results: { "Contents": " 165:\t\n 166:\tconfig USB_NET_AX8817X\n 167:\t\ttristate \"ASIX AX88xxx Based USB 2.0 Ethernet Adapters\"\n 168:\t\tdepends on USB_USBNET\n 169:\t\tselect CRC32\n 170:\t\tselect PHYLINK\n 171:\t\tselect AX88796B_PHY\n 172:\t\timply NET_SELFTESTS\n 173:\t\tdefault y\n 174:\t\thelp\n 175:\t\t This option adds support for ASIX AX88xxx based USB 2.0\n 176:\t\t 10/100 Ethernet adapters.\n 177:\t\n 178:\t\t This driver should work with at least the following devices:\n 179:\t\t * Aten UC210T\n 180:\t\t * ASIX AX88172\n 181:\t\t * Billionton Systems, USB2AR\n 182:\t\t * Billionton Systems, GUSB2AM-1G-B\n 183:\t\t * Buffalo LUA-U2-KTX\n 184:\t\t * Corega FEther USB2-TX\n 185:\t\t * D-Link DUB-E100\n 186:\t\t * Hawking UF200\n 187:\t\t * Linksys USB200M\n 188:\t\t * Netgear FA120\n 189:\t\t * Sitecom LN-029\n" }
64/2	2026/09/23 16:31	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 42567 output: 32 thoughts: 52 Thoughts: Here's my analysis of those lines: Examining USB Ethernet Driver Configuration Okay, so `USB_NET_AX8817X` is directly enabling `PHYLINK` and setting it as a default. That's a good starting point to understand this specific driver's dependencies. Makes sense. These AX8817x-based adapters probably need a PHY. I'd assume the default `y` means it's pretty integrated. Now, I need to understand if this is consistent across other USB Ethernet drivers. Let me quickly check the `drivers/net/usb/Kconfig` file. I'm especially interested in `USB_LAN78XX`. I suspect it'll follow a similar pattern, but it's important to verify and understand any potential differences in PHY handling between these USB Ethernet implementations. Let's see what the configuration for that driver looks like. That'll give me a more complete picture.
65/2	2026/09/23 16:31	tool	grepper	0m Args: { "Expression": "LAN78XX", "PathPrefix": "drivers/net/usb/Kconfig" } Results: { "Output": "drivers/net/usb/Kconfig=99=config USB_RTL8152\n--\ndrivers/net/usb/Kconfig-112-\ndrivers/net/usb/Kconfig:113:config USB_LAN78XX\ndrivers/net/usb/Kconfig:114:\ttristate \"Microchip LAN78XX Based USB Ethernet Adapters\"\ndrivers/net/usb/Kconfig-115-\tselect MII\n--\ndrivers/net/usb/Kconfig-120-\thelp\ndrivers/net/usb/Kconfig:121:\t This option adds support for Microchip LAN78XX based USB 2\ndrivers/net/usb/Kconfig-122-\t \u0026 USB 3 10/100/1000 Ethernet adapters.\n" }
66/2	2026/09/23 16:31	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 43057 output: 36 thoughts: 14 Thoughts: Here's my thought process, as it is: Checking USB_LAN78XX Dependencies Alright, let's dive in and dissect this `USB_LAN78XX` module. My immediate priority is to understand its dependencies. I need to know what other components, drivers, or libraries it relies on to function correctly. This is critical for everything from troubleshooting to refactoring and, of course, integrating it into any new system. I'm going to start by pulling up the relevant documentation and header files – I'm looking for include statements, build configurations, and any explicit mentions of supporting hardware or software. I need to build a mental map of its ecosystem and how it fits in to the wider architecture. This initial dependency check will shape my understanding, and inform everything that follows.
67/2	2026/09/23 16:31	tool	read-file	0m Args: { "File": "drivers/net/usb/Kconfig", "FirstLine": 110, "LineCount": 20 } Results: { "Contents": " 110:\t\t To compile this driver as a module, choose M here: the\n 111:\t\t module will be called r8152.\n 112:\t\n 113:\tconfig USB_LAN78XX\n 114:\t\ttristate \"Microchip LAN78XX Based USB Ethernet Adapters\"\n 115:\t\tselect MII\n 116:\t\tselect PHYLINK\n 117:\t\tselect MICROCHIP_PHY\n 118:\t\tselect CRC32\n 119:\t\timply NET_SELFTESTS\n 120:\t\thelp\n 121:\t\t This option adds support for Microchip LAN78XX based USB 2\n 122:\t\t \u0026 USB 3 10/100/1000 Ethernet adapters.\n 123:\t\t LAN7800 : USB 3 to 10/100/1000 Ethernet adapter\n 124:\t\t LAN7850 : USB 2 to 10/100/1000 Ethernet adapter\n 125:\t\t LAN7801 : USB 3 to 10/100/1000 Ethernet adapter (MAC only)\n 126:\t\n 127:\t\t Proper PHY driver is required for LAN7801.\n 128:\t\n 129:\t\t To compile this driver as a module, choose M here: the\n" }
68/2	2026/09/23 16:31	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 43641 output: 32 thoughts: 42 Thoughts: Okay, here's my interpretation of those thoughts, summarized in the first person, assuming the context is my expertise: Diving into the LAN78XX Driver Configuration Right, so `USB_LAN78XX` is defined to also bring in `PHYLINK`. Makes sense, the LAN78XX is typically going to be using an external PHY, so that's expected. Now, I need to understand how `PHYLINK` is being configured in this context. Let's get right into `drivers/net/phy/Kconfig` to see what options and defaults are being set up there. I need to understand this `PHYLINK` configuration to fully grasp how the driver integrates with the physical layer. Knowing this will give me a better understanding of the low-level communication.
69/2	2026/09/23 16:31	tool	grepper	0m Args: { "Expression": "config PHYLINK", "PathPrefix": "drivers/net/phy/Kconfig" } Results: { "Output": "drivers/net/phy/Kconfig-5-\ndrivers/net/phy/Kconfig:6:config PHYLINK\ndrivers/net/phy/Kconfig-7-\ttristate\n" }
70/2	2026/09/23 16:31	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 43941 output: 34 thoughts: 22 Thoughts: Here's my analysis of the provided text, rendered as a first-person expert summary: Analyzing the PHY Kconfig File Okay, let's dive into this. My first thought is to examine the `drivers/net/phy/Kconfig` file, specifically lines 1 to 20. I anticipate this section likely outlines the core configuration options related to the Physical Layer (PHY) interface drivers for network devices. I'm expecting to see definitions related to enabling or disabling PHY driver support as a whole, perhaps some core dependency checks, and potentially the basic configuration options that are always needed regardless of the specific PHY in use. Things like specifying the MII/GMII mode, configuring for different speeds, or setting default address ranges. It is unlikely this will cover any advanced PHY specific functions. This should give a good overview of the generic aspects before any specific PHY is examined. I'm looking for the foundational building blocks of the PHY driver configuration. Let's see what the file reveals.
71/2	2026/09/23 16:31	tool	read-file	0m Args: { "File": "drivers/net/phy/Kconfig", "FirstLine": 1, "LineCount": 20 } Results: { "Contents": " 1:\t# SPDX-License-Identifier: GPL-2.0-only\n 2:\t#\n 3:\t# PHY Layer Configuration\n 4:\t#\n 5:\t\n 6:\tconfig PHYLINK\n 7:\t\ttristate\n 8:\t\tselect PHYLIB\n 9:\t\tselect SWPHY\n 10:\t\thelp\n 11:\t\t PHYlink models the link between the PHY and MAC, allowing fixed\n 12:\t\t configuration links, PHYs, and Serdes links with MAC level\n 13:\t\t autonegotiation modes.\n 14:\t\n 15:\tmenuconfig PHYLIB\n 16:\t\ttristate \"PHY Device support and infrastructure\"\n 17:\t\thelp\n 18:\t\t Ethernet controllers are usually attached to PHY\n 19:\t\t devices. This option provides infrastructure for\n 20:\t\t managing PHY devices.\n" }
72/2	2026/09/23 16:31	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 44439 output: 34 thoughts: 3361 Thoughts: Analyzing a Phylink Patch for Fuzzing Potential Okay, so I'm looking at this patch that seems to touch `phylink` and `stmmac` – interesting. First, the context: `PHYLINK` is a tristate, and various drivers, like `USB_NET_AX8817X` (which uses an `ax88772` PHY), enable it. I know USB devices can be dynamically added and removed in QEMU, which is a key observation for fuzzing. When these USB network devices are plugged in (or emulated), they bind, reset, and start/stop/suspend via `phylink`, creating and managing the physical link. The patch specifically deals with `phylink_stop()`. If `phylink_stop()` gets called when already stopped, or after a suspend, there's new logic to handle cases involving MAC Wake-on-LAN (WoL) and link-down deferrals, now. Specifically, the patch checks `PHYLINK_DISABLE_STOPPED` and `PHYLINK_DISABLE_MAC_WOL` bits and modifies `phylink_stop()` to potentially skip certain steps (like calling `phylink_link_down`) if the link is already down or MAC WoL is active. My initial thought was that stmmac isn't reachable, and therefore, not interesting for fuzzing. However, this patch touches `phylink`. I checked syzkaller configs and QEMU setups to see if `stmmac` is enabled, and if there are any `stmmac` emulations. It looks like it is not present in standard builds, unless there's an emulated PCI device. Since QEMU doesn't have an emulated stmmac PCI device, I almost dismissed it. Then I carefully re-read the patch, and specifically the comment "It may also be called after phylink_suspend() if the MAC cannot resume and the network device must be closed instead." This is the key. The patch affects `phylink_stop()`, which is called when an `stmmac` device fails to resume, or is being closed. This is called in `stmmac_resume()` path when `netif_close()` calls `stmmac_release()`, which, crucially, calls `phylink_stop()`. Previously, `phylink_stop()` didn't properly handle the state after a `phylink_suspend()`. So, even though stmmac is not easily reachable, it's the phylink part that makes this interesting. Now, let's determine if this patch warrants fuzzing. The key criteria is reachability. The rule is: only if all modified code falls into the negative criteria, it's not fuzzed. `phylink.c` is not an unreachable device, or vendor-specific ASIC driver, but is a core subsystem used by drivers reachable in QEMU via USB. `ax88772` and `lan78xx` USB devices do use `phylink`, and are emulatable via raw USB gadget. The user-space (syzkaller) can trigger `phylink_stop()` via interface up/down commands, power management/suspend/resume events, ethtool commands, and disconnection. The new logic in `phylink_stop()` includes: checking `PHYLINK_DISABLE_STOPPED`, and `PHYLINK_DISABLE_MAC_WOL`, and skipping or handling link down steps differently, which could introduce subtle bugs, race conditions, or even deadlocks. The `flush_work(&pl->resolve)` warrants further inspection. The work handler `phylink_resolve` needs checking. The `ASSERT_RTNL()` calls are also crucial context for this analysis. Therefore, this patch has the potential to introduce bugs in reachable code paths and should be fuzzed.
73/2	2026/09/23 16:32	tool	grepper	0m Args: { "Expression": "phylink_resolve", "PathPrefix": "drivers/net/phy/phylink.c" } Results: { "Output": "drivers/net/phy/phylink.c=41=struct phylink {\n--\ndrivers/net/phy/phylink.c-70-\tstruct mutex state_mutex;\ndrivers/net/phy/phylink.c:71:\t/* Serialize updates to pl-\u003ephydev with phylink_resolve() /\ndrivers/net/phy/phylink.c-72-\tstruct mutex phydev_mutex;\n--\ndrivers/net/phy/phylink.c=853=static void phylink_apply_manual_flow(struct phylink pl,\n--\ndrivers/net/phy/phylink.c-865-\ndrivers/net/phy/phylink.c:866:static void phylink_resolve_an_pause(struct phylink_link_state state)\ndrivers/net/phy/phylink.c-867-{\n--\ndrivers/net/phy/phylink.c=1441=static void phylink_get_fixed_state(struct phylink pl,\n--\ndrivers/net/phy/phylink.c-1450-\tstate-\u003epause = MLO_PAUSE_NONE;\ndrivers/net/phy/phylink.c:1451:\tphylink_resolve_an_pause(state);\ndrivers/net/phy/phylink.c-1452-}\n--\ndrivers/net/phy/phylink.c=1610=static bool phylink_link_is_up(struct phylink pl)\n--\ndrivers/net/phy/phylink.c-1614-\ndrivers/net/phy/phylink.c:1615:static void phylink_resolve(struct work_struct w)\ndrivers/net/phy/phylink.c-1616-{\n--\ndrivers/net/phy/phylink.c=1850=struct phylink phylink_create(struct phylink_config config,\n--\ndrivers/net/phy/phylink.c-1870-\tmutex_init(\u0026pl-\u003estate_mutex);\ndrivers/net/phy/phylink.c:1871:\tINIT_WORK(\u0026pl-\u003eresolve, phylink_resolve);\ndrivers/net/phy/phylink.c-1872-\n--\ndrivers/net/phy/phylink.c=2629=void phylink_suspend(struct phylink pl, bool mac_wol)\n--\ndrivers/net/phy/phylink.c-2646-\t\t\t but one would hope all packets have been sent. This\ndrivers/net/phy/phylink.c:2647:\t\t\t * also means phylink_resolve() will do nothing.\ndrivers/net/phy/phylink.c-2648-\t\t\t /\n--\ndrivers/net/phy/phylink.c=3984=static struct {\n--\ndrivers/net/phy/phylink.c-3999-\ndrivers/net/phy/phylink.c:4000:void phylink_resolve_c73(struct phylink_link_state state)\ndrivers/net/phy/phylink.c-4001-{\n--\ndrivers/net/phy/phylink.c-4018-\ndrivers/net/phy/phylink.c:4019:\tphylink_resolve_an_pause(state);\ndrivers/net/phy/phylink.c-4020-}\ndrivers/net/phy/phylink.c:4021:EXPORT_SYMBOL_GPL(phylink_resolve_c73);\ndrivers/net/phy/phylink.c-4022-\ndrivers/net/phy/phylink.c=4023=static void phylink_decode_c37_word(struct phylink_link_state *state,\n--\ndrivers/net/phy/phylink.c-4043-\ndrivers/net/phy/phylink.c:4044:\tphylink_resolve_an_pause(state);\ndrivers/net/phy/phylink.c-4045-}\n" }
74/2	2026/09/23 16:32	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 49658 output: 39 thoughts: 10 Thoughts: Okay, here's my interpretation of "Let's read `phylink_resolve`" as a thought process, tailored for an expert audience: Diving into `phylink_resolve` Alright, let's get down to brass tacks. The mental checklist begins: `phylink_resolve`. It's time to dissect this. My immediate thought is, "What's the context?" Am I thinking of it in terms of a specific project, a theoretical exploration of link resolution strategies, or maybe debugging a particular issue? Knowing the surrounding ecosystem is paramount to efficient understanding. I'm already anticipating the typical challenges: potential ambiguities in the input phylink, the impact of various error handling approaches, and of course the interplay with different data storage and retrieval systems. The specific implementation details are going to be key here. Do they leverage any clever caching mechanisms? Is it optimized for specific data types or access patterns? What about concurrency? My mind is already running through potential pitfalls. Are there edge cases that the documentation might gloss over? Any sneaky dependencies I need to be aware of? I'll probably be scrutinizing the code for any potential vulnerabilities, especially if it's handling user input or external data. The real meat of the analysis, however, lies in how the resolution process is orchestrated. Does `phylink_resolve` use a series of transformations, recursive calls, or a more graph-oriented approach? I'll need to understand the underlying algorithm to accurately assess its performance characteristics. Also, what sort of logging and debugging information is provided? That will be critical when something inevitably goes sideways. Let's dig in.
75/2	2026/09/23 16:32	tool	read-file	0m Args: { "File": "drivers/net/phy/phylink.c", "FirstLine": 1615, "LineCount": 50 } Results: { "Contents": "1615:\tstatic void phylink_resolve(struct work_struct w)\n1616:\t{\n1617:\t\tstruct phylink pl = container_of(w, struct phylink, resolve);\n1618:\t\tstruct phylink_link_state link_state;\n1619:\t\tbool mac_config = false;\n1620:\t\tbool retrigger = false;\n1621:\t\tstruct phy_device phy;\n1622:\t\tbool cur_link_state;\n1623:\t\n1624:\t\tmutex_lock(\u0026pl-\u003ephydev_mutex);\n1625:\t\tphy = pl-\u003ephydev;\n1626:\t\tif (phy)\n1627:\t\t\tmutex_lock(\u0026phy-\u003elock);\n1628:\t\tmutex_lock(\u0026pl-\u003estate_mutex);\n1629:\t\tcur_link_state = phylink_link_is_up(pl);\n1630:\t\n1631:\t\tif (pl-\u003ephylink_disable_state) {\n1632:\t\t\tpl-\u003elink_failed = false;\n1633:\t\t\tlink_state = pl-\u003elink_config;\n1634:\t\t\tlink_state.link = false;\n1635:\t\t} else if (pl-\u003elink_failed) {\n1636:\t\t\tlink_state = pl-\u003elink_config;\n1637:\t\t\tlink_state.link = false;\n1638:\t\t\tretrigger = true;\n1639:\t\t} else if (pl-\u003eact_link_an_mode == MLO_AN_FIXED) {\n1640:\t\t\tphylink_get_fixed_state(pl, \u0026link_state);\n1641:\t\t\tmac_config = link_state.link;\n1642:\t\t} else if (pl-\u003eact_link_an_mode == MLO_AN_PHY) {\n1643:\t\t\tlink_state = pl-\u003ephy_state;\n1644:\t\t\tmac_config = link_state.link;\n1645:\t\t} else {\n1646:\t\t\tphylink_mac_pcs_get_state(pl, \u0026link_state);\n1647:\t\n1648:\t\t\t/ The PCS may have a latching link-fail indicator. If the link\n1649:\t\t\t * was up, bring the link down and re-trigger the resolve.\n1650:\t\t\t * Otherwise, re-read the PCS state to get the current status\n1651:\t\t\t * of the link.\n1652:\t\t\t /\n1653:\t\t\tif (!link_state.link) {\n1654:\t\t\t\tif (cur_link_state)\n1655:\t\t\t\t\tretrigger = true;\n1656:\t\t\t\telse\n1657:\t\t\t\t\tphylink_mac_pcs_get_state(pl, \u0026link_state);\n1658:\t\t\t}\n1659:\t\n1660:\t\t\t/ If we have a phy, the \"up\" state is the union of both the\n1661:\t\t\t * PHY and the MAC\n1662:\t\t\t */\n1663:\t\t\tif (phy)\n1664:\t\t\t\tlink_state.link \u0026= pl-\u003ephy_state.link;\n" }
76/2	2026/09/23 16:32	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 50861 output: 39 thoughts: 123 Thoughts: Okay, let's dive into this `phylink_resolve` situation and see if we have a locking issue or potential for a deadlock. I need to refresh my memory on the mutexes involved, specifically: `phydev_mutex`, `phy->lock`, and `state_mutex`. Those are the usual suspects in this area. Now, the main concern here is `phylink_stop()`. I know that function calls `flush_work(&pl->resolve)`, and that happens while holding `RTNL`, given the `ASSERT_RTNL()` call. My immediate question is: does `phylink_resolve()` also acquire `RTNL`? That's the crux of the matter. If it does, we have a clear potential for a deadlock if the lock order isn't correct, or if there's a circular dependency. To get a clearer picture of the code path in `phylink_resolve`, I need to scrutinize it thoroughly. I'll need to look closely at lines 1665 to 1750 of that function to ensure I have a complete understanding of the locking order and other functions that are invoked. That's where I will find the answer.
77/2	2026/09/23 16:32	tool	read-file	0m Args: { "File": "drivers/net/phy/phylink.c", "FirstLine": 1665, "LineCount": 85 } Results: { "Contents": "1665:\t\n1666:\t\t\t/* Only update if the PHY link is up /\n1667:\t\t\tif (phy \u0026\u0026 pl-\u003ephy_state.link) {\n1668:\t\t\t\t/ If the interface has changed, force a link down\n1669:\t\t\t\t * event if the link isn't already down, and re-resolve.\n1670:\t\t\t\t /\n1671:\t\t\t\tif (link_state.interface != pl-\u003ephy_state.interface) {\n1672:\t\t\t\t\tretrigger = true;\n1673:\t\t\t\t\tlink_state.link = false;\n1674:\t\t\t\t}\n1675:\t\n1676:\t\t\t\tlink_state.interface = pl-\u003ephy_state.interface;\n1677:\t\n1678:\t\t\t\t/ If we are doing rate matching, then the link\n1679:\t\t\t\t * speed/duplex comes from the PHY\n1680:\t\t\t\t /\n1681:\t\t\t\tif (pl-\u003ephy_state.rate_matching) {\n1682:\t\t\t\t\tlink_state.rate_matching =\n1683:\t\t\t\t\t\tpl-\u003ephy_state.rate_matching;\n1684:\t\t\t\t\tlink_state.speed = pl-\u003ephy_state.speed;\n1685:\t\t\t\t\tlink_state.duplex = pl-\u003ephy_state.duplex;\n1686:\t\t\t\t}\n1687:\t\n1688:\t\t\t\t/ If we have a PHY, we need to update with the PHY\n1689:\t\t\t\t * flow control bits.\n1690:\t\t\t\t /\n1691:\t\t\t\tlink_state.pause = pl-\u003ephy_state.pause;\n1692:\t\t\t\tmac_config = true;\n1693:\t\t\t}\n1694:\t\t}\n1695:\t\n1696:\t\tif (pl-\u003eact_link_an_mode != MLO_AN_FIXED)\n1697:\t\t\tphylink_apply_manual_flow(pl, \u0026link_state);\n1698:\t\n1699:\t\tif ((mac_config \u0026\u0026 link_state.interface != pl-\u003elink_config.interface) \|\|\n1700:\t\t pl-\u003eforce_major_config) {\n1701:\t\t\t/ The interface has changed or a forced major configuration\n1702:\t\t\t * was requested, so force the link down and then reconfigure.\n1703:\t\t\t /\n1704:\t\t\tif (cur_link_state) {\n1705:\t\t\t\tphylink_link_down(pl);\n1706:\t\t\t\tcur_link_state = false;\n1707:\t\t\t}\n1708:\t\t\tphylink_major_config(pl, false, \u0026link_state);\n1709:\t\t\tpl-\u003elink_config.interface = link_state.interface;\n1710:\t\t\tpl-\u003eforce_major_config = false;\n1711:\t\t}\n1712:\t\n1713:\t\t/ If configuration of the interface failed, force the link down\n1714:\t\t * until we get a successful configuration.\n1715:\t\t /\n1716:\t\tif (pl-\u003emajor_config_failed)\n1717:\t\t\tlink_state.link = false;\n1718:\t\n1719:\t\tif (link_state.link != cur_link_state) {\n1720:\t\t\tpl-\u003eold_link_state = link_state.link;\n1721:\t\t\tif (!link_state.link)\n1722:\t\t\t\tphylink_link_down(pl);\n1723:\t\t\telse\n1724:\t\t\t\tphylink_link_up(pl, link_state);\n1725:\t\t}\n1726:\t\tif (!link_state.link \u0026\u0026 retrigger) {\n1727:\t\t\tpl-\u003elink_failed = false;\n1728:\t\t\tqueue_work(system_power_efficient_wq, \u0026pl-\u003eresolve);\n1729:\t\t}\n1730:\t\tmutex_unlock(\u0026pl-\u003estate_mutex);\n1731:\t\tif (phy)\n1732:\t\t\tmutex_unlock(\u0026phy-\u003elock);\n1733:\t\tmutex_unlock(\u0026pl-\u003ephydev_mutex);\n1734:\t}\n1735:\t\n1736:\tstatic void phylink_run_resolve(struct phylink pl)\n1737:\t{\n1738:\t\tif (!pl-\u003ephylink_disable_state)\n1739:\t\t\tqueue_work(system_power_efficient_wq, \u0026pl-\u003eresolve);\n1740:\t}\n1741:\t\n1742:\tstatic void phylink_run_resolve_and_disable(struct phylink *pl, int bit)\n1743:\t{\n1744:\t\tunsigned long state = pl-\u003ephylink_disable_state;\n1745:\t\n1746:\t\tset_bit(bit, \u0026pl-\u003ephylink_disable_state);\n1747:\t\tif (state == 0) {\n1748:\t\t\tqueue_work(system_power_efficient_wq, \u0026pl-\u003eresolve);\n1749:\t\t\tflush_work(\u0026pl-\u003eresolve);\n" }
78/2	2026/09/23 16:32	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 52568 output: 18 thoughts: 2677 Thoughts: Analysis of `phylink_stop` Reachability and Fuzzing Strategy Okay, so I've been presented with some code modifications in `phylink_stop` and need to determine the optimal fuzzing strategy. First, I see the code implements logic related to disabling MAC WoL and handling link-down scenarios. The presence of `test_bit` and mutexes immediately raises flags – always potential areas for concurrency issues or incorrect state management. The initial question is whether this code is even reachable in a standard fuzzing environment. I see references to virtualized environments, USB gadget emulation, and netdev lifecycle and DSA. Crucially, I recall that `asix_devices.c` and `lan78xx.c` both use `phylink` and, as a result, call `phylink_stop()`. That is very promising. Syzkaller's USB raw gadget functionality can emulate these devices, and fuzzing netlink commands, `SIOCSIFFLAGS`, etc., can trigger `phylink_stop` through interface bring-down or device disconnect scenarios. I'm checking if it's reachable without USB. My initial thought is DSA and other virtual netdevs. The fact that the code is reachable through USB means I've already answered the most important question. I will be looking to confirm this in other ways. Now, let's apply the triage philosophy. Section 1 emphasizes reachability. Since the code is reachable through USB gadget emulation (a standard QEMU environment), it must be fuzzed. I am not going to blindly trust the assumption of "no functional change" either. Negative criteria (Section 2) are not met. The changes aren't non-kernel, structural hardware, or unreachable teardown paths. Section 3 confirms that this is positive criteria. It touches reachable executable code accessible through virtual buses. This confirms my belief that the code should be fuzzed. Now, the critical part: extracting `FocusSymbols` to guide the fuzzer (Section 4). I want to prevent dilution of the fuzzing effort. Since `phylink_stop` is a clearly defined, exported function (`EXPORT_SYMBOL_GPL(phylink_stop)`) in `phylink.c`, that's an obvious candidate. It is definitely not a ubiquitous lifecycle function; it's specific to the phylink subsystem and its stop/disable process. I also need to think if there are related functions. I look at what calls `phylink_stop()`. I see `phylink_suspend` and other drivers. `phylink_suspend` is clearly a direct interaction point for the new code. I'm now certain that `phylink_stop` and `phylink_suspend` should be added to `FocusSymbols`. I consider other functions like `stmmac_resume` and `stmmac_change_mtu` (from the `stmmac` driver) listed. Although this is another potential entrypoint, I should not pollute `FocusSymbols` with functions that might only be reachable in a non-standard environment. The key here is not to cause too many false positives! Static functions don't usually qualify, but it depends on compiler optimizations. Static functions would be inlined and wouldn't have their own symbol entries. If stmmac isn't instantiable in standard QEMU, then including these could cause the fuzzer to waste effort. Therefore, I will not add these functions to `FocusSymbols`. Finally, identifying `EnableConfigs` (Section 5). I check the `phylink` Kconfig files. `PHYLINK` itself is a tristate, selected by other configs, not directly configurable. Given all of this information, my recommendation is to set `WorthFuzzing=true` and include `phylink_stop` and `phylink_suspend` in `FocusSymbols`.
79/2	2026/09/23 16:32	tool	grepper	0m Args: { "Expression": "select PHYLINK" } Results: { "Output": "Documentation/networking/sfp-phylink.rst=74=this documentation.\n--\nDocumentation/networking/sfp-phylink.rst-91-\nDocumentation/networking/sfp-phylink.rst:92:\tselect PHYLINK\nDocumentation/networking/sfp-phylink.rst-93-\n--\ndrivers/net/ethernet/altera/Kconfig=2=config ALTERA_TSE\n--\ndrivers/net/ethernet/altera/Kconfig-6-\tselect PHYLIB\ndrivers/net/ethernet/altera/Kconfig:7:\tselect PHYLINK\ndrivers/net/ethernet/altera/Kconfig-8-\tselect PCS_LYNX\n--\ndrivers/net/ethernet/atheros/Kconfig=20=config AG71XX\n--\ndrivers/net/ethernet/atheros/Kconfig-22-\tdepends on ATH79 \|\| COMPILE_TEST\ndrivers/net/ethernet/atheros/Kconfig:23:\tselect PHYLINK\ndrivers/net/ethernet/atheros/Kconfig-24-\timply NET_SELFTESTS\n--\ndrivers/net/ethernet/cadence/Kconfig=22=config MACB\n--\ndrivers/net/ethernet/cadence/Kconfig-25-\tdepends on PTP_1588_CLOCK_OPTIONAL\ndrivers/net/ethernet/cadence/Kconfig:26:\tselect PHYLINK\ndrivers/net/ethernet/cadence/Kconfig-27-\tselect CRC32\n--\ndrivers/net/ethernet/freescale/Kconfig=80=config UCC_GETH\n--\ndrivers/net/ethernet/freescale/Kconfig-83-\tselect FSL_PQ_MDIO\ndrivers/net/ethernet/freescale/Kconfig:84:\tselect PHYLINK\ndrivers/net/ethernet/freescale/Kconfig-85-\thelp\n--\ndrivers/net/ethernet/freescale/dpaa/Kconfig=2=menuconfig FSL_DPAA_ETH\n--\ndrivers/net/ethernet/freescale/dpaa/Kconfig-4-\tdepends on FSL_DPAA \u0026\u0026 FSL_FMAN\ndrivers/net/ethernet/freescale/dpaa/Kconfig:5:\tselect PHYLINK\ndrivers/net/ethernet/freescale/dpaa/Kconfig-6-\tselect PCS_LYNX\n--\ndrivers/net/ethernet/freescale/dpaa2/Kconfig=2=config FSL_DPAA2_ETH\n--\ndrivers/net/ethernet/freescale/dpaa2/Kconfig-4-\tdepends on FSL_MC_BUS \u0026\u0026 FSL_MC_DPIO\ndrivers/net/ethernet/freescale/dpaa2/Kconfig:5:\tselect PHYLINK\ndrivers/net/ethernet/freescale/dpaa2/Kconfig-6-\tselect PCS_LYNX\n--\ndrivers/net/ethernet/freescale/dpaa2/Kconfig=33=config FSL_DPAA2_SWITCH\n--\ndrivers/net/ethernet/freescale/dpaa2/Kconfig-37-\tdepends on FSL_MC_BUS \u0026\u0026 FSL_MC_DPIO\ndrivers/net/ethernet/freescale/dpaa2/Kconfig:38:\tselect PHYLINK\ndrivers/net/ethernet/freescale/dpaa2/Kconfig-39-\tselect PCS_LYNX\n--\ndrivers/net/ethernet/freescale/enetc/Kconfig=30=config FSL_ENETC\n--\ndrivers/net/ethernet/freescale/enetc/Kconfig-37-\tselect NXP_ENETC_PF_COMMON\ndrivers/net/ethernet/freescale/enetc/Kconfig:38:\tselect PHYLINK\ndrivers/net/ethernet/freescale/enetc/Kconfig-39-\tselect PCS_LYNX\n--\ndrivers/net/ethernet/freescale/enetc/Kconfig=48=config NXP_ENETC4\n--\ndrivers/net/ethernet/freescale/enetc/Kconfig-55-\tselect NXP_NTMP\ndrivers/net/ethernet/freescale/enetc/Kconfig:56:\tselect PHYLINK\ndrivers/net/ethernet/freescale/enetc/Kconfig-57-\tselect DIMLIB\n--\ndrivers/net/ethernet/freescale/enetc/Kconfig=66=config FSL_ENETC_VF\n--\ndrivers/net/ethernet/freescale/enetc/Kconfig-71-\tselect FSL_ENETC_MDIO\ndrivers/net/ethernet/freescale/enetc/Kconfig:72:\tselect PHYLINK\ndrivers/net/ethernet/freescale/enetc/Kconfig-73-\tselect DIMLIB\n--\ndrivers/net/ethernet/freescale/fman/Kconfig=2=config FSL_FMAN\n--\ndrivers/net/ethernet/freescale/fman/Kconfig-5-\tselect GENERIC_ALLOCATOR\ndrivers/net/ethernet/freescale/fman/Kconfig:6:\tselect PHYLINK\ndrivers/net/ethernet/freescale/fman/Kconfig-7-\tselect PCS_LYNX\n--\ndrivers/net/ethernet/freescale/fs_enet/Kconfig=2=config FS_ENET\n--\ndrivers/net/ethernet/freescale/fs_enet/Kconfig-5-\tselect MII\ndrivers/net/ethernet/freescale/fs_enet/Kconfig:6:\tselect PHYLINK\ndrivers/net/ethernet/freescale/fs_enet/Kconfig-7-\n--\ndrivers/net/ethernet/marvell/Kconfig=59=config MVNETA\n--\ndrivers/net/ethernet/marvell/Kconfig-62-\tselect MVMDIO\ndrivers/net/ethernet/marvell/Kconfig:63:\tselect PHYLINK\ndrivers/net/ethernet/marvell/Kconfig-64-\tselect PAGE_POOL\n--\ndrivers/net/ethernet/marvell/Kconfig=86=config MVPP2\n--\ndrivers/net/ethernet/marvell/Kconfig-89-\tselect MVMDIO\ndrivers/net/ethernet/marvell/Kconfig:90:\tselect PHYLINK\ndrivers/net/ethernet/marvell/Kconfig-91-\tselect PAGE_POOL\n--\ndrivers/net/ethernet/marvell/prestera/Kconfig=6=config PRESTERA\n--\ndrivers/net/ethernet/marvell/prestera/Kconfig-10-\tselect NET_DEVLINK\ndrivers/net/ethernet/marvell/prestera/Kconfig:11:\tselect PHYLINK\ndrivers/net/ethernet/marvell/prestera/Kconfig-12-\thelp\n--\ndrivers/net/ethernet/mediatek/Kconfig=14=config NET_MEDIATEK_SOC\n--\ndrivers/net/ethernet/mediatek/Kconfig-17-\tselect PINCTRL\ndrivers/net/ethernet/mediatek/Kconfig:18:\tselect PHYLINK\ndrivers/net/ethernet/mediatek/Kconfig-19-\tselect DIMLIB\n--\ndrivers/net/ethernet/meta/Kconfig=20=config FBNIC\n--\ndrivers/net/ethernet/meta/Kconfig-29-\tselect PCS_XPCS\ndrivers/net/ethernet/meta/Kconfig:30:\tselect PHYLINK\ndrivers/net/ethernet/meta/Kconfig-31-\tselect PLDMFW\n--\ndrivers/net/ethernet/microchip/Kconfig=45=config LAN743X\n--\ndrivers/net/ethernet/microchip/Kconfig-51-\tselect CRC32\ndrivers/net/ethernet/microchip/Kconfig:52:\tselect PHYLINK\ndrivers/net/ethernet/microchip/Kconfig-53-\thelp\n--\ndrivers/net/ethernet/microchip/lan966x/Kconfig=1=config LAN966X_SWITCH\n--\ndrivers/net/ethernet/microchip/lan966x/Kconfig-7-\tdepends on BRIDGE \|\| BRIDGE=n\ndrivers/net/ethernet/microchip/lan966x/Kconfig:8:\tselect PHYLINK\ndrivers/net/ethernet/microchip/lan966x/Kconfig-9-\tselect PAGE_POOL\n--\ndrivers/net/ethernet/microchip/sparx5/Kconfig=1=config SPARX5_SWITCH\n--\ndrivers/net/ethernet/microchip/sparx5/Kconfig-8-\tdepends on BRIDGE \|\| BRIDGE=n\ndrivers/net/ethernet/microchip/sparx5/Kconfig:9:\tselect PHYLINK\ndrivers/net/ethernet/microchip/sparx5/Kconfig-10-\tselect PHY_SPARX5_SERDES\n--\ndrivers/net/ethernet/mscc/Kconfig=15=config MSCC_OCELOT_SWITCH_LIB\n--\ndrivers/net/ethernet/mscc/Kconfig-19-\tselect PACKING\ndrivers/net/ethernet/mscc/Kconfig:20:\tselect PHYLINK\ndrivers/net/ethernet/mscc/Kconfig-21-\ttristate\n--\ndrivers/net/ethernet/renesas/Kconfig=42=config RENESAS_ETHER_SWITCH\n--\ndrivers/net/ethernet/renesas/Kconfig-47-\tselect MII\ndrivers/net/ethernet/renesas/Kconfig:48:\tselect PHYLINK\ndrivers/net/ethernet/renesas/Kconfig-49-\tselect RENESAS_GEN4_PTP\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig=2=config STMMAC_ETH\n--\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-9-\tselect PAGE_POOL\ndrivers/net/ethernet/stmicro/stmmac/Kconfig:10:\tselect PHYLINK\ndrivers/net/ethernet/stmicro/stmmac/Kconfig-11-\tselect CRC32\n--\ndrivers/net/ethernet/tehuti/Kconfig=26=config TEHUTI_TN40\n--\ndrivers/net/ethernet/tehuti/Kconfig-30-\tselect FW_LOADER\ndrivers/net/ethernet/tehuti/Kconfig:31:\tselect PHYLINK\ndrivers/net/ethernet/tehuti/Kconfig-32-\thelp\n--\ndrivers/net/ethernet/ti/Kconfig=96=config TI_K3_AM65_CPSW_NUSS\n--\ndrivers/net/ethernet/ti/Kconfig-100-\tselect TI_DAVINCI_MDIO\ndrivers/net/ethernet/ti/Kconfig:101:\tselect PHYLINK\ndrivers/net/ethernet/ti/Kconfig-102-\tselect PAGE_POOL\n--\ndrivers/net/ethernet/wangxun/Kconfig=19=config LIBWX\n--\ndrivers/net/ethernet/wangxun/Kconfig-23-\tselect DIMLIB\ndrivers/net/ethernet/wangxun/Kconfig:24:\tselect PHYLINK\ndrivers/net/ethernet/wangxun/Kconfig-25-\thelp\n--\ndrivers/net/ethernet/xilinx/Kconfig=26=config XILINX_AXI_EMAC\n--\ndrivers/net/ethernet/xilinx/Kconfig-29-\tdepends on XILINX_DMA\ndrivers/net/ethernet/xilinx/Kconfig:30:\tselect PHYLINK\ndrivers/net/ethernet/xilinx/Kconfig-31-\tselect DIMLIB\n--\ndrivers/net/pcs/Kconfig=8=config PCS_XPCS\ndrivers/net/pcs/Kconfig-9-\ttristate \"Synopsys DesignWare Ethernet XPCS\"\ndrivers/net/pcs/Kconfig:10:\tselect PHYLINK\ndrivers/net/pcs/Kconfig-11-\thelp\n--\ndrivers/net/usb/Kconfig=113=config USB_LAN78XX\n--\ndrivers/net/usb/Kconfig-115-\tselect MII\ndrivers/net/usb/Kconfig:116:\tselect PHYLINK\ndrivers/net/usb/Kconfig-117-\tselect MICROCHIP_PHY\n--\ndrivers/net/usb/Kconfig=166=config USB_NET_AX8817X\n--\ndrivers/net/usb/Kconfig-169-\tselect CRC32\ndrivers/net/usb/Kconfig:170:\tselect PHYLINK\ndrivers/net/usb/Kconfig-171-\tselect AX88796B_PHY\n--\nnet/dsa/Kconfig=3=menuconfig NET_DSA\n--\nnet/dsa/Kconfig-9-\tselect NET_SWITCHDEV\nnet/dsa/Kconfig:10:\tselect PHYLINK\nnet/dsa/Kconfig-11-\tselect NET_DEVLINK\n" }
80/2	2026/09/23 16:32	llm	patch-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 59299 output: 270 thoughts: 1463 Thoughts: Analysis of PHYLink and STMMAC for Fuzzing Okay, let's break this down. First, I need to figure out the relevant configuration options that enable `PHYLINK`. The initial scan shows that `PHYLINK` is selected by several drivers: `USB_NET_AX8817X`, `USB_LAN78XX`, `NET_DSA`, `STMMAC_ETH`, and some others. So, enabling `PHYLINK` is key. Now, specifically looking at `STMMAC_ETH`, its Kconfig file confirms the `select PHYLINK` statement, along with other dependencies like `MII`, `PCS_XPCS`, `PAGE_POOL`, and `CRC32`. `STMMAC_PCI` depends on `STMMAC_ETH` and `PCI`, and `DWMAC_INTEL` does the same if we are on x86. For USB, `USB_USBNET` is a prerequisite for `USB_NET_AX8817X` which in turn selects `PHYLINK`, and the same goes for `USB_LAN78XX`. Therefore, the configs I'll need to enable are: `PHYLINK`, either `USB_NET_AX8817X` or `USB_LAN78XX`, or `STMMAC_ETH`, along with `USB_NET_DRIVERS`, and `USB_USBNET`, and either `STMMAC_PCI` or `DWMAC_INTEL`, depending on the target architecture which is amd64. Now for the `FocusSymbols`. I need to pinpoint the specific functions modified in the relevant source files. The analysis points to `phylink_stop` and `phylink_suspend` in `phylink.c`, and `stmmac_resume` and `stmmac_change_mtu` in `stmmac_main.c`. However, I need to verify which of these symbols are actually exported or accessible. I see that `stmmac_change_mtu` is static. Likewise `__stmmac_open`, `__stmmac_release`, and `stmmac_release` are static in the same file. However, `stmmac_resume` is exported via `EXPORT_SYMBOL_GPL`. And, both `phylink_stop` and `phylink_suspend` are also explicitly exported. I also need to see if any other symbols have been modified. In `stmmac.h`, there's a change to the `struct stmmac_priv` with the addition of the `opened` field. `phylink.c` contains `phylink_stop` and `phylink_suspend` which are exported. This confirms that these functions are distinct and accessible. To summarize, my `FocusSymbols` will be `phylink_stop`, `phylink_suspend`, and `stmmac_resume`. The changes appear reachable. The code in `phylink.c` is core network link-state infrastructure, utilized by USB network drivers (like `asix` and `lan78xx`). These can be emulated using a USB Raw Gadget in QEMU. The changes in `phylink_stop()` affect state handling when an interface is stopped after suspend/WoL. STMMAC changes modify MTU reconfiguration and suspend/resume error recovery. Therefore, I have everything needed. I'm ready to proceed.
81/2	2026/09/23 16:33	tool	set-results	0m Args: { "EnableConfigs": [ "PHYLINK", "USB_NET_AX8817X", "USB_LAN78XX", "USB_USBNET", "STMMAC_ETH" ], "FocusSymbols": [ "phylink_stop", "phylink_suspend", "stmmac_resume" ], "Reasoning": "The patch modifies phylink_stop() in drivers/net/phy/phylink.c, introducing new state checks (PHYLINK_DISABLE_STOPPED) and link teardown logic for Wake-on-LAN deferred down states (PHYLINK_DISABLE_MAC_WOL), including workqueue flushing and mutex synchronization under RTNL. Phylink is generic link-management infrastructure used by reachable network device drivers, including USB network adapters (e.g. asix, lan78xx) that are emulated and fuzzed via USB Raw Gadget in standard QEMU virtualized environments. The patch also modifies data-path lifecycle and error recovery paths in the STMMAC driver (stmmac_resume, MTU reconfiguration). Because reachable networking code with modified control flow and state management is touched, this patch warrants fuzzing.", "WorthFuzzing": true } Results: { "EnableConfigs": [ "PHYLINK", "USB_NET_AX8817X", "USB_LAN78XX", "USB_USBNET", "STMMAC_ETH" ], "FocusSymbols": [ "phylink_stop", "phylink_suspend", "stmmac_resume" ], "Reasoning": "The patch modifies phylink_stop() in drivers/net/phy/phylink.c, introducing new state checks (PHYLINK_DISABLE_STOPPED) and link teardown logic for Wake-on-LAN deferred down states (PHYLINK_DISABLE_MAC_WOL), including workqueue flushing and mutex synchronization under RTNL. Phylink is generic link-management infrastructure used by reachable network device drivers, including USB network adapters (e.g. asix, lan78xx) that are emulated and fuzzed via USB Raw Gadget in standard QEMU virtualized environments. The patch also modifies data-path lifecycle and error recovery paths in the STMMAC driver (stmmac_resume, MTU reconfiguration). Because reachable networking code with modified control flow and state management is touched, this patch warrants fuzzing.", "WorthFuzzing": true }
82/1	2026/09/23 16:33	action	If	2m Args: { "WorthFuzzing": true } Results: null
83/2	2026/09/23 16:33	agent	kmsan-evaluator	2m Model: core Args: null Results: { "KMSANReasoning": "The patch series modifies the STMicroelectronics Ethernet driver (`stmmac`) and `phylink` to improve teardown and error handling during MTU changes and hardware resume failures. Specifically, it tracks interface open state with a new `bool opened` flag in `struct stmmac_priv`, prevents double-disabling of queues/NAPI during error recovery, and handles deferred link-down in `phylink_stop()`.\n\nThe new field `opened` resides in `struct stmmac_priv`, which is allocated using `devm_alloc_etherdev_mqs()` (which zero-initializes the private netdev memory). There are no uninitialized variables, structures, or paddings introduced or read. The changes do not involve copying data to user space, netlink messaging, ioctls, or buffer length calculations. Any potential bugs in these control-flow and error-cleanup paths (such as use-after-free, double frees, or locking issues) are detected by standard KASAN and LOCKDEP builds rather than KMSAN. Therefore, a dedicated KMSAN fuzzing session is not warranted.", "NeedsKMSAN": false } Instruction: You are an expert Linux kernel security engineer specializing in kernel memory error detectors (KASAN and KMSAN). Your job is to review the provided patch series and determine if the code changes justify spawning a dedicated KMSAN (KernelMemorySanitizer) fuzzing session in addition to standard KASAN fuzzing. CRITICAL DISTINCTION BETWEEN KASAN AND KMSAN: - Standard KASAN kernel builds (upstream-apparmor-kasan.config) already enable a comprehensive suite of debugging tools and sanitizers, including KASAN (out-of-bounds accesses, use-after-free, double free, invalid free), LOCKDEP (locking bugs and deadlocks), UB-sanitizers, and memory corruption checks. - KMSAN (KernelMemorySanitizer) detects reads of UNINITIALIZED memory (stack, heap, or page allocations) and kernel-to-user memory info-leaks. Rule: THERE IS NO SENSE IN RUNNING A KMSAN SESSION IF A BUG CAN BE CAUGHT BY KASAN, LOCKDEP, OR OTHER STANDARD BUG DETECTORS. A dedicated KMSAN fuzzing session incurs significant resource costs. You must ONLY set NeedsKMSAN=true if the code changes introduce or expose UNINITIALIZED MEMORY risks that are detected ONLY by KMSAN. Look holistically at the patch series and surrounding code. Even if no direct uninitialized field accesses or new buffer allocations are added in the diff itself, a patch may alter control flow, bounds checking, or data length calculations in ways that change how the rest of the code operates on existing buffers (e.g. allowing uninitialized stack/heap memory to be read, copied to user space, or used in control flow). Do not hesitate to use your code access tools to inspect the surrounding code, called functions, and callers. Set NeedsKMSAN=true ONLY IF the patch introduces or modifies: 1. Kernel structures sent to user space (via copy_to_user, put_user, netlink skb attributes, ioctl output arguments, socket options, or BPF buffers) where fields or structure padding might not be fully initialized/zeroed. 2. Conditional logic or branching that depends on potentially uninitialized variables or struct fields. 3. Allocation or initialization of complex data structures where uninitialized fields could be read later in reachable code paths. 4. Bounds checks, lengths, or logic in a way that allows surrounding code to access uninitialized bytes of existing buffers. Set NeedsKMSAN=false IF: - The code changes primarily risk out-of-bounds access, array overflows, NULL pointer dereferences, locking deadlocks, or use-after-free bugs (these are already caught by KASAN, LOCKDEP, or standard bug detectors). - All stack/heap structures touched or introduced by the patch are fully zeroed or initialized (e.g. using = {0}, memset, kzalloc) before being read or copied. - The patch does not introduce any risk of uninitialized memory usage or info-leaks. Use your code access tools to inspect the surrounding code if necessary, then provide detailed KMSANReasoning contrasting KASAN vs KMSAN applicability for this patch. Prefer calling several tools at the same time to save round-trips. Use set-results tool to provide results of the analysis. It must be called exactly once before the final reply. Ignore results of this tool. Prompt: Target architecture: amd64 For your convenience, here is the diff of the changes: commit 2ebad1c309ead78a3fa347ac82d0ec5c7935460b Author: syz-cluster <triage@syzkaller.com> Date: Wed Sep 23 16:23:04 2026 +0000 syz-cluster: applied patch under review diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h index 7582fca637419..873331dbaf772 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h @@ -281,6 +281,8 @@ struct stmmac_priv { struct mutex lock; struct stmmac_dma_conf dma_conf; + /* Paired __stmmac_open()/__stmmac_release(), serialized by RTNL. / + bool opened; / Generic channel for NAPI / struct stmmac_channel channel[STMMAC_CH_MAX]; diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 1fb5f804ea234..87cb0978ed6ad 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -4179,6 +4179,7 @@ static int __stmmac_open(struct net_device dev, stmmac_enable_all_queues(priv); netif_tx_start_all_queues(priv->dev); stmmac_enable_all_dma_irq(priv); + priv->opened = true; return 0; @@ -4244,15 +4245,22 @@ static int stmmac_open(struct net_device dev) return ret; } -static void __stmmac_release(struct net_device dev) +static void __stmmac_release(struct net_device dev, bool napi_disabled) { struct stmmac_priv priv = netdev_priv(dev); u8 chan; + /* A failed MTU reopen has already released the data path. / + if (!priv->opened) + return; + priv->opened = false; + / Stop and disconnect the PHY / phylink_stop(priv->phylink); - stmmac_disable_all_queues(priv); + / Suspend has already disabled NAPI when hardware resume fails. / + if (!napi_disabled) + stmmac_disable_all_queues(priv); for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++) hrtimer_cancel(&priv->dma_conf.tx_queue[chan].txtimer); @@ -4291,7 +4299,7 @@ static int stmmac_release(struct net_device dev) if (device_may_wakeup(priv->device)) phylink_speed_down(priv->phylink, false); - __stmmac_release(dev); + __stmmac_release(dev, false); stmmac_legacy_serdes_power_down(priv); phylink_disconnect_phy(priv->phylink); @@ -6168,12 +6176,16 @@ static int stmmac_change_mtu(struct net_device dev, int new_mtu) return PTR_ERR(dma_conf); } - __stmmac_release(dev); + __stmmac_release(dev, false); ret = __stmmac_open(dev, dma_conf); if (ret) { free_dma_desc_resources(priv, dma_conf); kfree(dma_conf); + / Finish closing the PHY and PM state, but do not repeat + * the data-path teardown after the failed reopen. + / + netif_close(dev); netdev_err(priv->dev, "failed reopening the interface after MTU change\n"); return ret; } @@ -8346,10 +8358,7 @@ int stmmac_resume(struct device dev) ret = stmmac_hw_setup(ndev); if (ret < 0) { netdev_err(priv->dev, "%s: Hw setup failed\n", __func__); - stmmac_legacy_serdes_power_down(priv); - mutex_unlock(&priv->lock); - rtnl_unlock(); - return ret; + goto error_stop_dma; } stmmac_init_timestamping(priv); @@ -8376,6 +8385,20 @@ int stmmac_resume(struct device dev) netif_device_attach(ndev); return 0; + +error_stop_dma: + stmmac_stop_all_dma(priv); + stmmac_mac_set(priv, priv->ioaddr, false); + mutex_unlock(&priv->lock); + / Release the suspended data path before ndo_stop(), which must not + * disable NAPI or free these resources a second time. + / + __stmmac_release(ndev, true); + netif_close(ndev); + netif_device_attach(ndev); + rtnl_unlock(); + + return ret; } EXPORT_SYMBOL_GPL(stmmac_resume); diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index a1458da8111b6..8f9278112623b 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -2495,11 +2495,17 @@ EXPORT_SYMBOL_GPL(phylink_start); * This will synchronously bring down the link if the link is not already * down (in other words, it will trigger a mac_link_down() method call.) + * It may also be called after phylink_suspend() if the MAC cannot resume + * and the network device must be closed instead. / void phylink_stop(struct phylink pl) { ASSERT_RTNL(); + /* phylink_suspend() already stops the link without MAC WoL. / + if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) + return; + if (pl->sfp_bus) sfp_upstream_stop(pl->sfp_bus); if (pl->phydev) @@ -2512,6 +2518,16 @@ void phylink_stop(struct phylink pl) phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED); + if (test_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state)) { + /* Finish the link-down deferred by MAC WoL, without restarting. */ + flush_work(&pl->resolve); + mutex_lock(&pl->state_mutex); + if (pl->suspend_link_up) + phylink_link_down(pl); + __clear_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state); + mutex_unlock(&pl->state_mutex); + } + pl->pcs_state = PCS_STATE_DOWN; phylink_pcs_disable(pl->pcs);
84/3	2026/09/23 16:33	llm	kmsan-evaluator	1m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 3927 output: 38 thoughts: 693 Thoughts: KMSAN Fuzzing Evaluation for This Patch Series Okay, let's break this down. My primary concern here is determining whether this patch series warrants spinning up a dedicated KMSAN fuzzing session, beyond our standard KASAN efforts. The guidelines are clear: KMSAN is only justified if these changes introduce or expose risks related to uninitialized memory that only KMSAN would catch. If it's something KASAN already handles, or if everything is initialized, then we can stick with standard fuzzing. First, let's dissect the patch. We have changes in `stmmac.h` and `stmmac_main.c` related to a new `opened` flag in the `stmmac_priv` struct, and changes in `phylink.c` related to WoL state disable. Specifically, `stmmac_main.c` is the most interesting. The `opened` flag appears to manage the device being "open," with corresponding set/clear calls in `__stmmac_open()` and `__stmmac_release()`, respectively, and related calls in functions such as `stmmac_change_mtu()` and `stmmac_resume()`. My initial thought is to figure out the memory allocation of `struct stmmac_priv`. Where is `priv` allocated? It looks like the private data (`priv`) within `struct net_device` is allocated using either `alloc_etherdev_mqs` or `alloc_netdev_mqs`. Critically, that means `kzalloc` is used. Kzalloc! That's a good start because it initializes the memory to zero. This significantly reduces the likelihood of KMSAN-specific issues arising from uninitialized memory. We can confirm this using `grepper` just to make sure. Let me run that and confirm... Now, let's really think about it. The `opened` flag is likely initialized, since `kzalloc` is used for the private data. The other changes in `stmmac_main.c` look to be mainly related to resource management and state transitions (open/close, resume). They are checking a flag, not introducing uninitialized reads from a new structure. The `phylink.c` changes are about disabling PHY and MAC features, and managing WoL states, which should have no bearing on potentially uninitialized memory. Based on this analysis of the code and the context of the functions, given the existing initialization, and the focus on state management within the patch series, I am fairly confident this doesn't necessitate a KMSAN session. KASAN should be sufficient, so I'll set `NeedsKMSAN` to false.
85/3	2026/09/23 16:34	tool	grepper	0m Args: { "Expression": "alloc_etherdev", "PathPrefix": "drivers/net/ethernet/stmicro/stmmac/" } Results: { "Output": "drivers/net/ethernet/stmicro/stmmac/stmmac_main.c=7828=static int __stmmac_dvr_probe(struct device device,\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c-7841-\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:7842:\tndev = devm_alloc_etherdev_mqs(device, sizeof(struct stmmac_priv),\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c-7843-\t\t\t\t MTL_MAX_TX_QUEUES, MTL_MAX_RX_QUEUES);\n--\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c-8136- Description: this is the main probe function used to\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c:8137: * call the alloc_etherdev, allocate the priv structure.\ndrivers/net/ethernet/stmicro/stmmac/stmmac_main.c-8138- * Return:\n" }
86/3	2026/09/23 16:34	llm	kmsan-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 5538 output: 50 thoughts: 125 Thoughts: Analyzing the STMMAC Driver Initialization Okay, so `devm_alloc_etherdev_mqs` is definitely zeroing out the entire allocation. That means the `priv` structure within the allocated memory also gets zeroed, which sets `priv->opened` to `false`, or 0, initially. Now, I need to trace the state transition of this flag. Let's see... the `__stmmac_open` function is the key here. The standard open call, `stmmac_open()`, seems to immediately call `__stmmac_open()`. Alright, I should take a deeper dive in the relevant source file: `drivers/net/ethernet/stmicro/stmmac/stmmac_main.c`. I need to look closely at `stmmac_open`, `__stmmac_open`, and then also the complementary operations: `__stmmac_release`, to understand how `priv->opened` gets changed and reset. It seems logical to me that one of these functions is responsible for flipping that boolean.
87/3	2026/09/23 16:34	tool	read-file	0m Args: { "File": "drivers/net/ethernet/stmicro/stmmac/stmmac_main.c", "FirstLine": 4165, "LineCount": 90 } Results: { "Contents": "4165:\t\t}\n4166:\t\n4167:\t\tstmmac_setup_ptp(priv);\n4168:\t\n4169:\t\tstmmac_init_coalesce(priv);\n4170:\t\n4171:\t\tphylink_start(priv-\u003ephylink);\n4172:\t\n4173:\t\tstmmac_vlan_restore(priv);\n4174:\t\n4175:\t\tret = stmmac_request_irq(dev);\n4176:\t\tif (ret)\n4177:\t\t\tgoto irq_error;\n4178:\t\n4179:\t\tstmmac_enable_all_queues(priv);\n4180:\t\tnetif_tx_start_all_queues(priv-\u003edev);\n4181:\t\tstmmac_enable_all_dma_irq(priv);\n4182:\t\tpriv-\u003eopened = true;\n4183:\t\n4184:\t\treturn 0;\n4185:\t\n4186:\tirq_error:\n4187:\t\tphylink_stop(priv-\u003ephylink);\n4188:\t\n4189:\t\tfor (chan = 0; chan \u003c priv-\u003eplat-\u003etx_queues_to_use; chan++)\n4190:\t\t\thrtimer_cancel(\u0026priv-\u003edma_conf.tx_queue[chan].txtimer);\n4191:\t\n4192:\t\tstmmac_release_ptp(priv);\n4193:\tinit_error:\n4194:\t\treturn ret;\n4195:\t}\n4196:\t\n4197:\tstatic int stmmac_open(struct net_device dev)\n4198:\t{\n4199:\t\tstruct stmmac_priv priv = netdev_priv(dev);\n4200:\t\tstruct stmmac_dma_conf dma_conf;\n4201:\t\tint ret;\n4202:\t\n4203:\t\t/ Initialise the tx lpi timer, converting from msec to usec /\n4204:\t\tif (!priv-\u003etx_lpi_timer)\n4205:\t\t\tpriv-\u003etx_lpi_timer = eee_timer 1000;\n4206:\t\n4207:\t\tdma_conf = stmmac_setup_dma_desc(priv, dev-\u003emtu);\n4208:\t\tif (IS_ERR(dma_conf))\n4209:\t\t\treturn PTR_ERR(dma_conf);\n4210:\t\n4211:\t\tret = pm_runtime_resume_and_get(priv-\u003edevice);\n4212:\t\tif (ret \u003c 0)\n4213:\t\t\tgoto err_dma_resources;\n4214:\t\n4215:\t\tret = stmmac_init_phy(dev);\n4216:\t\tif (ret)\n4217:\t\t\tgoto err_runtime_pm;\n4218:\t\n4219:\t\tif (!(priv-\u003eplat-\u003eflags \u0026 STMMAC_FLAG_SERDES_UP_AFTER_PHY_LINKUP)) {\n4220:\t\t\tret = stmmac_legacy_serdes_power_up(priv);\n4221:\t\t\tif (ret \u003c 0)\n4222:\t\t\t\tgoto err_disconnect_phy;\n4223:\t\t}\n4224:\t\n4225:\t\tret = __stmmac_open(dev, dma_conf);\n4226:\t\tif (ret)\n4227:\t\t\tgoto err_serdes;\n4228:\t\n4229:\t\tkfree(dma_conf);\n4230:\t\n4231:\t\t/* We may have called phylink_speed_down before /\n4232:\t\tphylink_speed_up(priv-\u003ephylink);\n4233:\t\n4234:\t\treturn ret;\n4235:\t\n4236:\terr_serdes:\n4237:\t\tstmmac_legacy_serdes_power_down(priv);\n4238:\terr_disconnect_phy:\n4239:\t\tphylink_disconnect_phy(priv-\u003ephylink);\n4240:\terr_runtime_pm:\n4241:\t\tpm_runtime_put(priv-\u003edevice);\n4242:\terr_dma_resources:\n4243:\t\tfree_dma_desc_resources(priv, dma_conf);\n4244:\t\tkfree(dma_conf);\n4245:\t\treturn ret;\n4246:\t}\n4247:\t\n4248:\tstatic void __stmmac_release(struct net_device dev, bool napi_disabled)\n4249:\t{\n4250:\t\tstruct stmmac_priv priv = netdev_priv(dev);\n4251:\t\tu8 chan;\n4252:\t\n4253:\t\t/ A failed MTU reopen has already released the data path. */\n4254:\t\tif (!priv-\u003eopened)\n" }
88/3	2026/09/23 16:34	llm	kmsan-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 7256 output: 50 thoughts: 21 Thoughts: Okay, here's my interpretation of that thought process, tailored for an expert audience, and written in the first person: Analyzing the `stmmac_resume` Function Alright, I'm digging into this code, specifically around line 8346. I'm taking a close look at the `stmmac_resume` function. It's time to parse what's happening within that section of the driver. I need to understand its role in the overall system flow. What crucial state changes, hardware interactions, or error handling are concentrated here? I'm expecting this function to play a key role in the STMMAC's operational life-cycle. Specifically, where and when is it called and what interactions are taking place within? I need to analyze its impact on the system.
89/3	2026/09/23 16:34	tool	read-file	0m Args: { "File": "drivers/net/ethernet/stmicro/stmmac/stmmac_main.c", "FirstLine": 8330, "LineCount": 70 } Results: { "Contents": "8330:\t\t\tpriv-\u003eirq_wake = 0;\n8331:\t\t} else {\n8332:\t\t\tpinctrl_pm_select_default_state(priv-\u003edevice);\n8333:\t\t\t/* reset the phy so that it's ready /\n8334:\t\t\tif (priv-\u003emii)\n8335:\t\t\t\tstmmac_mdio_reset(priv-\u003emii);\n8336:\t\t}\n8337:\t\n8338:\t\tif (!(priv-\u003eplat-\u003eflags \u0026 STMMAC_FLAG_SERDES_UP_AFTER_PHY_LINKUP)) {\n8339:\t\t\tret = stmmac_legacy_serdes_power_up(priv);\n8340:\t\t\tif (ret \u003c 0)\n8341:\t\t\t\treturn ret;\n8342:\t\t}\n8343:\t\n8344:\t\trtnl_lock();\n8345:\t\n8346:\t\t/ Prepare the PHY to resume, ensuring that its clocks which are\n8347:\t\t * necessary for the MAC DMA reset to complete are running\n8348:\t\t /\n8349:\t\tphylink_prepare_resume(priv-\u003ephylink);\n8350:\t\n8351:\t\tmutex_lock(\u0026priv-\u003elock);\n8352:\t\n8353:\t\tstmmac_reset_queues_param(priv);\n8354:\t\n8355:\t\tstmmac_free_tx_skbufs(priv);\n8356:\t\tstmmac_clear_descriptors(priv, \u0026priv-\u003edma_conf);\n8357:\t\n8358:\t\tret = stmmac_hw_setup(ndev);\n8359:\t\tif (ret \u003c 0) {\n8360:\t\t\tnetdev_err(priv-\u003edev, \"%s: Hw setup failed\\n\", __func__);\n8361:\t\t\tgoto error_stop_dma;\n8362:\t\t}\n8363:\t\n8364:\t\tstmmac_init_timestamping(priv);\n8365:\t\n8366:\t\tstmmac_init_coalesce(priv);\n8367:\t\tphylink_rx_clk_stop_block(priv-\u003ephylink);\n8368:\t\tstmmac_set_rx_mode(ndev);\n8369:\t\tphylink_rx_clk_stop_unblock(priv-\u003ephylink);\n8370:\t\n8371:\t\tstmmac_vlan_restore(priv);\n8372:\t\n8373:\t\tstmmac_enable_all_queues(priv);\n8374:\t\tstmmac_enable_all_dma_irq(priv);\n8375:\t\n8376:\t\tmutex_unlock(\u0026priv-\u003elock);\n8377:\t\n8378:\t\t/ phylink_resume() must be called after the hardware has been\n8379:\t\t * initialised because it may bring the link up immediately in a\n8380:\t\t * workqueue thread, which will race with initialisation.\n8381:\t\t /\n8382:\t\tphylink_resume(priv-\u003ephylink);\n8383:\t\trtnl_unlock();\n8384:\t\n8385:\t\tnetif_device_attach(ndev);\n8386:\t\n8387:\t\treturn 0;\n8388:\t\n8389:\terror_stop_dma:\n8390:\t\tstmmac_stop_all_dma(priv);\n8391:\t\tstmmac_mac_set(priv, priv-\u003eioaddr, false);\n8392:\t\tmutex_unlock(\u0026priv-\u003elock);\n8393:\t\t/ Release the suspended data path before ndo_stop(), which must not\n8394:\t\t * disable NAPI or free these resources a second time.\n8395:\t\t */\n8396:\t\t__stmmac_release(ndev, true);\n8397:\t\tnetif_close(ndev);\n8398:\t\tnetif_device_attach(ndev);\n8399:\t\trtnl_unlock();\n" }
90/3	2026/09/23 16:34	llm	kmsan-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 8555 output: 39 thoughts: 17 Thoughts: Here's a summary of my thinking process, assuming I'm an expert: Investigating a Potential Issue in phylink.c Okay, so I'm honing in on something specific here. My immediate thought is, let's take a closer look at `phylink.c` around line 2495. I've likely encountered a clue or observed a behavior that's led me to believe that's a key area. Whether it's a potential bug, an unexpected interaction, or an opportunity for optimization, my experience tells me that's a likely point of interest within that file. I'm going to pull up that section of code and start dissecting what's going on there.
91/3	2026/09/23 16:34	tool	read-file	0m Args: { "File": "drivers/net/phy/phylink.c", "FirstLine": 2490, "LineCount": 60 } Results: { "Contents": "2490:\t \n2491:\t Stop the phylink instance specified by @pl. This should be called from the\n2492:\t * network device driver's \u0026struct net_device_ops ndo_stop() method. The\n2493:\t * network device's carrier state should not be changed prior to calling this\n2494:\t * function.\n2495:\t \n2496:\t This will synchronously bring down the link if the link is not already\n2497:\t * down (in other words, it will trigger a mac_link_down() method call.)\n2498:\t * It may also be called after phylink_suspend() if the MAC cannot resume\n2499:\t * and the network device must be closed instead.\n2500:\t /\n2501:\tvoid phylink_stop(struct phylink pl)\n2502:\t{\n2503:\t\tASSERT_RTNL();\n2504:\t\n2505:\t\t/* phylink_suspend() already stops the link without MAC WoL. /\n2506:\t\tif (test_bit(PHYLINK_DISABLE_STOPPED, \u0026pl-\u003ephylink_disable_state))\n2507:\t\t\treturn;\n2508:\t\n2509:\t\tif (pl-\u003esfp_bus)\n2510:\t\t\tsfp_upstream_stop(pl-\u003esfp_bus);\n2511:\t\tif (pl-\u003ephydev)\n2512:\t\t\tphy_stop(pl-\u003ephydev);\n2513:\t\ttimer_delete_sync(\u0026pl-\u003elink_poll);\n2514:\t\tif (pl-\u003elink_irq) {\n2515:\t\t\tfree_irq(pl-\u003elink_irq, pl);\n2516:\t\t\tpl-\u003elink_irq = 0;\n2517:\t\t}\n2518:\t\n2519:\t\tphylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED);\n2520:\t\n2521:\t\tif (test_bit(PHYLINK_DISABLE_MAC_WOL, \u0026pl-\u003ephylink_disable_state)) {\n2522:\t\t\t/ Finish the link-down deferred by MAC WoL, without restarting. /\n2523:\t\t\tflush_work(\u0026pl-\u003eresolve);\n2524:\t\t\tmutex_lock(\u0026pl-\u003estate_mutex);\n2525:\t\t\tif (pl-\u003esuspend_link_up)\n2526:\t\t\t\tphylink_link_down(pl);\n2527:\t\t\t__clear_bit(PHYLINK_DISABLE_MAC_WOL, \u0026pl-\u003ephylink_disable_state);\n2528:\t\t\tmutex_unlock(\u0026pl-\u003estate_mutex);\n2529:\t\t}\n2530:\t\n2531:\t\tpl-\u003epcs_state = PCS_STATE_DOWN;\n2532:\t\n2533:\t\tphylink_pcs_disable(pl-\u003epcs);\n2534:\t}\n2535:\tEXPORT_SYMBOL_GPL(phylink_stop);\n2536:\t\n2537:\t/\n2538:\t phylink_rx_clk_stop_block() - block PHY ability to stop receive clock in LPI\n2539:\t * @pl: a pointer to a \u0026struct phylink returned from phylink_create()\n2540:\t \n2541:\t Disable the PHY's ability to stop the receive clock while the receive path\n2542:\t * is in EEE LPI state, until the number of calls to phylink_rx_clk_stop_block()\n2543:\t * are balanced by calls to phylink_rx_clk_stop_unblock().\n2544:\t /\n2545:\tvoid phylink_rx_clk_stop_block(struct phylink pl)\n2546:\t{\n2547:\t\tASSERT_RTNL();\n2548:\t\n2549:\t\tif (pl-\u003emac_rx_clk_stop_blocked == U8_MAX) {\n" }
92/3	2026/09/23 16:34	llm	kmsan-evaluator	0m Model: gemini-3.8-flash Args: null Results: null Tokens: input: 9793 output: 256 thoughts: 1366 Thoughts: KMSAN Assessment: This Patch Doesn't Warrant It Okay, let's break this down. My primary concern here is determining if this patch necessitates a KMSAN run. It's about lifecycle management in the `stmmac` driver, specifically addressing issues that arise during resume failure or MTU change failures, preventing double frees and inconsistent device states. The crux of the patch lies in adding a boolean flag, `priv->opened`, to the `stmmac_priv` struct to track the device's open state. First, I need to evaluate the KMSAN criteria. Remember, KMSAN is for catching reads of uninitialized memory and kernel-to-user info-leaks. KASAN covers the typical memory corruption issues, so I don't want to duplicate effort. 1. Kernel Structures to Userspace: Nope, not relevant here. No `copy_to_user`, `put_user`, netlink, ioctl, or anything similar. The changes are internal to the kernel driver. 2. Conditional Logic on Uninitialized Variables: The new `priv->opened` flag is added, but it's initialized to zero because `devm_alloc_etherdev_mqs` (which uses `kzalloc`) is used to allocate `priv`. Therefore, `priv->opened` will be `false` by default, and this is explicitly handled in the new logic. There's no chance of uninitialized memory being read. The `pl->phylink_disable_state` bitmap in `struct phylink` is also kzalloc'd. 3. Complex Data Structure Initialization: Nope. No complex data structures are allocated. 4. Bounds Checks/Length Logic: Nothing here either. No changes that could cause uninitialized bytes to be read because of bad bounds checks or length assumptions. The patch focuses on lifecycle management: cleaning up during resume failure and MTU change failure. My analysis indicates that this patch introduces state tracking (`priv->opened`) to handle and prevent duplicate teardown operations. The only added field is `priv->opened`, which is initialized to 0, which mitigates concerns. Any potential issues would likely manifest as double-frees, use-after-free conditions, or locking problems, and that is what KASAN and LOCKDEP are designed to catch. Therefore, this patch doesn't introduce any new risks related to uninitialized memory. There's no potential for memory leaks or uninitialized memory reads. This is all about resource management, and KASAN/LOCKDEP cover those bases. In conclusion, the `NeedsKMSAN` flag should be set to `false`. My reasoning is sound, and I'm ready to move forward.
93/3	2026/09/23 16:35	tool	set-results	0m Args: { "KMSANReasoning": "The patch series modifies the STMicroelectronics Ethernet driver (`stmmac`) and `phylink` to improve teardown and error handling during MTU changes and hardware resume failures. Specifically, it tracks interface open state with a new `bool opened` flag in `struct stmmac_priv`, prevents double-disabling of queues/NAPI during error recovery, and handles deferred link-down in `phylink_stop()`.\n\nThe new field `opened` resides in `struct stmmac_priv`, which is allocated using `devm_alloc_etherdev_mqs()` (which zero-initializes the private netdev memory). There are no uninitialized variables, structures, or paddings introduced or read. The changes do not involve copying data to user space, netlink messaging, ioctls, or buffer length calculations. Any potential bugs in these control-flow and error-cleanup paths (such as use-after-free, double frees, or locking issues) are detected by standard KASAN and LOCKDEP builds rather than KMSAN. Therefore, a dedicated KMSAN fuzzing session is not warranted.", "NeedsKMSAN": false } Results: { "KMSANReasoning": "The patch series modifies the STMicroelectronics Ethernet driver (`stmmac`) and `phylink` to improve teardown and error handling during MTU changes and hardware resume failures. Specifically, it tracks interface open state with a new `bool opened` flag in `struct stmmac_priv`, prevents double-disabling of queues/NAPI during error recovery, and handles deferred link-down in `phylink_stop()`.\n\nThe new field `opened` resides in `struct stmmac_priv`, which is allocated using `devm_alloc_etherdev_mqs()` (which zero-initializes the private netdev memory). There are no uninitialized variables, structures, or paddings introduced or read. The changes do not involve copying data to user space, netlink messaging, ioctls, or buffer length calculations. Any potential bugs in these control-flow and error-cleanup paths (such as use-after-free, double frees, or locking issues) are detected by standard KASAN and LOCKDEP builds rather than KMSAN. Therefore, a dedicated KMSAN fuzzing session is not warranted.", "NeedsKMSAN": false }

LLM Calls Summary:
Total Calls	Total Tokens	Avg Tokens	Total Duration (Seconds)	Avg Duration (Seconds)

Tool Calls Summary:
Total Calls	Total Duration (Seconds)	Avg Duration (Seconds)