| Seq | Timestamp | Type | Name | Duration |
|---|---|---|---|---|
| 0/0 | 2026/10/11 07:56 | flow | patch-triage |
3mArgs:null Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"KMSANReasoning": "",
"NeedsKMSAN": false,
"Reasoning": "The patch modifies `mt76x02_key_sync()` in `drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c`. This static function is exclusively invoked by `mt76x02_reset_state()` during the watchdog reset path (`mt76x02_wdt_work()`) of MediaTek MT76x0/MT76x2 PCIe devices (mt76x0e, mt76x2e). It is not utilized by USB variants (which do not register `mt76x02_wdt_work`). Because these PCIe wireless devices require physical vendor hardware that is not emulated in standard virtualized fuzzing environments (QEMU/GCE), the modified code is structurally unreachable.",
"WorthFuzzing": false
} |
| 1/1 | 2026/10/11 07:56 | action | read-patch-diff |
0mArgs:null Results: {
"PatchDiff": "commit 0e03b3d71b1475862e3fabeac6772b092aeecddd\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Sun Oct 11 07:56:58 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c b/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c\nindex dc7c03d231238..ce4e0086e0e1d 100644\n--- a/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c\n+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c\n@@ -377,12 +377,13 @@ static void mt76x02_key_sync(struct ieee80211_hw *hw, struct ieee80211_vif *vif,\n \t\t\t struct ieee80211_key_conf *key, void *data)\n {\n \tstruct mt76x02_dev *dev = hw-\u003epriv;\n+\tstruct mt76x02_vif *mvif = (struct mt76x02_vif *)vif-\u003edrv_priv;\n \tstruct mt76_wcid *wcid;\n \n-\tif (!sta)\n-\t\treturn;\n-\n-\twcid = (struct mt76_wcid *)sta-\u003edrv_priv;\n+\tif (sta)\n+\t\twcid = (struct mt76_wcid *)sta-\u003edrv_priv;\n+\telse\n+\t\twcid = \u0026mvif-\u003egroup_wcid;\n \n \tif (wcid-\u003ehw_key_idx != key-\u003ekeyidx || wcid-\u003esw_iv)\n \t\treturn;\n"
} |
| 2/1 | 2026/10/11 07:57 | agent | patch-evaluator |
3mModel:core Args: null Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"Reasoning": "The patch modifies `mt76x02_key_sync()` in `drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c`. This static function is exclusively invoked by `mt76x02_reset_state()` during the watchdog reset path (`mt76x02_wdt_work()`) of MediaTek MT76x0/MT76x2 PCIe devices (mt76x0e, mt76x2e). It is not utilized by USB variants (which do not register `mt76x02_wdt_work`). Because these PCIe wireless devices require physical vendor hardware that is not emulated in standard virtualized fuzzing environments (QEMU/GCE), the modified code is structurally unreachable.",
"WorthFuzzing": false
}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 0e03b3d71b1475862e3fabeac6772b092aeecddd
Author: syz-cluster <triage@syzkaller.com>
Date: Sun Oct 11 07:56:58 2026 +0000
syz-cluster: applied patch under review
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c b/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c
index dc7c03d231238..ce4e0086e0e1d 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c
@@ -377,12 +377,13 @@ static void mt76x02_key_sync(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_key_conf *key, void *data)
{
struct mt76x02_dev *dev = hw->priv;
+ struct mt76x02_vif *mvif = (struct mt76x02_vif *)vif->drv_priv;
struct mt76_wcid *wcid;
- if (!sta)
- return;
-
- wcid = (struct mt76_wcid *)sta->drv_priv;
+ if (sta)
+ wcid = (struct mt76_wcid *)sta->drv_priv;
+ else
+ wcid = &mvif->group_wcid;
if (wcid->hw_key_idx != key->keyidx || wcid->sw_iv)
return;
|
| 3/2 | 2026/10/11 07:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 3213 output: 42 thoughts: 548 Thoughts: **Analyzing a Patch: `mt76x02_mmio.c`** Okay, I need to evaluate this patch. First, let me take a look at the diff. It seems to be modifying the `mt76x02_key_sync` function within `drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c`. This function likely handles key synchronization for the Mediatek mt76x02 wireless driver. The change appears to be in how the `wcid` (wireless context ID) is handled when `sta` (station) is NULL. It looks like it's now using `mvif->group_wcid` in that case. Alright, let's zoom out a bit. I need to understand the implications of this change within the broader context of the driver and its interactions. Let me see... `drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c`. This is the file I'm looking at. Now, how does this driver behave? Is this particular Mediatek driver commonly used in standard virtualized environments like QEMU or GCE? Or is this driver more specific to particular hardware? Knowing this is important for replicating and testing the change. To get a clearer picture, I need to know the hardware that `mt76x02_mmio` is designed for. I need to understand what devices this code controls. I'll need to figure out where it's compiled and what configuration options drive its inclusion. Time to break out `grepper` or maybe just read the relevant `Makefile` or Kconfig files. That should give me the information I need to assess the patch's impact thoroughly. |
| 4/2 | 2026/10/11 07:57 | tool | grepper |
0mArgs:{
"Expression": "mt76x02_mmio",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/Makefile=31=mt76x02-lib-y := mt76x02_util.o mt76x02_mac.o mt76x02_mcu.o \\\ndrivers/net/wireless/mediatek/mt76/Makefile:32:\t\t mt76x02_eeprom.o mt76x02_phy.o mt76x02_mmio.o \\\ndrivers/net/wireless/mediatek/mt76/Makefile-33-\t\t mt76x02_txrx.o mt76x02_trace.o mt76x02_debugfs.o \\\n"
} |
| 5/2 | 2026/10/11 07:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 4361 output: 41 thoughts: 16 Thoughts: Okay, let's dive into this. Here's my take on understanding this situation: **Investigating the Uses of `mt76x02-lib`** Alright, so the task at hand is to understand how this `mt76x02-lib` library is utilized. My immediate thought is to start dissecting its applications. Given that it's a library, I'm already anticipating that it provides some underlying functionalities, perhaps related to WiFi or other communication protocols, likely specific to a Mediatek chipset, given the naming convention. I'll need to figure out: * **Its purpose:** What tasks does it abstract or facilitate? Is it a driver, a utility library, or something else entirely? * **Dependencies:** What other components or libraries does it rely on? Understanding its dependencies will provide insight into its architecture and integration points. * **Interfaces:** What API functions or methods are exposed? Understanding the API will let me determine how other programs use it. * **Use Cases:** How and where is this library being integrated into larger projects? Searching for examples, documentation, or code snippets will give me the best insight into its practical application. * **Target hardware:** What kind of hardware does this library support? I'm expecting to find insights into its role in handling specific hardware interaction, possibly through reverse engineering, studying documentation, or examining related projects. I will likely look for a source code repository, documentation, or examples on the internet, probably through a search engine. I'll need to use my established methods of code analysis and project understanding to fully grasp its functionality and applicability. |
| 6/2 | 2026/10/11 07:57 | tool | grepper |
0mArgs:{
"Expression": "mt76x02-lib",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/Makefile=4=obj-$(CONFIG_MT76_SDIO) += mt76-sdio.o\ndrivers/net/wireless/mediatek/mt76/Makefile:5:obj-$(CONFIG_MT76x02_LIB) += mt76x02-lib.o\ndrivers/net/wireless/mediatek/mt76/Makefile-6-obj-$(CONFIG_MT76x02_USB) += mt76x02-usb.o\n--\ndrivers/net/wireless/mediatek/mt76/Makefile=29=CFLAGS_mt792x_trace.o := -I$(src)\ndrivers/net/wireless/mediatek/mt76/Makefile-30-\ndrivers/net/wireless/mediatek/mt76/Makefile:31:mt76x02-lib-y := mt76x02_util.o mt76x02_mac.o mt76x02_mcu.o \\\ndrivers/net/wireless/mediatek/mt76/Makefile-32-\t\t mt76x02_eeprom.o mt76x02_phy.o mt76x02_mmio.o \\\n"
} |
| 7/2 | 2026/10/11 07:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 5072 output: 41 thoughts: 21 Thoughts: Okay, here's my interpretation of that thought process, tailored for an expert audience, and rendered in the first person: **Investigating Dependencies on CONFIG_MT76x02_LIB** Alright, let's dive in. My immediate thought is, "Okay, `CONFIG_MT76x02_LIB`. What exactly is *using* this? What are the implications of enabling or disabling it?" I'm mentally parsing the build configuration system – I need to quickly identify the modules, drivers, or higher-level features that either directly *select* `CONFIG_MT76x02_LIB`, or, more subtly, *depend* on its presence. I'm thinking I'll need to use some `Kconfig` searching techniques. Is there a `select` statement involved? Are there any indirect dependencies? Maybe there's a more complex dependency tree, with conditionals and tristate options layered in there. I'll need to trace things back and forth. I'm imagining using tools like `grep` or `find` within the kernel source tree, looking for all instances where `CONFIG_MT76x02_LIB` is mentioned, and then carefully examining the surrounding context. My initial hypothesis is that this is likely a library for specific hardware, such as WiFi hardware. My expectation is that the configuration option will likely be connected to a family of drivers. I am keen to understand, at a granular level, exactly how this library integrates with, say, the main network stack or other subsystems. What are the build-time implications? Is this a hard dependency, or can certain functionality be decoupled? I'm already anticipating potential issues with symbol collisions, linker errors, and version compatibility if this library interacts with other potentially overlapping components. So, time to start digging! |
| 8/2 | 2026/10/11 07:57 | tool | grepper |
0mArgs:{
"Expression": "MT76x02_LIB",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/Kconfig=16=config MT76_SDIO\n--\ndrivers/net/wireless/mediatek/mt76/Kconfig-19-\ndrivers/net/wireless/mediatek/mt76/Kconfig:20:config MT76x02_LIB\ndrivers/net/wireless/mediatek/mt76/Kconfig-21-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/Makefile=4=obj-$(CONFIG_MT76_SDIO) += mt76-sdio.o\ndrivers/net/wireless/mediatek/mt76/Makefile:5:obj-$(CONFIG_MT76x02_LIB) += mt76x02-lib.o\ndrivers/net/wireless/mediatek/mt76/Makefile-6-obj-$(CONFIG_MT76x02_USB) += mt76x02-usb.o\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig=2=config MT76x0_COMMON\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig-3-\ttristate\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig:4:\tselect MT76x02_LIB\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig-5-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig=2=config MT76x2_COMMON\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig-3-\ttristate\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig:4:\tselect MT76x02_LIB\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig-5-\n"
} |
| 9/2 | 2026/10/11 07:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 6001 output: 43 thoughts: 128 Thoughts: **Investigating the MT76x0/MT76x2 Driver Configuration** Okay, hold on a second. I need to understand the dependency logic here. Specifically, what's triggering the selection of `MT76x0_COMMON` and `MT76x2_COMMON`? Let's trace it back. The logical first step is to dig into the `Kconfig` files within the `mt76x0` and `mt76x2` directories. That should reveal the configuration options and dependencies governing those common components. And then, since I have `mt76x02_mmio.c` in mind for some reason, let's also have a peek at that, to give us some perspective. Aha! Now a critical question surfaces: How is `mt76x02_mmio.c` actually *used*? Is it specific to USB implementations, or is it also relevant to PCIe, or maybe even those MMIO/SoC configurations? Time to broaden the scope a bit. To get a true picture, I need to see the calling context. I need to identify where those functions, like `mt76x02_key_sync` and other functions in `mt76x02_mmio.c`, are being invoked. That will give me the clearest indication of its role and how it interacts with the rest of the driver. Let's start with a thorough cross-reference. |
| 10/2 | 2026/10/11 07:57 | tool | grepper |
0mArgs:{
"Expression": "mt76x02_key_sync",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=350=static bool mt76x02_tx_hang(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-374-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:375:static void mt76x02_key_sync(struct ieee80211_hw *hw, struct ieee80211_vif *vif,\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-376-\t\t\t struct ieee80211_sta *sta,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=394=static void mt76x02_reset_state(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-402-\trcu_read_lock();\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:403:\tieee80211_iter_keys_rcu(dev-\u003emt76.hw, NULL, mt76x02_key_sync, NULL);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-404-\trcu_read_unlock();\n"
} |
| 11/2 | 2026/10/11 07:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 6903 output: 52 thoughts: 49 Thoughts: Here's my analysis of the provided text, rendered as a first-person expert summary: **Analyzing `mt76x02_mmio.c` Function Exports and Usage** Okay, so I need to get a handle on the function landscape within `mt76x02_mmio.c`. My immediate goal is to understand which functions are externally accessible or, crucially, being used by other parts of the driver. A quick scan of the symbol export table would be helpful, but let's dive in more systematically. I'll focus my attention on the vicinity of line 400. That's usually a good indicator of where some critical initialization or control logic might reside in this kind of driver code. Knowing the local code context around line 400 can give me a decent jumping-off point for further investigation. It'll give me a feel for how this module is interacting with the hardware and other software components. |
| 12/2 | 2026/10/11 07:57 | tool | read-file |
0mArgs:{
"File": "drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c",
"FirstLine": 370,
"LineCount": 80
}Results: {
"Contents": " 370:\t\t}\n 371:\t\n 372:\t\treturn false;\n 373:\t}\n 374:\t\n 375:\tstatic void mt76x02_key_sync(struct ieee80211_hw *hw, struct ieee80211_vif *vif,\n 376:\t\t\t\t struct ieee80211_sta *sta,\n 377:\t\t\t\t struct ieee80211_key_conf *key, void *data)\n 378:\t{\n 379:\t\tstruct mt76x02_dev *dev = hw-\u003epriv;\n 380:\t\tstruct mt76x02_vif *mvif = (struct mt76x02_vif *)vif-\u003edrv_priv;\n 381:\t\tstruct mt76_wcid *wcid;\n 382:\t\n 383:\t\tif (sta)\n 384:\t\t\twcid = (struct mt76_wcid *)sta-\u003edrv_priv;\n 385:\t\telse\n 386:\t\t\twcid = \u0026mvif-\u003egroup_wcid;\n 387:\t\n 388:\t\tif (wcid-\u003ehw_key_idx != key-\u003ekeyidx || wcid-\u003esw_iv)\n 389:\t\t\treturn;\n 390:\t\n 391:\t\tmt76x02_mac_wcid_sync_pn(dev, wcid-\u003eidx, key);\n 392:\t}\n 393:\t\n 394:\tstatic void mt76x02_reset_state(struct mt76x02_dev *dev)\n 395:\t{\n 396:\t\tint i;\n 397:\t\n 398:\t\tlockdep_assert_held(\u0026dev-\u003emt76.mutex);\n 399:\t\n 400:\t\tclear_bit(MT76_STATE_RUNNING, \u0026dev-\u003emphy.state);\n 401:\t\n 402:\t\trcu_read_lock();\n 403:\t\tieee80211_iter_keys_rcu(dev-\u003emt76.hw, NULL, mt76x02_key_sync, NULL);\n 404:\t\trcu_read_unlock();\n 405:\t\n 406:\t\tfor (i = 0; i \u003c MT76x02_N_WCIDS; i++) {\n 407:\t\t\tstruct ieee80211_sta *sta;\n 408:\t\t\tstruct ieee80211_vif *vif;\n 409:\t\t\tstruct mt76x02_sta *msta;\n 410:\t\t\tstruct mt76_wcid *wcid;\n 411:\t\t\tvoid *priv;\n 412:\t\n 413:\t\t\twcid = rcu_dereference_protected(dev-\u003emt76.wcid[i],\n 414:\t\t\t\t\t\tlockdep_is_held(\u0026dev-\u003emt76.mutex));\n 415:\t\t\tif (!wcid)\n 416:\t\t\t\tcontinue;\n 417:\t\n 418:\t\t\trcu_assign_pointer(dev-\u003emt76.wcid[i], NULL);\n 419:\t\n 420:\t\t\tpriv = msta = container_of(wcid, struct mt76x02_sta, wcid);\n 421:\t\t\tsta = container_of(priv, struct ieee80211_sta, drv_priv);\n 422:\t\n 423:\t\t\tpriv = msta-\u003evif;\n 424:\t\t\tvif = container_of(priv, struct ieee80211_vif, drv_priv);\n 425:\t\n 426:\t\t\t__mt76_sta_remove(\u0026dev-\u003emphy, vif, sta);\n 427:\t\t\tmemset(msta, 0, sizeof(*msta));\n 428:\t\t}\n 429:\t\n 430:\t\tdev-\u003emt76.vif_mask = 0;\n 431:\t\tdev-\u003emt76.beacon_mask = 0;\n 432:\t}\n 433:\t\n 434:\tstatic void mt76x02_watchdog_reset(struct mt76x02_dev *dev)\n 435:\t{\n 436:\t\tu32 mask = dev-\u003emt76.mmio.irqmask;\n 437:\t\tbool restart = dev-\u003emt76.mcu_ops-\u003emcu_restart;\n 438:\t\tint i;\n 439:\t\n 440:\t\tieee80211_stop_queues(dev-\u003emt76.hw);\n 441:\t\tset_bit(MT76_RESET, \u0026dev-\u003emphy.state);\n 442:\t\n 443:\t\ttasklet_disable(\u0026dev-\u003emt76.pre_tbtt_tasklet);\n 444:\t\tmt76_worker_disable(\u0026dev-\u003emt76.tx_worker);\n 445:\t\tnapi_disable(\u0026dev-\u003emt76.tx_napi);\n 446:\t\n 447:\t\tmt76_for_each_q_rx(\u0026dev-\u003emt76, i) {\n 448:\t\t\tnapi_disable(\u0026dev-\u003emt76.napi[i]);\n 449:\t\t}\n"
} |
| 13/2 | 2026/10/11 07:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 8604 output: 49 thoughts: 75 Thoughts: Okay, let's dive into this. Here's how I'm thinking about it, focusing on the `mt76x02` driver specifically, given what I know about the platform's architecture. **Investigating the Reset & Watchdog Mechanisms in mt76x02** Alright, I'm going to start by understanding the reset and watchdog routines within the `mt76x02` driver. My initial instinct is to pinpoint how the device is brought back to a known state after an error, and how the watchdog timer fits into that overall scheme. Therefore, I want to trace the execution path that involves the functions `mt76x02_reset_state` and `mt76x02_watchdog_reset`. Specifically, I need to see what's *calling* them, and understand the circumstances under which they're triggered. Understanding how reset states and watchdogs interoperate gives me a good start. Next, I need a good understanding of what the memory mapped I/O code actually *does*. I'll check `mt76x02_mmio.c` to see how it's interacting with the hardware. I want a general overview of the MMIO interface to understand how the driver communicates with the physical hardware. Finally, I'll leverage `grep` to quickly identify any exported functions or other references, both within and *outside* `mt76x02_mmio.c`, that are relevant. This should highlight the critical parts of the driver and quickly identify points of interaction with other parts of the codebase. This should give me a good handle on its role, function calls and any dependencies. |
| 14/2 | 2026/10/11 07:57 | tool | grepper |
0mArgs:{
"Expression": "EXPORT_SYMBOL.*",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=92=void mt76x02e_init_beacon_config(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-111-}\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:112:EXPORT_SYMBOL_GPL(mt76x02e_init_beacon_config);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-113-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=175=int mt76x02_dma_init(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-246-}\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:247:EXPORT_SYMBOL_GPL(mt76x02_dma_init);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-248-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=249=void mt76x02_rx_poll_complete(struct mt76_dev *mdev, enum mt76_rxq_id q)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-255-}\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:256:EXPORT_SYMBOL_GPL(mt76x02_rx_poll_complete);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-257-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=258=irqreturn_t mt76x02_irq_handler(int irq, void *dev_instance)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-305-}\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:306:EXPORT_SYMBOL_GPL(mt76x02_irq_handler);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-307-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=324=void mt76x02_dma_disable(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-333-}\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:334:EXPORT_SYMBOL_GPL(mt76x02_dma_disable);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-335-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=336=void mt76x02_mac_start(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-347-}\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:348:EXPORT_SYMBOL_GPL(mt76x02_mac_start);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-349-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=529=void mt76x02_reconfig_complete(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-539-}\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:540:EXPORT_SYMBOL_GPL(mt76x02_reconfig_complete);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-541-\n"
} |
| 15/2 | 2026/10/11 07:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 10277 output: 52 thoughts: 151 Thoughts: Okay, here's my take on those functions. **Initial Assessment of Driver Functions** Alright, let's see what we're working with. Immediately, I see a familiar set of functions: `mt76x02e_init_beacon_config`, `mt76x02_dma_init`, `mt76x02_rx_poll_complete`, `mt76x02_irq_handler`, `mt76x02_dma_disable`, `mt76x02_mac_start`, and `mt76x02_reconfig_complete`. These names strongly suggest a typical Wi-Fi driver architecture, focusing on beacon configuration, DMA initialization and handling, receive polling, interrupt handling, DMA disable, MAC start-up and configuration, and re-configuration completion. I'm especially interested in how they're orchestrated, and how the driver manages different states. Now, I want to trace the execution path. My focus is on understanding the reset sequence and state management, so I want to find where `mt76x02_watchdog_reset` and `mt76x02_reset_state` are called. Given the potential for watchdog timer usage and state transitions, I think the area around lines 434-539 is a good place to start digging. This should give me some context on how the driver handles potential hardware lock-ups or error conditions. Time to get my hands dirty and investigate. |
| 16/2 | 2026/10/11 07:57 | tool | read-file |
0mArgs:{
"File": "drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c",
"FirstLine": 450,
"LineCount": 90
}Results: {
"Contents": " 450:\t\n 451:\t\tmutex_lock(\u0026dev-\u003emt76.mutex);\n 452:\t\n 453:\t\tdev-\u003emcu_timeout = 0;\n 454:\t\tif (restart)\n 455:\t\t\tmt76x02_reset_state(dev);\n 456:\t\n 457:\t\tif (dev-\u003emt76.beacon_mask)\n 458:\t\t\tmt76_clear(dev, MT_BEACON_TIME_CFG,\n 459:\t\t\t\t MT_BEACON_TIME_CFG_BEACON_TX |\n 460:\t\t\t\t MT_BEACON_TIME_CFG_TBTT_EN);\n 461:\t\n 462:\t\tmt76x02_irq_disable(dev, mask);\n 463:\t\n 464:\t\t/* perform device reset */\n 465:\t\tmt76_clear(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN);\n 466:\t\tmt76_wr(dev, MT_MAC_SYS_CTRL, 0);\n 467:\t\tmt76_clear(dev, MT_WPDMA_GLO_CFG,\n 468:\t\t\t MT_WPDMA_GLO_CFG_TX_DMA_EN | MT_WPDMA_GLO_CFG_RX_DMA_EN);\n 469:\t\tusleep_range(5000, 10000);\n 470:\t\tmt76_wr(dev, MT_INT_SOURCE_CSR, 0xffffffff);\n 471:\t\n 472:\t\t/* let fw reset DMA */\n 473:\t\tmt76_set(dev, 0x734, 0x3);\n 474:\t\n 475:\t\tif (restart)\n 476:\t\t\tmt76_mcu_restart(dev);\n 477:\t\n 478:\t\tmt76_queue_tx_cleanup(dev, dev-\u003emt76.q_mcu[MT_MCUQ_WM], true);\n 479:\t\tfor (i = 0; i \u003c __MT_TXQ_MAX; i++)\n 480:\t\t\tmt76_queue_tx_cleanup(dev, dev-\u003emphy.q_tx[i], true);\n 481:\t\n 482:\t\tmt76_for_each_q_rx(\u0026dev-\u003emt76, i) {\n 483:\t\t\tmt76_queue_rx_reset(dev, i);\n 484:\t\t}\n 485:\t\n 486:\t\tmt76_tx_status_check(\u0026dev-\u003emt76, true);\n 487:\t\n 488:\t\tmt76x02_mac_start(dev);\n 489:\t\n 490:\t\tif (dev-\u003eed_monitor)\n 491:\t\t\tmt76_set(dev, MT_TXOP_CTRL_CFG, MT_TXOP_ED_CCA_EN);\n 492:\t\n 493:\t\tif (dev-\u003emt76.beacon_mask \u0026\u0026 !restart)\n 494:\t\t\tmt76_set(dev, MT_BEACON_TIME_CFG,\n 495:\t\t\t\t MT_BEACON_TIME_CFG_BEACON_TX |\n 496:\t\t\t\t MT_BEACON_TIME_CFG_TBTT_EN);\n 497:\t\n 498:\t\tmt76x02_irq_enable(dev, mask);\n 499:\t\n 500:\t\tmutex_unlock(\u0026dev-\u003emt76.mutex);\n 501:\t\n 502:\t\tclear_bit(MT76_RESET, \u0026dev-\u003emphy.state);\n 503:\t\n 504:\t\tmt76_worker_enable(\u0026dev-\u003emt76.tx_worker);\n 505:\t\ttasklet_enable(\u0026dev-\u003emt76.pre_tbtt_tasklet);\n 506:\t\n 507:\t\tnapi_enable(\u0026dev-\u003emt76.tx_napi);\n 508:\t\tmt76_for_each_q_rx(\u0026dev-\u003emt76, i) {\n 509:\t\t\tnapi_enable(\u0026dev-\u003emt76.napi[i]);\n 510:\t\t}\n 511:\t\n 512:\t\tlocal_bh_disable();\n 513:\t\tnapi_schedule(\u0026dev-\u003emt76.tx_napi);\n 514:\t\tmt76_for_each_q_rx(\u0026dev-\u003emt76, i) {\n 515:\t\t\tnapi_schedule(\u0026dev-\u003emt76.napi[i]);\n 516:\t\t}\n 517:\t\tlocal_bh_enable();\n 518:\t\n 519:\t\tif (restart) {\n 520:\t\t\tset_bit(MT76_RESTART, \u0026dev-\u003emphy.state);\n 521:\t\t\tmt76x02_mcu_function_select(dev, Q_SELECT, 1);\n 522:\t\t\tieee80211_restart_hw(dev-\u003emt76.hw);\n 523:\t\t} else {\n 524:\t\t\tieee80211_wake_queues(dev-\u003emt76.hw);\n 525:\t\t\tmt76_txq_schedule_all(\u0026dev-\u003emphy);\n 526:\t\t}\n 527:\t}\n 528:\t\n 529:\tvoid mt76x02_reconfig_complete(struct ieee80211_hw *hw,\n 530:\t\t\t\t enum ieee80211_reconfig_type reconfig_type)\n 531:\t{\n 532:\t\tstruct mt76x02_dev *dev = hw-\u003epriv;\n 533:\t\n 534:\t\tif (reconfig_type != IEEE80211_RECONFIG_TYPE_RESTART)\n 535:\t\t\treturn;\n 536:\t\n 537:\t\tclear_bit(MT76_RESTART, \u0026dev-\u003emphy.state);\n 538:\t\tieee80211_wake_queues(hw);\n 539:\t}\n"
} |
| 17/2 | 2026/10/11 07:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 12427 output: 44 thoughts: 19 Thoughts: Okay, here's my take on those thoughts, tailored for an expert audience: **Analyzing the Mt76x02 Watchdog Reset** Alright, let's dive in. My immediate thought is, "What specifically *triggers* `mt76x02_watchdog_reset`?". I need to understand the call chain, the context, and most importantly, the *reasons* behind the watchdog intervention. This isn't just about finding the function's definition; I'm after the points in the code where this reset mechanism is deemed *necessary*. Are we talking about a timeout on an interrupt, a stalled DMA operation, a communication deadlock on the PCI bus, or some other internal state of the MT76x02 chip itself? I want to see the error conditions or the sequences of events that lead to this function being called. That's where the real insights lie, not just in the function's existence. I need to trace the execution path and identify the potential failure modes that this watchdog is designed to handle. A good understanding of this will lead to a better understanding of the stability of the device. Let's dig in and figure out why this reset is required. |
| 18/2 | 2026/10/11 07:57 | tool | grepper |
0mArgs:{
"Expression": "mt76x02_watchdog_reset",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=394=static void mt76x02_reset_state(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-433-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:434:static void mt76x02_watchdog_reset(struct mt76x02_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-435-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=542=static void mt76x02_check_tx_hang(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-549-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:550:\tmt76x02_watchdog_reset(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-551-\n"
} |
| 19/2 | 2026/10/11 07:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 13093 output: 45 thoughts: 23 Thoughts: Okay, let's dive into this. Here's my understanding, presented as a personal thought process, given my expertise: **Examining the Call Chain of `mt76x02_check_tx_hang`** Alright, so `mt76x02_check_tx_hang` is the function we're interested in. The natural question that pops into my head is: "Who's calling *this* little gem?". It's crucial, when tracking down potential issues in a driver, to understand the context. Knowing the call chain lets me see *why* and *when* this hang check is being performed. It tells me about the triggers and the higher-level logic that depends on the results of this function. So, first thing's first: let's go hunting and trace those calls. We need to dissect the call graph to truly understand its role in preventing hangups. |
| 20/2 | 2026/10/11 07:57 | tool | grepper |
0mArgs:{
"Expression": "mt76x02_check_tx_hang",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=540=EXPORT_SYMBOL_GPL(mt76x02_reconfig_complete);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-541-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:542:static void mt76x02_check_tx_hang(struct mt76x02_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-543-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=558=void mt76x02_wdt_work(struct work_struct *work)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-562-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:563:\tmt76x02_check_tx_hang(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-564-\n"
} |
| 21/2 | 2026/10/11 07:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 13694 output: 44 thoughts: 77 Thoughts: Okay, let's get down to brass tacks. **Investigating Driver Dependencies** Right, so I need to figure out exactly which drivers are *actually* utilizing code from `mt76x02_mmio.c`. More specifically, I'm interested in how `mt76x02_wdt_work` is being used, because if the WDT isn't used, the `mt76x02_mmio.c` is very, very unlikely to be used, and the goal is to reduce dependencies to increase testability. Time to fire up the search tools and see which drivers are compiling and linking that specific file, and if they're actually calling `mt76x02_wdt_work` or any other functions from that module. Let's start with a focused search for `mt76x02_wdt_work`. That should give me a good starting point. |
| 22/2 | 2026/10/11 07:57 | tool | grepper |
0mArgs:{
"Expression": "mt76x02_wdt_work",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/mt76x02.h=180=s8 mt76x02_tx_get_txpwr_adj(struct mt76x02_dev *dev, s8 txpwr,\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-181-\t\t\t s8 max_txpwr_adj);\ndrivers/net/wireless/mediatek/mt76/mt76x02.h:182:void mt76x02_wdt_work(struct work_struct *work);\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-183-void mt76x02_tx_set_txpwr_auto(struct mt76x02_dev *dev, s8 txpwr);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=542=static void mt76x02_check_tx_hang(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-557-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:558:void mt76x02_wdt_work(struct work_struct *work)\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-559-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c=140=int mt76x02_init_device(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c-158-\t} else {\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c:159:\t\tINIT_DELAYED_WORK(\u0026dev-\u003ewdt_work, mt76x02_wdt_work);\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c-160-\n"
} |
| 23/2 | 2026/10/11 07:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 14587 output: 43 thoughts: 18 Thoughts: Okay, here's my take on those thoughts, tailored for an expert audience and presented in the first person: **Diving into `mt76x02_init_device`** Alright, let's get down to it. My initial thought process is always a methodical one. I need to understand what's happening within `mt76x02_init_device`. Specifically, I want to trace the call graph to gain a clear picture of its role and dependencies within the larger `mt76x02` driver. I'll need to meticulously analyze the code within this function to see where it makes system calls. Then I will determine what it initialises, and what that data structure is. I'll be looking for any hints about hardware setup, register configuration, or potential points of interaction with the firmware or MAC/PHY layers, and of course, error handling. I want to see if any hardware is initialised, by looking for pointers to hardware registers, or calls to read them. This is especially true if there are initialisation or other functions in place. The devil is in the details, so I'll be focusing on every line. |
| 24/2 | 2026/10/11 07:57 | tool | grepper |
0mArgs:{
"Expression": "mt76x02_init_device",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/mt76x0/init.c=236=int mt76x0_register_device(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/init.c-239-\ndrivers/net/wireless/mediatek/mt76/mt76x0/init.c:240:\tret = mt76x02_init_device(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x0/init.c-241-\tif (ret)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02.h=149=extern struct ieee80211_rate mt76x02_rates[12];\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-150-\ndrivers/net/wireless/mediatek/mt76/mt76x02.h:151:int mt76x02_init_device(struct mt76x02_dev *dev);\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-152-void mt76x02_configure_filter(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c=128=mt76x02_led_set_brightness(struct led_classdev *led_cdev,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c-139-\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c:140:int mt76x02_init_device(struct mt76x02_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c-141-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c-201-}\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c:202:EXPORT_SYMBOL_GPL(mt76x02_init_device);\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c-203-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c=290=int mt76x2_register_device(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c-294-\tINIT_DELAYED_WORK(\u0026dev-\u003ecal_work, mt76x2_phy_calibrate);\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c:295:\tret = mt76x02_init_device(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c-296-\tif (ret)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c=190=int mt76x2u_register_device(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-197-\tINIT_DELAYED_WORK(\u0026dev-\u003ecal_work, mt76x2u_phy_calibrate);\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:198:\terr = mt76x02_init_device(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-199-\tif (err)\n"
} |
| 25/2 | 2026/10/11 07:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 15910 output: 51 thoughts: 105 Thoughts: Here's my analysis of the provided code snippet: **Diving into the MT76x02 Wireless Driver's Watchdog** Okay, hold on a second! My attention is immediately drawn to that line in `drivers/net/wireless/mediatek/mt76/mt76x02_util.c:158`. Specifically, that `INIT_DELAYED_WORK`. My gut tells me this is related to a watchdog timer. Let's dig in a bit further to confirm my suspicion. I'm now going to go back and examine the surrounding code in `mt76x02_util.c`, specifically around line 150. That if/else construct is my target – I need to understand the conditions under which this delayed work is being initialized. Understanding the logic behind the conditional initialization is crucial for understanding the overall control flow and potential failure scenarios that this watchdog is intended to address. I need to figure out when the `dev->wdt_work` is initialized and, more importantly, *why*. This will likely provide valuable context on how the driver handles potential hangs or other communication issues. |
| 26/2 | 2026/10/11 07:57 | tool | read-file |
0mArgs:{
"File": "drivers/net/wireless/mediatek/mt76/mt76x02_util.c",
"FirstLine": 145,
"LineCount": 30
}Results: {
"Contents": " 145:\t\tINIT_DELAYED_WORK(\u0026dev-\u003emphy.mac_work, mt76x02_mac_work);\n 146:\t\n 147:\t\thw-\u003equeues = 4;\n 148:\t\thw-\u003emax_rates = 1;\n 149:\t\thw-\u003emax_report_rates = 7;\n 150:\t\thw-\u003emax_rate_tries = 1;\n 151:\t\thw-\u003eextra_tx_headroom = 2;\n 152:\t\n 153:\t\tif (mt76_is_usb(\u0026dev-\u003emt76)) {\n 154:\t\t\thw-\u003eextra_tx_headroom += sizeof(struct mt76x02_txwi) +\n 155:\t\t\t\t\t\t MT_DMA_HDR_LEN;\n 156:\t\t\twiphy-\u003eiface_combinations = mt76x02u_if_comb;\n 157:\t\t\twiphy-\u003en_iface_combinations = ARRAY_SIZE(mt76x02u_if_comb);\n 158:\t\t} else {\n 159:\t\t\tINIT_DELAYED_WORK(\u0026dev-\u003ewdt_work, mt76x02_wdt_work);\n 160:\t\n 161:\t\t\tmt76x02_dfs_init_detector(dev);\n 162:\t\n 163:\t\t\twiphy-\u003ereg_notifier = mt76x02_regd_notifier;\n 164:\t\t\twiphy-\u003eiface_combinations = mt76x02_if_comb;\n 165:\t\t\twiphy-\u003en_iface_combinations = ARRAY_SIZE(mt76x02_if_comb);\n 166:\t\n 167:\t\t\t/* init led callbacks */\n 168:\t\t\tif (IS_ENABLED(CONFIG_MT76_LEDS)) {\n 169:\t\t\t\tdev-\u003emphy.leds.cdev.brightness_set =\n 170:\t\t\t\t\t\tmt76x02_led_set_brightness;\n 171:\t\t\t\tdev-\u003emphy.leds.cdev.blink_set = mt76x02_led_set_blink;\n 172:\t\t\t}\n 173:\t\t}\n 174:\t\n"
} |
| 27/2 | 2026/10/11 07:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 16889 output: 37 thoughts: 902 Thoughts: **Deep Dive into the mt76x02 Watchdog Implementation** Okay, here's what I'm thinking... it looks like the watchdog functionality within this mt76 driver is conditional. I see a check: `if (mt76_is_usb(&dev->mt76))`. If it's USB, the `wdt_work` is *not* initialized with `mt76x02_wdt_work`. But *else*, which I understand to mean PCI/MMIO/SoC devices, we initialize the `wdt_work` with `mt76x02_wdt_work`. That's the key difference. Now, my initial thought is: Is `mt76x02_mmio.c` exclusively for PCI/MMIO devices? The filename suggests it, but let's be sure. Let me see... I need to consider that the presence of the `.c` file is not definitive. Let me check the `Makefile`. Okay, here we go... it's included in `mt76x02-lib`. So, `mt76x02-lib` includes `mt76x02_mmio.o`, which is included on all versions of the driver. But, is a function like `mt76x02_key_sync` reachable on USB devices? That's what I need to figure out, and it will give me clarity. Let me find where `mt76x02_key_sync` is used... Found it. It's used in `mt76x02_reset_state`. Okay. Now, where is `mt76x02_reset_state` called? Checking... it appears to be called only in `mt76x02_watchdog_reset`. That's static. Hmm... `mt76x02_watchdog_reset` is also static, and it's called only within `mt76x02_check_tx_hang`. And `mt76x02_check_tx_hang` is static and called within `mt76x02_wdt_work`. Okay, that makes sense. And *that* function is ONLY set if it's *not* a USB device: `if (!mt76_is_usb)`. So, it looks like `mt76x02_wdt_work`, and consequently, `mt76x02_reset_state` and everything that trickles down from there, *are* indeed skipped for USB devices because of the conditional initialization of `wdt_work`. I have to do a deeper search in case I missed any edge cases! But at this point, it looks like the watchdog reset process is not executed on USB devices. The code path related to `mt76x02_mmio.c` is included in the USB, but the watchdog functionality is not used. |
| 28/2 | 2026/10/11 07:57 | tool | grepper |
0mArgs:{
"Expression": "wdt_work",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/mt76x02.h=87=struct mt76x02_dev {\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-105-\tstruct delayed_work cal_work;\ndrivers/net/wireless/mediatek/mt76/mt76x02.h:106:\tstruct delayed_work wdt_work;\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-107-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02.h=180=s8 mt76x02_tx_get_txpwr_adj(struct mt76x02_dev *dev, s8 txpwr,\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-181-\t\t\t s8 max_txpwr_adj);\ndrivers/net/wireless/mediatek/mt76/mt76x02.h:182:void mt76x02_wdt_work(struct work_struct *work);\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-183-void mt76x02_tx_set_txpwr_auto(struct mt76x02_dev *dev, s8 txpwr);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=542=static void mt76x02_check_tx_hang(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-557-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:558:void mt76x02_wdt_work(struct work_struct *work)\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-559-{\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-560-\tstruct mt76x02_dev *dev = container_of(work, struct mt76x02_dev,\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:561:\t\t\t\t\t wdt_work.work);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-562-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-564-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:565:\tieee80211_queue_delayed_work(mt76_hw(dev), \u0026dev-\u003ewdt_work,\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-566-\t\t\t\t MT_WATCHDOG_TIME);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c=140=int mt76x02_init_device(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c-158-\t} else {\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c:159:\t\tINIT_DELAYED_WORK(\u0026dev-\u003ewdt_work, mt76x02_wdt_work);\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c-160-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c=271=void mt76x2_stop_hardware(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c-274-\tcancel_delayed_work_sync(\u0026dev-\u003emphy.mac_work);\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c:275:\tcancel_delayed_work_sync(\u0026dev-\u003ewdt_work);\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c-276-\tclear_bit(MT76_RESTART, \u0026dev-\u003emphy.state);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_main.c=10=mt76x2_start(struct ieee80211_hw *hw)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_main.c-18-\t\t\t\t MT_MAC_WORK_INTERVAL);\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_main.c:19:\tieee80211_queue_delayed_work(mt76_hw(dev), \u0026dev-\u003ewdt_work,\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_main.c-20-\t\t\t\t MT_WATCHDOG_TIME);\n"
} |
| 29/2 | 2026/10/11 07:57 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 19840 output: 37 thoughts: 118 Thoughts: **Investigating the `wdt_work` Queueing** Okay, so `wdt_work` is only being queued in a couple of places: specifically, `drivers/net/wireless/mediatek/mt76/mt76x2/pci_main.c:19` and then it's self-queued in `mt76x02_mmio.c:565`. That's a limited scope, which is good. But wait a second... is the `mt76x2` driver *solely* for PCI devices? I need to clarify that. If it's only PCI, that narrows the scope of investigation significantly. Right, so what specific devices are using `mt76x2`? That's the next logical step. I'll need to know which hardware is actually affected by this. Let me check the `Kconfig` file for the `mt76x2` driver: `drivers/net/wireless/mediatek/mt76/mt76x2/Kconfig`. That should provide the answers. |
| 30/2 | 2026/10/11 07:58 | tool | grepper |
0mArgs:{
"Expression": "config MT76",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/Kconfig-1-# SPDX-License-Identifier: BSD-3-Clause-Clear\ndrivers/net/wireless/mediatek/mt76/Kconfig:2:config MT76_CORE\ndrivers/net/wireless/mediatek/mt76/Kconfig-3-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/Kconfig-5-\ndrivers/net/wireless/mediatek/mt76/Kconfig:6:config MT76_LEDS\ndrivers/net/wireless/mediatek/mt76/Kconfig-7-\tbool\n--\ndrivers/net/wireless/mediatek/mt76/Kconfig-11-\ndrivers/net/wireless/mediatek/mt76/Kconfig:12:config MT76_USB\ndrivers/net/wireless/mediatek/mt76/Kconfig-13-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/Kconfig-15-\ndrivers/net/wireless/mediatek/mt76/Kconfig:16:config MT76_SDIO\ndrivers/net/wireless/mediatek/mt76/Kconfig-17-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/Kconfig-19-\ndrivers/net/wireless/mediatek/mt76/Kconfig:20:config MT76x02_LIB\ndrivers/net/wireless/mediatek/mt76/Kconfig-21-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/Kconfig-23-\ndrivers/net/wireless/mediatek/mt76/Kconfig:24:config MT76x02_USB\ndrivers/net/wireless/mediatek/mt76/Kconfig-25-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/Kconfig-27-\ndrivers/net/wireless/mediatek/mt76/Kconfig:28:config MT76_CONNAC_LIB\ndrivers/net/wireless/mediatek/mt76/Kconfig-29-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/Kconfig=36=config MT792x_USB\n--\ndrivers/net/wireless/mediatek/mt76/Kconfig-39-\ndrivers/net/wireless/mediatek/mt76/Kconfig:40:config MT76_NPU\ndrivers/net/wireless/mediatek/mt76/Kconfig-41-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/mt7603/Kconfig-1-# SPDX-License-Identifier: BSD-3-Clause-Clear\ndrivers/net/wireless/mediatek/mt76/mt7603/Kconfig:2:config MT7603E\ndrivers/net/wireless/mediatek/mt76/mt7603/Kconfig-3-\ttristate \"MediaTek MT7603E (PCIe) and MT76x8 WLAN support\"\n--\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig-2-\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig:3:config MT7615_COMMON\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig-4-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig-7-\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig:8:config MT7615E\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig-9-\ttristate \"MediaTek MT7615E and MT7663E (PCIe) support\"\n--\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig-20-\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig:21:config MT7622_WMAC\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig-22-\tbool \"MT7622 (SoC) WMAC support\"\n--\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig-31-\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig:32:config MT7663_USB_SDIO_COMMON\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig-33-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig-35-\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig:36:config MT7663U\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig-37-\ttristate \"MediaTek MT7663U (USB) support\"\n--\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig-46-\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig:47:config MT7663S\ndrivers/net/wireless/mediatek/mt76/mt7615/Kconfig-48-\ttristate \"MediaTek MT7663S (SDIO) support\"\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig-1-# SPDX-License-Identifier: GPL-2.0-only\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig:2:config MT76x0_COMMON\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig-3-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig-5-\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig:6:config MT76x0U\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig-7-\ttristate \"MediaTek MT76x0U (USB) support\"\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig-18-\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig:19:config MT76x0E\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig-20-\ttristate \"MediaTek MT76x0E (PCIe) support\"\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig-1-# SPDX-License-Identifier: BSD-3-Clause-Clear\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig:2:config MT76x2_COMMON\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig-3-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig-5-\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig:6:config MT76x2E\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig-7-\ttristate \"MediaTek MT76x2E (PCIe) support\"\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig-17-\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig:18:config MT76x2U\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig-19-\ttristate \"MediaTek MT76x2U (USB) support\"\n"
} |
| 31/2 | 2026/10/11 07:58 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 22218 output: 51 thoughts: 535 Thoughts: **Investigating MT76x0U/MT76x2U and mt76x02_mmio.c** Alright, let's get to the bottom of this. I need to determine if the `mt76x02_mmio.c` file is actually relevant to the MT76x0U or MT76x2U USB variants. My initial hunch is that it might be PCIe or SoC specific, but I need to confirm. First step, let's check the build system. A quick look at the `mt76/Makefile` is in order. Aha! I see: ```make obj-$(CONFIG_MT76_SDIO) += mt76-sdio.o obj-$(CONFIG_MT76x02_LIB) += mt76x02-lib.o obj-$(CONFIG_MT76x02_USB) += mt76x02-usb.o ``` and... ```make mt76x02-lib-y := mt76x02_util.o mt76x02_mac.o mt76x02_mcu.o \ mt76x02_eeprom.o mt76x02_phy.o mt76x02_mmio.o \ mt76x02_txrx.o mt76x02_trace.o mt76x02_debugfs.o \ mt76x02_dfs.o ``` So, `mt76x02-lib` is built when `CONFIG_MT76x02_LIB` is enabled. Good. And, after a review of the configuration hierarchy, I'm pretty sure `CONFIG_MT76x02_LIB` is selected by `MT76x0_COMMON` and `MT76x2_COMMON`. Those are selected by the various revisions, including the USB revisions. Okay, so the makefile suggests the MMIO code *could* be included. Now, I need to know definitively: does MT76x0U or MT76x2U actually *use* anything in `mt76x02_mmio.c`? That's the key question. Time to delve into the file itself. I'm going to read through `mt76x02_mmio.c` and understand its purpose and scope. Let's see... I'll check its length and scan its symbols to get a quick overview of what's implemented within. |
| 32/2 | 2026/10/11 07:58 | tool | read-file |
0mArgs:{
"File": "drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c",
"FirstLine": 1,
"LineCount": 100
}Results: {
"Contents": " 1:\t// SPDX-License-Identifier: BSD-3-Clause-Clear\n 2:\t/*\n 3:\t * Copyright (C) 2016 Felix Fietkau \u003cnbd@nbd.name\u003e\n 4:\t * Copyright (C) 2018 Lorenzo Bianconi \u003clorenzo.bianconi83@gmail.com\u003e\n 5:\t */\n 6:\t\n 7:\t#include \u003clinux/kernel.h\u003e\n 8:\t#include \u003clinux/irq.h\u003e\n 9:\t\n 10:\t#include \"mt76x02.h\"\n 11:\t#include \"mt76x02_mcu.h\"\n 12:\t#include \"trace.h\"\n 13:\t\n 14:\tstatic void mt76x02_pre_tbtt_tasklet(struct tasklet_struct *t)\n 15:\t{\n 16:\t\tstruct mt76x02_dev *dev = from_tasklet(dev, t, mt76.pre_tbtt_tasklet);\n 17:\t\tstruct mt76_dev *mdev = \u0026dev-\u003emt76;\n 18:\t\tstruct mt76_queue *q = dev-\u003emphy.q_tx[MT_TXQ_PSD];\n 19:\t\tstruct beacon_bc_data data = {\n 20:\t\t\t.dev = dev,\n 21:\t\t};\n 22:\t\tstruct sk_buff *skb;\n 23:\t\tint i;\n 24:\t\n 25:\t\tif (dev-\u003emphy.offchannel)\n 26:\t\t\treturn;\n 27:\t\n 28:\t\t__skb_queue_head_init(\u0026data.q);\n 29:\t\n 30:\t\tmt76x02_resync_beacon_timer(dev);\n 31:\t\n 32:\t\t/* Prevent corrupt transmissions during update */\n 33:\t\tmt76_set(dev, MT_BCN_BYPASS_MASK, 0xffff);\n 34:\t\tdev-\u003ebeacon_data_count = 0;\n 35:\t\n 36:\t\tieee80211_iterate_active_interfaces_atomic(mt76_hw(dev),\n 37:\t\t\tIEEE80211_IFACE_ITER_RESUME_ALL,\n 38:\t\t\tmt76x02_update_beacon_iter, \u0026data);\n 39:\t\n 40:\t\twhile ((skb = __skb_dequeue(\u0026data.q)) != NULL)\n 41:\t\t\tmt76x02_mac_set_beacon(dev, skb);\n 42:\t\n 43:\t\tmt76_wr(dev, MT_BCN_BYPASS_MASK,\n 44:\t\t\t0xff00 | ~(0xff00 \u003e\u003e dev-\u003ebeacon_data_count));\n 45:\t\n 46:\t\tmt76_csa_check(mdev);\n 47:\t\n 48:\t\tif (mdev-\u003ecsa_complete)\n 49:\t\t\treturn;\n 50:\t\n 51:\t\tmt76x02_enqueue_buffered_bc(dev, \u0026data, 8);\n 52:\t\n 53:\t\tif (!skb_queue_len(\u0026data.q))\n 54:\t\t\treturn;\n 55:\t\n 56:\t\tfor (i = 0; i \u003c ARRAY_SIZE(data.tail); i++) {\n 57:\t\t\tif (!data.tail[i])\n 58:\t\t\t\tcontinue;\n 59:\t\n 60:\t\t\tmt76_skb_set_moredata(data.tail[i], false);\n 61:\t\t}\n 62:\t\n 63:\t\tspin_lock(\u0026q-\u003elock);\n 64:\t\twhile ((skb = __skb_dequeue(\u0026data.q)) != NULL) {\n 65:\t\t\tstruct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);\n 66:\t\t\tstruct ieee80211_vif *vif = info-\u003econtrol.vif;\n 67:\t\t\tstruct mt76x02_vif *mvif = (struct mt76x02_vif *)vif-\u003edrv_priv;\n 68:\t\n 69:\t\t\tmt76_tx_queue_skb(dev, q, MT_TXQ_PSD, skb, \u0026mvif-\u003egroup_wcid,\n 70:\t\t\t\t\t NULL);\n 71:\t\t}\n 72:\t\tspin_unlock(\u0026q-\u003elock);\n 73:\t}\n 74:\t\n 75:\tstatic void mt76x02e_pre_tbtt_enable(struct mt76x02_dev *dev, bool en)\n 76:\t{\n 77:\t\tif (en)\n 78:\t\t\ttasklet_enable(\u0026dev-\u003emt76.pre_tbtt_tasklet);\n 79:\t\telse\n 80:\t\t\ttasklet_disable(\u0026dev-\u003emt76.pre_tbtt_tasklet);\n 81:\t}\n 82:\t\n 83:\tstatic void mt76x02e_beacon_enable(struct mt76x02_dev *dev, bool en)\n 84:\t{\n 85:\t\tmt76_rmw_field(dev, MT_INT_TIMER_EN, MT_INT_TIMER_EN_PRE_TBTT_EN, en);\n 86:\t\tif (en)\n 87:\t\t\tmt76x02_irq_enable(dev, MT_INT_PRE_TBTT | MT_INT_TBTT);\n 88:\t\telse\n 89:\t\t\tmt76x02_irq_disable(dev, MT_INT_PRE_TBTT | MT_INT_TBTT);\n 90:\t}\n 91:\t\n 92:\tvoid mt76x02e_init_beacon_config(struct mt76x02_dev *dev)\n 93:\t{\n 94:\t\tstatic const struct mt76x02_beacon_ops beacon_ops = {\n 95:\t\t\t.nslots = 8,\n 96:\t\t\t.slot_size = 1024,\n 97:\t\t\t.pre_tbtt_enable = mt76x02e_pre_tbtt_enable,\n 98:\t\t\t.beacon_enable = mt76x02e_beacon_enable,\n 99:\t\t};\n 100:\t\n"
} |
| 33/2 | 2026/10/11 07:58 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 25025 output: 53 thoughts: 30 Thoughts: Okay, here's my interpretation of what's going on in those lines of `mt76x02_mmio.c`, from lines 101 to 200: **Diving Deep into the Register Initialization** Alright, let's get into the nitty-gritty of how this driver configures the MT76x02's memory-mapped I/O. I'm focusing specifically on lines 101 through 200 now. It appears we are dealing with the initial setup phase. I see a lot of register writes happening here. It's a fundamental part of bring-up. The process probably involves setting up clocks, enabling different functional blocks, configuring interrupt masks, and perhaps even some initial power-saving configurations or pre-calibrations. Given the context of MMIO, I anticipate that these register operations are the primary method of communicating with the hardware. There's probably a sequence, a specific order they are done in that is critical for the device to function correctly. I'll need to pay close attention to that. Are there any dependencies? Does the device documentation specify particular initialisation sequences? I'm mentally mapping the register addresses to the corresponding hardware functions. I need to understand what bits are being set and why. This likely involves some bitwise operations, setting, clearing, and potentially reading-modify-write sequences. I'm looking for any obvious patterns or grouping, which might suggest logical blocks being enabled or configured together. It is possible that these are configuration of the PHY, MAC or perhaps DMA engines. I'm anticipating that this is the section where the driver brings the hardware into a known state, before handing over to other modules or higher-level functions, such as the initialization of the firmware, or the bring-up of the wireless interface. I'll be keeping an eye out for any specific error-handling or retry mechanisms. If something goes wrong during the initialisation sequence, how is it handled? I'm hoping it's robust. If there is a need to debug, I can probe the registers directly. Essentially, I'm trying to build a mental model of this initialisation process, understanding the purpose of each register write and how it contributes to the overall functioning of the MT76x02 chipset. |
| 34/2 | 2026/10/11 07:58 | tool | read-file |
0mArgs:{
"File": "drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c",
"FirstLine": 101,
"LineCount": 100
}Results: {
"Contents": " 101:\t\tdev-\u003ebeacon_ops = \u0026beacon_ops;\n 102:\t\n 103:\t\t/* Fire a pre-TBTT interrupt 8 ms before TBTT */\n 104:\t\tmt76_rmw_field(dev, MT_INT_TIMER_CFG, MT_INT_TIMER_CFG_PRE_TBTT,\n 105:\t\t\t 8 \u003c\u003c 4);\n 106:\t\tmt76_rmw_field(dev, MT_INT_TIMER_CFG, MT_INT_TIMER_CFG_GP_TIMER,\n 107:\t\t\t MT_DFS_GP_INTERVAL);\n 108:\t\tmt76_wr(dev, MT_INT_TIMER_EN, 0);\n 109:\t\n 110:\t\tmt76x02_init_beacon_config(dev);\n 111:\t}\n 112:\tEXPORT_SYMBOL_GPL(mt76x02e_init_beacon_config);\n 113:\t\n 114:\tstatic int\n 115:\tmt76x02_init_rx_queue(struct mt76x02_dev *dev, struct mt76_queue *q,\n 116:\t\t\t int idx, int n_desc, int bufsize)\n 117:\t{\n 118:\t\tint err;\n 119:\t\n 120:\t\terr = mt76_queue_alloc(dev, q, idx, n_desc, bufsize,\n 121:\t\t\t\t MT_RX_RING_BASE);\n 122:\t\tif (err \u003c 0)\n 123:\t\t\treturn err;\n 124:\t\n 125:\t\tmt76x02_irq_enable(dev, MT_INT_RX_DONE(idx));\n 126:\t\n 127:\t\treturn 0;\n 128:\t}\n 129:\t\n 130:\tstatic void mt76x02_process_tx_status_fifo(struct mt76x02_dev *dev)\n 131:\t{\n 132:\t\tstruct mt76x02_tx_status stat;\n 133:\t\tu8 update = 1;\n 134:\t\n 135:\t\twhile (kfifo_get(\u0026dev-\u003etxstatus_fifo, \u0026stat))\n 136:\t\t\tmt76x02_send_tx_status(dev, \u0026stat, \u0026update);\n 137:\t}\n 138:\t\n 139:\tstatic void mt76x02_tx_worker(struct mt76_worker *w)\n 140:\t{\n 141:\t\tstruct mt76x02_dev *dev;\n 142:\t\n 143:\t\tdev = container_of(w, struct mt76x02_dev, mt76.tx_worker);\n 144:\t\n 145:\t\tmt76x02_mac_poll_tx_status(dev, false);\n 146:\t\tmt76x02_process_tx_status_fifo(dev);\n 147:\t\n 148:\t\tmt76_txq_schedule_all(\u0026dev-\u003emphy);\n 149:\t}\n 150:\t\n 151:\tstatic int mt76x02_poll_tx(struct napi_struct *napi, int budget)\n 152:\t{\n 153:\t\tstruct mt76x02_dev *dev = container_of(napi, struct mt76x02_dev,\n 154:\t\t\t\t\t\t mt76.tx_napi);\n 155:\t\tint i;\n 156:\t\n 157:\t\tmt76x02_mac_poll_tx_status(dev, false);\n 158:\t\n 159:\t\tmt76_queue_tx_cleanup(dev, dev-\u003emt76.q_mcu[MT_MCUQ_WM], false);\n 160:\t\tfor (i = MT_TXQ_PSD; i \u003e= 0; i--)\n 161:\t\t\tmt76_queue_tx_cleanup(dev, dev-\u003emphy.q_tx[i], false);\n 162:\t\n 163:\t\tif (napi_complete_done(napi, 0))\n 164:\t\t\tmt76x02_irq_enable(dev, MT_INT_TX_DONE_ALL);\n 165:\t\n 166:\t\tmt76_queue_tx_cleanup(dev, dev-\u003emt76.q_mcu[MT_MCUQ_WM], false);\n 167:\t\tfor (i = MT_TXQ_PSD; i \u003e= 0; i--)\n 168:\t\t\tmt76_queue_tx_cleanup(dev, dev-\u003emphy.q_tx[i], false);\n 169:\t\n 170:\t\tmt76_worker_schedule(\u0026dev-\u003emt76.tx_worker);\n 171:\t\n 172:\t\treturn 0;\n 173:\t}\n 174:\t\n 175:\tint mt76x02_dma_init(struct mt76x02_dev *dev)\n 176:\t{\n 177:\t\tint i, ret, fifo_size;\n 178:\t\tstruct mt76_queue *q;\n 179:\t\tvoid *status_fifo;\n 180:\t\n 181:\t\tBUILD_BUG_ON(sizeof(struct mt76x02_rxwi) \u003e MT_RX_HEADROOM);\n 182:\t\n 183:\t\tfifo_size = roundup_pow_of_two(32 * sizeof(struct mt76x02_tx_status));\n 184:\t\tstatus_fifo = devm_kzalloc(dev-\u003emt76.dev, fifo_size, GFP_KERNEL);\n 185:\t\tif (!status_fifo)\n 186:\t\t\treturn -ENOMEM;\n 187:\t\n 188:\t\tdev-\u003emt76.tx_worker.fn = mt76x02_tx_worker;\n 189:\t\ttasklet_setup(\u0026dev-\u003emt76.pre_tbtt_tasklet, mt76x02_pre_tbtt_tasklet);\n 190:\t\n 191:\t\tspin_lock_init(\u0026dev-\u003etxstatus_fifo_lock);\n 192:\t\tkfifo_init(\u0026dev-\u003etxstatus_fifo, status_fifo, fifo_size);\n 193:\t\n 194:\t\tmt76_dma_attach(\u0026dev-\u003emt76);\n 195:\t\n 196:\t\tmt76_wr(dev, MT_WPDMA_RST_IDX, ~0);\n 197:\t\n 198:\t\tfor (i = 0; i \u003c IEEE80211_NUM_ACS; i++) {\n 199:\t\t\tret = mt76_init_tx_queue(\u0026dev-\u003emphy, i, mt76_ac_to_hwq(i),\n 200:\t\t\t\t\t\t MT76x02_TX_RING_SIZE,\n"
} |
| 35/2 | 2026/10/11 07:58 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 27435 output: 58 thoughts: 35 Thoughts: Okay, here's my take on those thoughts, tailored for an expert audience: **Analyzing `mt76x02_dma_init` and `mt76x02e_init_beacon_config`** Alright, let's dive in. My immediate focus is on understanding the interaction between `mt76x02_dma_init` and `mt76x02e_init_beacon_config`. I need to figure out the initialization sequence and how they depend on each other, specifically in the context of the MT76x02 chipset. What data structures are being set up by `mt76x02_dma_init` that `mt76x02e_init_beacon_config` might be consuming or relying on? I’m guessing `mt76x02_dma_init` is responsible for setting up the DMA engine, potentially allocating and configuring DMA descriptors, buffer pools, and any related interrupt handlers. Does it handle descriptor ring initialization, link lists or any memory management? Is it platform dependent (PCIe, SDIO, etc.) and thus configuring specific DMA channels or registers? The specific context and registers are the important part for me. Then, regarding `mt76x02e_init_beacon_config`, I'm looking at how beacon configuration interacts with the DMA setup. Does this function configure the DMA engine to handle beacon transmission? Are we talking about setting up specific DMA transfers for the beacon frame, or is it more related to configuring the hardware registers that define the beacon content and timing? Does it just populate a buffer? Does it setup a timer, or a specific beacon-related interrupt? I also need to check for any potential race conditions or timing dependencies. Does `mt76x02e_init_beacon_config` assume a specific state of the DMA engine after `mt76x02_dma_init` completes? Are there any shared resources (memory regions, hardware registers) that need proper synchronization? Ultimately, I'm trying to build a mental map of how these two functions contribute to the overall initialization flow and the operation of the wireless interface, so I can know the functions and their components well. I'll need to look at the function calls and the data flow to be sure. |
| 36/2 | 2026/10/11 07:58 | tool | grepper |
0mArgs:{
"Expression": "mt76x02_dma_init|mt76x02e_init_beacon_config",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/mt76x0/pci.c=95=static int mt76x0e_init_hardware(struct mt76x02_dev *dev, bool resume)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-108-\tif (!resume) {\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c:109:\t\terr = mt76x02_dma_init(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-110-\t\tif (err \u003c 0)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-117-\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c:118:\tmt76x02e_init_beacon_config(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-119-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02.h=215=void mt76x02_init_beacon_config(struct mt76x02_dev *dev);\ndrivers/net/wireless/mediatek/mt76/mt76x02.h:216:void mt76x02e_init_beacon_config(struct mt76x02_dev *dev);\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-217-void mt76x02_resync_beacon_timer(struct mt76x02_dev *dev);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_dma.h=54=mt76x02_wait_for_wpdma(struct mt76_dev *dev, int timeout)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_dma.h-61-\ndrivers/net/wireless/mediatek/mt76/mt76x02_dma.h:62:int mt76x02_dma_init(struct mt76x02_dev *dev);\ndrivers/net/wireless/mediatek/mt76/mt76x02_dma.h-63-void mt76x02_dma_disable(struct mt76x02_dev *dev);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=83=static void mt76x02e_beacon_enable(struct mt76x02_dev *dev, bool en)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-91-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:92:void mt76x02e_init_beacon_config(struct mt76x02_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-93-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-111-}\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:112:EXPORT_SYMBOL_GPL(mt76x02e_init_beacon_config);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-113-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=151=static int mt76x02_poll_tx(struct napi_struct *napi, int budget)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-174-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:175:int mt76x02_dma_init(struct mt76x02_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-176-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-246-}\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:247:EXPORT_SYMBOL_GPL(mt76x02_dma_init);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-248-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c=70=int mt76x2_mac_reset(struct mt76x02_dev *dev, bool hard)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c-112-\tmt76x02_mac_setaddr(dev, macaddr);\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c:113:\tmt76x02e_init_beacon_config(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c-114-\tif (!hard)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c=237=static int mt76x2_init_hardware(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c-254-\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c:255:\tret = mt76x02_dma_init(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c-256-\tif (ret)\n"
} |
| 37/2 | 2026/10/11 07:58 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 29615 output: 92 thoughts: 877 Thoughts: **Analyzing MT76x02 MMIO Module Calls** Okay, so I'm looking at how the `mt76x02_dma_init` function is used. It's called from both `mt76x0/pci.c` and `mt76x2/pci_init.c`, both around line 100-260, which, of course, are both PCIe initialization paths. That makes sense. Now, let's drill down into `mt76x02_mmio.c` itself to get a complete picture. I need to understand the relationship between this `dma_init` and everything else in this file. Let's methodically check each function: `mt76x02_pre_tbtt_tasklet` is setup in `mt76x02_dma_init`, `mt76x02e_pre_tbtt_enable` and `mt76x02e_beacon_enable` are used in `beacon_ops` within `mt76x02e_init_beacon_config`, and this `init_beacon_config` is called from the same pci files as `dma_init`. `mt76x02_init_rx_queue` is also called by `dma_init`, as is `mt76x02_tx_worker` (which itself calls `mt76x02_process_tx_status_fifo`). `mt76x02_poll_tx` is a NAPI handler. OK. Now, that's the setup, now to see what else is being called from the outside. I see that `mt76x02_rx_poll_complete`, `mt76x02_irq_handler`, `mt76x02_dma_disable`, `mt76x02_mac_start`, and `mt76x02_reconfig_complete` are all exported functions. That means they are used outside this file. I need to track those calls down. The rest of the static functions appear to relate to internal state management, watchdog resets and TX hang detection: `mt76x02_tx_hang` in `mt76x02_check_tx_hang`, `mt76x02_key_sync` in `mt76x02_reset_state`, `mt76x02_reset_state` in `mt76x02_watchdog_reset`, `mt76x02_watchdog_reset` in `mt76x02_check_tx_hang`, `mt76x02_check_tx_hang` in `mt76x02_wdt_work` and finally, `mt76x02_wdt_work` is a delayed work in `mt76x02_util.c`, but only for non-USB devices, as expected. So, the next step is to pinpoint the callers of those exported functions: `mt76x02_rx_poll_complete`, `mt76x02_irq_handler`, `mt76x02_dma_disable`, `mt76x02_mac_start`, and `mt76x02_reconfig_complete`. That's where the real integration lies. |
| 38/2 | 2026/10/11 07:58 | tool | grepper |
0mArgs:{
"Expression": "mt76x02_rx_poll_complete|mt76x02_irq_handler|mt76x02_dma_disable|mt76x02_mac_start|mt76x02_reconfig_complete",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/mt76x0/pci.c=13=static int mt76x0e_start(struct ieee80211_hw *hw)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-16-\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c:17:\tmt76x02_mac_start(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-18-\tmt76x0_phy_calibrate(dev, true);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c=61=static const struct ieee80211_ops mt76x0e_ops = {\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-90-\t.get_antenna = mt76_get_antenna,\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c:91:\t.reconfig_complete = mt76x02_reconfig_complete,\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-92-\t.set_sar_specs = mt76x0_set_sar_specs,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c=95=static int mt76x0e_init_hardware(struct mt76x02_dev *dev, bool resume)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-102-\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c:103:\tmt76x02_dma_disable(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-104-\terr = mt76x0e_mcu_init(dev);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c=154=mt76x0e_probe(struct pci_dev *pdev, const struct pci_device_id *id)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-166-\t\t.rx_skb = mt76x02_queue_rx_skb,\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c:167:\t\t.rx_poll_complete = mt76x02_rx_poll_complete,\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-168-\t\t.sta_ps = mt76x02_sta_ps,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-206-\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c:207:\tret = devm_request_irq(mdev-\u003edev, pdev-\u003eirq, mt76x02_irq_handler,\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-208-\t\t\t IRQF_SHARED, KBUILD_MODNAME, dev);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c=246=static int mt76x0e_suspend(struct pci_dev *pdev, pm_message_t state)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-261-\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c:262:\tmt76x02_dma_disable(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-263-\tmt76x02_mcu_cleanup(dev);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02.h=190=void mt76x02_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-191-\t\t\t struct sk_buff *skb, u32 *info);\ndrivers/net/wireless/mediatek/mt76/mt76x02.h:192:void mt76x02_rx_poll_complete(struct mt76_dev *mdev, enum mt76_rxq_id q);\ndrivers/net/wireless/mediatek/mt76/mt76x02.h:193:irqreturn_t mt76x02_irq_handler(int irq, void *dev_instance);\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-194-void mt76x02_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02.h=203=void mt76x02_bss_info_changed(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-205-\t\t\t struct ieee80211_bss_conf *info, u64 changed);\ndrivers/net/wireless/mediatek/mt76/mt76x02.h:206:void mt76x02_reconfig_complete(struct ieee80211_hw *hw,\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-207-\t\t\t enum ieee80211_reconfig_type reconfig_type);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02.h=219=void mt76x02_enqueue_buffered_bc(struct mt76x02_dev *dev,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-222-\ndrivers/net/wireless/mediatek/mt76/mt76x02.h:223:void mt76x02_mac_start(struct mt76x02_dev *dev);\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-224-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_dma.h=62=int mt76x02_dma_init(struct mt76x02_dev *dev);\ndrivers/net/wireless/mediatek/mt76/mt76x02_dma.h:63:void mt76x02_dma_disable(struct mt76x02_dev *dev);\ndrivers/net/wireless/mediatek/mt76/mt76x02_dma.h-64-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=247=EXPORT_SYMBOL_GPL(mt76x02_dma_init);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-248-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:249:void mt76x02_rx_poll_complete(struct mt76_dev *mdev, enum mt76_rxq_id q)\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-250-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-255-}\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:256:EXPORT_SYMBOL_GPL(mt76x02_rx_poll_complete);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-257-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:258:irqreturn_t mt76x02_irq_handler(int irq, void *dev_instance)\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-259-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-305-}\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:306:EXPORT_SYMBOL_GPL(mt76x02_irq_handler);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-307-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=308=static void mt76x02_dma_enable(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-323-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:324:void mt76x02_dma_disable(struct mt76x02_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-325-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-333-}\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:334:EXPORT_SYMBOL_GPL(mt76x02_dma_disable);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-335-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:336:void mt76x02_mac_start(struct mt76x02_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-337-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-347-}\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:348:EXPORT_SYMBOL_GPL(mt76x02_mac_start);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-349-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=434=static void mt76x02_watchdog_reset(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-487-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:488:\tmt76x02_mac_start(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-489-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-528-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:529:void mt76x02_reconfig_complete(struct ieee80211_hw *hw,\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-530-\t\t\t enum ieee80211_reconfig_type reconfig_type)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-539-}\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:540:EXPORT_SYMBOL_GPL(mt76x02_reconfig_complete);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-541-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci.c=20=mt76x2e_probe(struct pci_dev *pdev, const struct pci_device_id *id)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci.c-32-\t\t.rx_skb = mt76x02_queue_rx_skb,\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci.c:33:\t\t.rx_poll_complete = mt76x02_rx_poll_complete,\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci.c-34-\t\t.sta_ps = mt76x02_sta_ps,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci.c-69-\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci.c:70:\tret = devm_request_irq(mdev-\u003edev, pdev-\u003eirq, mt76x02_irq_handler,\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci.c-71-\t\t\t IRQF_SHARED, KBUILD_MODNAME, dev);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c=220=int mt76x2_resume_device(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c-223-\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c:224:\tmt76x02_dma_disable(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c-225-\tmt76x2_reset_wlan(dev, true);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c-231-\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c:232:\tmt76x02_mac_start(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c-233-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c=237=static int mt76x2_init_hardware(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c-240-\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c:241:\tmt76x02_dma_disable(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c-242-\tmt76x2_reset_wlan(dev, true);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c-259-\tset_bit(MT76_STATE_INITIALIZED, \u0026dev-\u003emphy.state);\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c:260:\tmt76x02_mac_start(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c-261-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_main.c=10=mt76x2_start(struct ieee80211_hw *hw)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_main.c-13-\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_main.c:14:\tmt76x02_mac_start(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_main.c-15-\tmt76x2_phy_start(dev);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_main.c=123=const struct ieee80211_ops mt76x2_ops = {\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_main.c-153-\t.set_rts_threshold = mt76x02_set_rts_threshold,\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_main.c:154:\t.reconfig_complete = mt76x02_reconfig_complete,\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci_main.c-155-\t.set_sar_specs = mt76x2_set_sar_specs,\n"
} |
| 39/2 | 2026/10/11 07:58 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 35911 output: 129 thoughts: 154 Thoughts: **Investigating the `mt76x02_mmio.c` Callers** Okay, here's what I'm seeing. It looks like every single function in `mt76x02_mmio.c` is exclusively called from the PCI drivers, specifically within `mt76x0/pci.c`, `mt76x2/pci.c`, `mt76x2/pci_init.c`, and `mt76x2/pci_main.c`. That's a pretty strong indication of a dedicated PCI-centric architecture for this module. But wait a minute... I need to be absolutely sure. Is there *any* chance that a USB driver or some other module is calling into this `mt76x02_mmio.c` file? My initial scan doesn't look promising, but let's not jump to conclusions. I'll need to confirm this definitively. Time to do a thorough grep search. I'm going to look for any mention of `mt76x02_` within the `mt76x0` and `mt76x2` USB-related files. This should give me a complete picture of the dependencies, making sure I'm not missing anything. |
| 40/2 | 2026/10/11 07:58 | tool | grepper |
0mArgs:{
"Expression": "mt76x02_",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76/mt76x0/usb.c",
"drivers/net/wireless/mediatek/mt76/mt76x2/usb.c",
"drivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c",
"drivers/net/wireless/mediatek/mt76/mt76x2/usb_main.c"
]
}Results: {
"Output": "\nFull output is too long, showing 200 out of 279 lines.\nUse more precise expression or PathPrefixes if possible.\n\nNumber of matching lines per file (4 files in total):\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:31\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c:12\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:25\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_main.c:18\n\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-11-#include \"mcu.h\"\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:12:#include \"../mt76x02_usb.h\"\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-13-\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c=14=static struct usb_device_id mt76x0_device_table[] = {\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-45-\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:46:static void mt76x0_init_usb_dma(struct mt76x02_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-47-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-72-\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:73:static void mt76x0u_cleanup(struct mt76x02_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-74-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c=80=static void mt76x0u_stop(struct ieee80211_hw *hw, bool suspend)\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-81-{\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:82:\tstruct mt76x02_dev *dev = hw-\u003epriv;\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-83-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c=102=static int mt76x0u_start(struct ieee80211_hw *hw)\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-103-{\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:104:\tstruct mt76x02_dev *dev = hw-\u003epriv;\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-105-\tint ret;\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c=120=static const struct ieee80211_ops mt76x0u_ops = {\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-124-\t.switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:125:\t.tx = mt76x02_tx,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-126-\t.start = mt76x0u_start,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-127-\t.stop = mt76x0u_stop,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:128:\t.add_interface = mt76x02_add_interface,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:129:\t.remove_interface = mt76x02_remove_interface,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-130-\t.config = mt76x0_config,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:131:\t.configure_filter = mt76x02_configure_filter,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:132:\t.bss_info_changed = mt76x02_bss_info_changed,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-133-\t.sta_state = mt76_sta_state,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-134-\t.sta_pre_rcu_remove = mt76_sta_pre_rcu_remove,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:135:\t.set_key = mt76x02_set_key,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:136:\t.conf_tx = mt76x02_conf_tx,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-137-\t.sw_scan_start = mt76_sw_scan,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:138:\t.sw_scan_complete = mt76x02_sw_scan_complete,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:139:\t.ampdu_action = mt76x02_ampdu_action,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:140:\t.sta_rate_tbl_update = mt76x02_sta_rate_tbl_update,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:141:\t.set_rts_threshold = mt76x02_set_rts_threshold,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-142-\t.wake_tx_queue = mt76_wake_tx_queue,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-150-\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:151:static int mt76x0u_init_hardware(struct mt76x02_dev *dev, bool reset)\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-152-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-156-\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:157:\tif (!mt76x02_wait_for_mac(\u0026dev-\u003emt76))\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-158-\t\treturn -ETIMEDOUT;\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-178-\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:179:static int mt76x0u_register_device(struct mt76x02_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-180-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c=213=static int mt76x0u_probe(struct usb_interface *usb_intf,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-219-\t\t.survey_flags = SURVEY_INFO_TIME_TX,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:220:\t\t.update_survey = mt76x02_update_channel,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-221-\t\t.set_channel = mt76x0_set_channel,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-223-\t\t.tx_complete_skb = mt76x02u_tx_complete_skb,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:224:\t\t.tx_status_data = mt76x02_tx_status_data,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:225:\t\t.rx_skb = mt76x02_queue_rx_skb,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:226:\t\t.sta_ps = mt76x02_sta_ps,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:227:\t\t.sta_add = mt76x02_sta_add,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:228:\t\t.sta_remove = mt76x02_sta_remove,\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-229-\t};\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-230-\tstruct usb_device *usb_dev = interface_to_usbdev(usb_intf);\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:231:\tstruct mt76x02_dev *dev;\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-232-\tstruct mt76_dev *mdev;\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-240-\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:241:\tdev = container_of(mdev, struct mt76x02_dev, mt76);\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-242-\tmutex_init(\u0026dev-\u003ephy_mutex);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-259-\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:260:\tif (!mt76x02_wait_for_mac(mdev)) {\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-261-\t\tret = -ETIMEDOUT;\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c=292=static void mt76x0_disconnect(struct usb_interface *usb_intf)\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-293-{\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:294:\tstruct mt76x02_dev *dev = usb_get_intfdata(usb_intf);\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-295-\tbool initialized = test_bit(MT76_STATE_INITIALIZED, \u0026dev-\u003emphy.state);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c=308=static int __maybe_unused mt76x0_suspend(struct usb_interface *usb_intf,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-310-{\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:311:\tstruct mt76x02_dev *dev = usb_get_intfdata(usb_intf);\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-312-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c=320=static int __maybe_unused mt76x0_resume(struct usb_interface *usb_intf)\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-321-{\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c:322:\tstruct mt76x02_dev *dev = usb_get_intfdata(usb_intf);\ndrivers/net/wireless/mediatek/mt76/mt76x0/usb.c-323-\tint ret;\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c-8-\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c:9:#include \"../mt76x02_usb.h\"\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c-10-#include \"mt76x2u.h\"\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c=32=static int mt76x2u_probe(struct usb_interface *intf,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c-38-\t\t.survey_flags = SURVEY_INFO_TIME_TX,\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c:39:\t\t.update_survey = mt76x02_update_channel,\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c-40-\t\t.set_channel = mt76x2u_set_channel,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c-42-\t\t.tx_complete_skb = mt76x02u_tx_complete_skb,\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c:43:\t\t.tx_status_data = mt76x02_tx_status_data,\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c:44:\t\t.rx_skb = mt76x02_queue_rx_skb,\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c:45:\t\t.sta_ps = mt76x02_sta_ps,\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c:46:\t\t.sta_add = mt76x02_sta_add,\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c:47:\t\t.sta_remove = mt76x02_sta_remove,\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c-48-\t};\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c-49-\tstruct usb_device *udev = interface_to_usbdev(intf);\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c:50:\tstruct mt76x02_dev *dev;\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c-51-\tstruct mt76_dev *mdev;\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c-58-\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c:59:\tdev = container_of(mdev, struct mt76x02_dev, mt76);\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c-60-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c=91=static void mt76x2u_disconnect(struct usb_interface *intf)\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c-92-{\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c:93:\tstruct mt76x02_dev *dev = usb_get_intfdata(intf);\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c-94-\tstruct ieee80211_hw *hw = mt76_hw(dev);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c=103=static int __maybe_unused mt76x2u_suspend(struct usb_interface *intf,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c-105-{\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c:106:\tstruct mt76x02_dev *dev = usb_get_intfdata(intf);\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c-107-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c=113=static int __maybe_unused mt76x2u_resume(struct usb_interface *intf)\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c-114-{\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c:115:\tstruct mt76x02_dev *dev = usb_get_intfdata(intf);\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb.c-116-\tint err;\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-9-#include \"eeprom.h\"\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:10:#include \"../mt76x02_phy.h\"\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:11:#include \"../mt76x02_usb.h\"\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-12-\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:13:static void mt76x2u_init_dma(struct mt76x02_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-14-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-27-\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:28:static void mt76x2u_power_on_rf_patch(struct mt76x02_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-29-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-47-\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:48:static void mt76x2u_power_on_rf(struct mt76x02_dev *dev, int unit)\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-49-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-69-\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:70:static void mt76x2u_power_on(struct mt76x02_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-71-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-105-\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:106:static int mt76x2u_init_eeprom(struct mt76x02_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-107-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-121-\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:122:\tmt76x02_eeprom_parse_hw_cap(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-123-\treturn 0;\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-125-\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:126:int mt76x2u_init_hardware(struct mt76x02_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-127-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-132-\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:133:\tif (!mt76x02_wait_for_mac(\u0026dev-\u003emt76))\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-134-\t\treturn -ETIMEDOUT;\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-145-\t/* wait for asic ready after fw load. */\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:146:\tif (!mt76x02_wait_for_mac(\u0026dev-\u003emt76))\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-147-\t\treturn -ETIMEDOUT;\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-158-\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:159:\tmt76x02_mac_setaddr(dev, dev-\u003emt76.eeprom.data + MT_EE_MAC_ADDR);\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-160-\tdev-\u003emt76.rxfilter = mt76_rr(dev, MT_RX_FILTR_CFG);\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-161-\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:162:\tif (!mt76x02_wait_for_txrx_idle(\u0026dev-\u003emt76))\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-163-\t\treturn -ETIMEDOUT;\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-166-\tfor (i = 0; i \u003c 256; i++)\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:167:\t\tmt76x02_mac_wcid_setup(dev, i, 0, NULL);\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-168-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-171-\t\tfor (k = 0; k \u003c 4; k++)\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:172:\t\t\tmt76x02_mac_shared_key_setup(dev, i, k, NULL);\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-173-\t}\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-183-\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:184:\tmt76x02_phy_set_rxpath(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:185:\tmt76x02_phy_set_txdac(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-186-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c-189-\ndrivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c:190:int mt76x2u_register_device(struct mt76x02_dev *dev)\n\n"
} |
| 41/2 | 2026/10/11 07:58 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 43271 output: 51 thoughts: 61 Thoughts: **USB Code Analysis: No Direct MT76x02_MMIO Dependency...Or Is There?** Okay, I'm going through this USB-related code and, initially, I'm not seeing any direct calls to functions within `mt76x02_mmio.c`. That's a bit surprising, but not unheard of; it might be layered differently, or rely on abstractions that don't directly expose those low-level MMIO interactions. But before I write this off completely, I'd better double-check the more specific `mt76x02_usb.c` file located in the same directory. It would be a silly oversight to miss if that specific USB driver does directly link that module. So, best practice will be to make sure to do a scan of that file before I assume I have a grasp on the entire calling structure. |
| 42/2 | 2026/10/11 07:58 | tool | grepper |
0mError:no matches Args: {
"Expression": "mt76x02_",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76/mt76x02_usb.c"
]
}Results: {
"error": "no matches"
} |
| 43/2 | 2026/10/11 07:58 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 43583 output: 30 thoughts: 98 Thoughts: **Investigating the mt76x02 USB Driver File Name** Okay, so I need to figure out the filename for the mt76x02 USB driver. My first instinct is to check the `Makefile`. Let's see... Aha! Okay, I see the line: `obj-$(CONFIG_MT76x02_USB) += mt76x02-usb.o`. That's pointing me in the right direction. And then, looking a little further, I see `mt76x02-usb-y := usb.o usb_mcu.o`. This tells me the object files involved are `usb.o` and `usb_mcu.o`, within `mt76x02-usb.o`. Now, I need to find the *source* file this is built from. The common convention suggests it might be in `drivers/net/wireless/mediatek/mt76/`. Time to check `usb.c` or something similar, within that directory, to confirm the implementation details. |
| 44/2 | 2026/10/11 07:58 | tool | codesearch-dir-index |
0mArgs:{
"Dir": "drivers/net/wireless/mediatek/mt76"
}Results: {
"Files": [
"agg-rx.c",
"channel.c",
"debugfs.c",
"dma.c",
"dma.h",
"eeprom.c",
"mac80211.c",
"mcu.c",
"mmio.c",
"mt76.h",
"mt76_connac.h",
"mt76_connac2_mac.h",
"mt76_connac3_mac.c",
"mt76_connac3_mac.h",
"mt76_connac_mac.c",
"mt76_connac_mcu.c",
"mt76_connac_mcu.h",
"mt76x02.h",
"mt76x02_beacon.c",
"mt76x02_debugfs.c",
"mt76x02_dfs.c",
"mt76x02_dfs.h",
"mt76x02_dma.h",
"mt76x02_eeprom.c",
"mt76x02_eeprom.h",
"mt76x02_mac.c",
"mt76x02_mac.h",
"mt76x02_mcu.c",
"mt76x02_mcu.h",
"mt76x02_mmio.c",
"mt76x02_phy.c",
"mt76x02_phy.h",
"mt76x02_regs.h",
"mt76x02_trace.c",
"mt76x02_trace.h",
"mt76x02_txrx.c",
"mt76x02_usb.h",
"mt76x02_usb_core.c",
"mt76x02_usb_mcu.c",
"mt76x02_util.c",
"mt792x.h",
"mt792x_acpi_sar.c",
"mt792x_acpi_sar.h",
"mt792x_core.c",
"mt792x_debugfs.c",
"mt792x_dma.c",
"mt792x_mac.c",
"mt792x_regs.h",
"mt792x_trace.c",
"mt792x_trace.h",
"mt792x_usb.c",
"npu.c",
"pci.c",
"scan.c",
"sdio.c",
"sdio.h",
"sdio_txrx.c",
"testmode.c",
"testmode.h",
"trace.c",
"trace.h",
"tx.c",
"usb.c",
"usb_trace.c",
"usb_trace.h",
"util.c",
"util.h",
"wed.c"
],
"Subdirs": [
"mt7603",
"mt7615",
"mt76x0",
"mt76x2",
"mt7915",
"mt7921",
"mt7925",
"mt7996"
]
} |
| 45/2 | 2026/10/11 07:58 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 44751 output: 42 thoughts: 68 Thoughts: Here's my thought process, as requested: **Digging into the MT76x02 USB Driver Architecture** Okay, so I need to understand the interaction between the USB core and the MMIO components within the MT76x02 driver. My immediate focus is on how USB-specific code might be relying on, or interfacing with, the memory-mapped I/O (MMIO) functions. Therefore, I should start by examining `drivers/net/wireless/mediatek/mt76/mt76x02_usb_core.c` and `mt76x02_usb_mcu.c`. I have to see if any of the USB-related functions in those files are making calls into `mt76x02_mmio.c`. If there's direct interaction, that would be important to understand. I need to trace the data flow or command sequences, to see if there are dependencies, or potential race conditions. Ultimately, the question is whether USB activity is indirectly, or directly, linked to MMIO operations. |
| 46/2 | 2026/10/11 07:58 | tool | grepper |
0mArgs:{
"Expression": "mt76x02_mmio",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/Makefile=31=mt76x02-lib-y := mt76x02_util.o mt76x02_mac.o mt76x02_mcu.o \\\ndrivers/net/wireless/mediatek/mt76/Makefile:32:\t\t mt76x02_eeprom.o mt76x02_phy.o mt76x02_mmio.o \\\ndrivers/net/wireless/mediatek/mt76/Makefile-33-\t\t mt76x02_txrx.o mt76x02_trace.o mt76x02_debugfs.o \\\n"
} |
| 47/2 | 2026/10/11 07:58 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 45268 output: 76 thoughts: 367 Thoughts: **Analyzing the Driver Architecture** Okay, let's circle back and meticulously examine those exported functions from `mt76x02_mmio.c` one more time. I'm seeing: `mt76x02e_init_beacon_config`, `mt76x02_dma_init`, `mt76x02_rx_poll_complete`, `mt76x02_irq_handler`, `mt76x02_dma_disable`, `mt76x02_mac_start`, `mt76x02_reconfig_complete`, and `mt76x02_wdt_work`. Hold on, none of these are being called by any of the USB-related files that I was focusing on earlier! Intriguing. Instead, all the call sites are within the `mt76x0/pci.c`, `mt76x2/pci.c`, `mt76x2/pci_init.c`, and `mt76x2/pci_main.c` files. This suggests a strong correlation with the PCI bus. Now, my intuition is telling me to dig a little deeper. What hardware configurations are these `mt76x0e` and `mt76x2e` functions actually intended for? My hypothesis is that they are connected to PCI. Let's confirm that by checking out `drivers/net/wireless/mediatek/mt76/mt76x0/pci.c`. Ah, there it is: `module_pci_driver(mt76x0e_driver);` and in `drivers/net/wireless/mediatek/mt76/mt76x2/pci.c` we see `module_pci_driver(mt76x2e_driver);` That's exactly what I suspected. This brings us to a crucial question: What are the specific device IDs associated with these PCI drivers? I need to verify which devices these drivers support by carefully inspecting `mt76x0/pci.c` and `mt76x2/pci.c`. The device IDs will be the key to understanding the full hardware compatibility picture. |
| 48/2 | 2026/10/11 07:59 | tool | grepper |
0mArgs:{
"Expression": "pci_device_id",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76/mt76x0/pci.c",
"drivers/net/wireless/mediatek/mt76/mt76x2/pci.c"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/mt76x0/pci.c=153=static int\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c:154:mt76x0e_probe(struct pci_dev *pdev, const struct pci_device_id *id)\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-155-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c=272=static int mt76x0e_resume(struct pci_dev *pdev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-302-\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c:303:static const struct pci_device_id mt76x0e_device_table[] = {\ndrivers/net/wireless/mediatek/mt76/mt76x0/pci.c-304-\t{ PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x7610) },\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci.c-11-\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci.c:12:static const struct pci_device_id mt76x2e_device_table[] = {\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci.c-13-\t{ PCI_DEVICE(PCI_VENDOR_ID_MEDIATEK, 0x7662) },\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci.c=19=static int\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci.c:20:mt76x2e_probe(struct pci_dev *pdev, const struct pci_device_id *id)\ndrivers/net/wireless/mediatek/mt76/mt76x2/pci.c-21-{\n"
} |
| 49/2 | 2026/10/11 07:59 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 46766 output: 39 thoughts: 1554 Thoughts: **Analyzing MediaTek WLAN Card Reachability for Fuzzing** Okay, so I'm looking at these MediaTek PCIe WLAN cards, specifically the ones identified by vendor ID `0x14c3` and the device IDs like `0x7610`, `0x7630`, and so on. My initial question is whether QEMU emulates these. I know from experience that QEMU doesn't emulate these specific MediaTek PCIe Wi-Fi devices. Given my knowledge of how fuzzing works within standard virtualized environments, reachability is the primary concern. If the code I want to fuzz is not executed in standard environments using software-emulated devices, it's a dead end. Vendor-specific PCIe hardware is typically unreachable in the emulated environment. My next line of thinking is about `mt76`, the MediaTek driver. Could `mt76` components, specifically those related to this hardware, be somehow leveraged through `mac80211_hwsim` or, perhaps, a USB interface? I know `mac80211_hwsim` simulates the mac80211 layer directly and doesn't utilize vendor hardware drivers such as `mt76` directly. Let me double-check whether USB uses `mt76x02_mmio.c` at all. This might offer a path. If not through USB, is there any USB code that uses either `mt76x02_key_sync` or any other function within `mt76x02_mmio.c`? I need to confirm if there's any USB code that utilizes `mt76x02_key_sync` or `mt76x02_reset_state`, which are both defined within `mt76x02_mmio.c`. It's very important. I've got to determine where `mt76x02_key_sync` is defined. Aha, it's defined as `static` inside `drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c`. Because it's static, it's not exported, and its address isn't taken outside `mt76x02_mmio.c`. Similarly, `mt76x02_reset_state` is static and called *only* by `mt76x02_watchdog_reset`. This too is static within `mt76x02_mmio.c`. Further, `mt76x02_watchdog_reset` is called only by `mt76x02_check_tx_hang` which, guess what, is also static. And `mt76x02_check_tx_hang` is called from `mt76x02_wdt_work` which is defined in `mt76x02_mmio.c`. `mt76x02_wdt_work` is static as well. The function `mt76x02_wdt_work` is *only* used within `mt76x02_util.c` for USB and PCI devices, and `pci_main.c` and `pci_init.c` for PCI devices. So, this narrows down the potential reachability, if any. I must investigate how `mt76x02_wdt_work` is invoked in both the USB and PCI contexts. Does this reveal a path that could make this code reachable in a virtualized environment? Let me investigate the possibility of SoCs using MT7603 or MT7628, for example, OpenWrt-based MIPS or ARM SoCs. The question becomes, do these use `mt76x02_mmio.c`? I must check the Kconfig files for these drivers. Specifically, I'll check if the MT7603 driver `selects MT76x02_LIB`. |
| 50/2 | 2026/10/11 07:59 | tool | grepper |
0mArgs:{
"Expression": "MT76x02",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/Kconfig=16=config MT76_SDIO\n--\ndrivers/net/wireless/mediatek/mt76/Kconfig-19-\ndrivers/net/wireless/mediatek/mt76/Kconfig:20:config MT76x02_LIB\ndrivers/net/wireless/mediatek/mt76/Kconfig-21-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/Kconfig-23-\ndrivers/net/wireless/mediatek/mt76/Kconfig:24:config MT76x02_USB\ndrivers/net/wireless/mediatek/mt76/Kconfig-25-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/Makefile=4=obj-$(CONFIG_MT76_SDIO) += mt76-sdio.o\ndrivers/net/wireless/mediatek/mt76/Makefile:5:obj-$(CONFIG_MT76x02_LIB) += mt76x02-lib.o\ndrivers/net/wireless/mediatek/mt76/Makefile:6:obj-$(CONFIG_MT76x02_USB) += mt76x02-usb.o\ndrivers/net/wireless/mediatek/mt76/Makefile-7-obj-$(CONFIG_MT76_CONNAC_LIB) += mt76-connac-lib.o\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig=2=config MT76x0_COMMON\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig-3-\ttristate\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig:4:\tselect MT76x02_LIB\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig-5-\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig=6=config MT76x0U\n--\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig-8-\tselect MT76x0_COMMON\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig:9:\tselect MT76x02_USB\ndrivers/net/wireless/mediatek/mt76/mt76x0/Kconfig-10-\tdepends on MAC80211\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-6-\ndrivers/net/wireless/mediatek/mt76/mt76x02.h:7:#ifndef __MT76x02_H\ndrivers/net/wireless/mediatek/mt76/mt76x02.h:8:#define __MT76x02_H\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-9-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-17-\ndrivers/net/wireless/mediatek/mt76/mt76x02.h:18:#define MT76x02_TX_RING_SIZE\t512\ndrivers/net/wireless/mediatek/mt76/mt76x02.h:19:#define MT76x02_PSD_RING_SIZE\t128\ndrivers/net/wireless/mediatek/mt76/mt76x02.h:20:#define MT76x02_N_WCIDS 128\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-21-#define MT_CALIBRATE_INTERVAL\tHZ\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02.h=273=mt76x02_rx_get_sta_wcid(struct mt76x02_sta *sta, bool unicast)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02.h-283-\ndrivers/net/wireless/mediatek/mt76/mt76x02.h:284:#endif /* __MT76x02_H */\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_dfs.h-5-\ndrivers/net/wireless/mediatek/mt76/mt76x02_dfs.h:6:#ifndef __MT76x02_DFS_H\ndrivers/net/wireless/mediatek/mt76/mt76x02_dfs.h:7:#define __MT76x02_DFS_H\ndrivers/net/wireless/mediatek/mt76/mt76x02_dfs.h-8-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_dfs.h=131=void mt76x02_phy_dfs_adjust_agc(struct mt76x02_dev *dev);\ndrivers/net/wireless/mediatek/mt76/mt76x02_dfs.h:132:#endif /* __MT76x02_DFS_H */\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_dma.h-5-\ndrivers/net/wireless/mediatek/mt76/mt76x02_dma.h:6:#ifndef __MT76x02_DMA_H\ndrivers/net/wireless/mediatek/mt76/mt76x02_dma.h:7:#define __MT76x02_DMA_H\ndrivers/net/wireless/mediatek/mt76/mt76x02_dma.h-8-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_dma.h=63=void mt76x02_dma_disable(struct mt76x02_dev *dev);\ndrivers/net/wireless/mediatek/mt76/mt76x02_dma.h-64-\ndrivers/net/wireless/mediatek/mt76/mt76x02_dma.h:65:#endif /* __MT76x02_DMA_H */\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h-6-\ndrivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h:7:#ifndef __MT76x02_EEPROM_H\ndrivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h:8:#define __MT76x02_EEPROM_H\ndrivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h-9-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h=181=int mt76x02_eeprom_copy(struct mt76x02_dev *dev,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h-184-\ndrivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h:185:#endif /* __MT76x02_EEPROM_H */\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mcu.h-5-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mcu.h:6:#ifndef __MT76x02_MCU_H\ndrivers/net/wireless/mediatek/mt76/mt76x02_mcu.h:7:#define __MT76x02_MCU_H\ndrivers/net/wireless/mediatek/mt76/mt76x02_mcu.h-8-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mcu.h=97=void mt76x02_set_ethtool_fwver(struct mt76x02_dev *dev,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mcu.h-99-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mcu.h:100:#endif /* __MT76x02_MCU_H */\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=175=int mt76x02_dma_init(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-199-\t\tret = mt76_init_tx_queue(\u0026dev-\u003emphy, i, mt76_ac_to_hwq(i),\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:200:\t\t\t\t\t MT76x02_TX_RING_SIZE,\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-201-\t\t\t\t\t MT_TX_RING_BASE, NULL, 0);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-206-\tret = mt76_init_tx_queue(\u0026dev-\u003emphy, MT_TXQ_PSD, MT_TX_HW_QUEUE_MGMT,\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:207:\t\t\t\t MT76x02_PSD_RING_SIZE, MT_TX_RING_BASE,\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-208-\t\t\t\t NULL, 0);\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=394=static void mt76x02_reset_state(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-405-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:406:\tfor (i = 0; i \u003c MT76x02_N_WCIDS; i++) {\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-407-\t\tstruct ieee80211_sta *sta;\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_phy.h-5-\ndrivers/net/wireless/mediatek/mt76/mt76x02_phy.h:6:#ifndef __MT76x02_PHY_H\ndrivers/net/wireless/mediatek/mt76/mt76x02_phy.h:7:#define __MT76x02_PHY_H\ndrivers/net/wireless/mediatek/mt76/mt76x02_phy.h-8-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_phy.h=47=void mt76x02_init_agc_gain(struct mt76x02_dev *dev);\ndrivers/net/wireless/mediatek/mt76/mt76x02_phy.h-48-\ndrivers/net/wireless/mediatek/mt76/mt76x02_phy.h:49:#endif /* __MT76x02_PHY_H */\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_trace.h-5-\ndrivers/net/wireless/mediatek/mt76/mt76x02_trace.h:6:#if !defined(__MT76x02_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)\ndrivers/net/wireless/mediatek/mt76/mt76x02_trace.h:7:#define __MT76x02_TRACE_H\ndrivers/net/wireless/mediatek/mt76/mt76x02_trace.h-8-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_usb.h-5-\ndrivers/net/wireless/mediatek/mt76/mt76x02_usb.h:6:#ifndef __MT76x02_USB_H\ndrivers/net/wireless/mediatek/mt76/mt76x02_usb.h:7:#define __MT76x02_USB_H\ndrivers/net/wireless/mediatek/mt76/mt76x02_usb.h-8-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_usb.h=24=void mt76x02u_exit_beacon_config(struct mt76x02_dev *dev);\ndrivers/net/wireless/mediatek/mt76/mt76x02_usb.h:25:#endif /* __MT76x02_USB_H */\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_usb_mcu.c=295=MODULE_AUTHOR(\"Lorenzo Bianconi \u003clorenzo.bianconi83@gmail.com\u003e\");\ndrivers/net/wireless/mediatek/mt76/mt76x02_usb_mcu.c:296:MODULE_DESCRIPTION(\"MediaTek MT76x02 MCU helpers\");\ndrivers/net/wireless/mediatek/mt76/mt76x02_usb_mcu.c-297-MODULE_LICENSE(\"Dual BSD/GPL\");\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c-9-\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c:10:#define MT76x02_CCK_RATE(_idx, _rate) {\t\t\t\t\t\\\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c-11-\t.bitrate = _rate,\t\t\t\t\t\\\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c=17=struct ieee80211_rate mt76x02_rates[] = {\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c:18:\tMT76x02_CCK_RATE(0, 10),\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c:19:\tMT76x02_CCK_RATE(1, 20),\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c:20:\tMT76x02_CCK_RATE(2, 55),\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c:21:\tMT76x02_CCK_RATE(3, 110),\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c-22-\tOFDM_RATE(0, 60),\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c=238=int mt76x02_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c-247-\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c:248:\tidx = mt76_wcid_alloc(dev-\u003emt76.wcid_mask, MT76x02_N_WCIDS);\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c-249-\tif (idx \u003c 0)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c=696=EXPORT_SYMBOL_GPL(mt76x02_config_mac_addr_list);\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c-697-\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c:698:MODULE_DESCRIPTION(\"MediaTek MT76x02 helpers\");\ndrivers/net/wireless/mediatek/mt76/mt76x02_util.c-699-MODULE_LICENSE(\"Dual BSD/GPL\");\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig=2=config MT76x2_COMMON\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig-3-\ttristate\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig:4:\tselect MT76x02_LIB\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig-5-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig=18=config MT76x2U\n--\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig-20-\tselect MT76x2_COMMON\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig:21:\tselect MT76x02_USB\ndrivers/net/wireless/mediatek/mt76/mt76x2/Kconfig-22-\tdepends on MAC80211\n"
} |
| 51/2 | 2026/10/11 07:59 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 53711 output: 43 thoughts: 972 Thoughts: **Analyzing the Reachability of `mt76x02_key_sync`** Okay, so I'm digging into this `MT76x02_LIB` module. It's only selected by `MT76x0_COMMON` and `MT76x2_COMMON`, which narrows the scope somewhat. And `mt76x02_mmio.c` is where the MMIO/PCIe-specific stuff for `mt76x02-lib` lives. Specifically, I'm trying to figure out if `mt76x02_key_sync` can ever be reached through a USB interface. From the code, I see that `mt76x02_key_sync` is only called by `mt76x02_reset_state`. Further up the call chain, `mt76x02_reset_state` is only called by `mt76x02_watchdog_reset`, which is only called by `mt76x02_check_tx_hang`, which is, in turn, only called by `mt76x02_wdt_work`. And, crucially, `mt76x02_wdt_work` is only set if the device isn't USB (`!mt76_is_usb(&dev->mt76)`). The only non-USB devices using `MT76x02_LIB` appear to be `MT76x0E` and `MT76x2E`. Those are PCIe devices (indicated by `pci_driver`). Now, my thoughts turn to emulation: can I reach this via emulation? I know QEMU doesn't emulate these MediaTek chips, so that's a dead end. But, could syzkaller's USB gadget emulation come into play? Wait... yes! Syzkaller *can* emulate USB devices via Raw Gadget, and USB fuzzing creates USB devices using `syz_usb_connect`. The question becomes: can I somehow reach `mt76x02_key_sync` *through* a USB interface in this setup? I need to meticulously examine the call paths. So, let's look at `mt76x02_key_sync` itself. Line 403 of `mt76x02_mmio.c` is the key. It's: `ieee80211_iter_keys_rcu(dev->mt76.hw, NULL, mt76x02_key_sync, NULL);`. The function is passed as a function pointer to `ieee80211_iter_keys_rcu`, so I need to check where `mt76x02_key_sync` is actually called. Is it used anywhere else in the kernel? I run a `git grep`. The output confirms my suspicions. `mt76x02_key_sync` is only used *once*, in that `ieee80211_iter_keys_rcu` call within `mt76x02_mmio.c`. It's static. It's completely confined to that one file. Now I'll check where `mt76x02_reset_state` is used. |
| 52/2 | 2026/10/11 08:00 | tool | grepper |
0mArgs:{
"Expression": "mt76x02_reset_state",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=375=static void mt76x02_key_sync(struct ieee80211_hw *hw, struct ieee80211_vif *vif,\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-393-\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:394:static void mt76x02_reset_state(struct mt76x02_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-395-{\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=434=static void mt76x02_watchdog_reset(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-454-\tif (restart)\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:455:\t\tmt76x02_reset_state(dev);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-456-\n"
} |
| 53/2 | 2026/10/11 08:00 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 55817 output: 36 thoughts: 2382 Thoughts: **Unreachable Code Analysis** Okay, let's break this down systematically. My initial goal is to determine if the code modified by the patch is reachable within a standard fuzzing environment. I'm starting with `mt76x02_key_sync`, as that's where the patch's changes reside. I'll trace its call path. First, `mt76x02_key_sync` is static and defined in `mt76x02_mmio.c`. I'll locate its callers. It is only called from within `mt76x02_reset_state`. Okay, `mt76x02_reset_state` is also static, also in `mt76x02_mmio.c`, and is only called within `mt76x02_watchdog_reset`. `mt76x02_watchdog_reset` is also static, in the same file, and only called by `mt76x02_check_tx_hang`. `mt76x02_check_tx_hang` is again static, in `mt76x02_mmio.c`, and only called from `mt76x02_wdt_work`. Now, the crucial step: where is `mt76x02_wdt_work` referenced? A global search reveals it's in a few headers and `mt76x02_mmio.c`, but most importantly, it's used in `mt76x02_util.c`. However, in `mt76x02_util.c`, `mt76x02_wdt_work` is initialized and scheduled only for non-USB devices! If `mt76_is_usb(&dev->mt76)` is true, the `wdt_work` is NOT initialized or scheduled with `mt76x02_wdt_work`. Let's confirm this by searching for `wdt_work` usage in the mt76 directory. The search results confirm this: the watchdog work is not used by the USB driver. USB does not initialize nor use the `wdt_work` and never calls this function. This is a critical observation. The code path that leads to `mt76x02_key_sync` seems to be *exclusively* for PCI or PCIe MediaTek devices and NOT USB devices. Furthermore, the drivers I'm looking at are PCIe devices (`MT76x0E` and `MT76x2E`). The obvious question is: are these MediaTek PCIe devices emulated in QEMU, the standard fuzzing environment? Nope. QEMU does not emulate MediaTek PCIe Wi-Fi adapters. It emulates basic NICs and standard PCIe controllers, but not this specific hardware. Now, let's look at the fuzzing guidelines. Section 1 explicitly highlights "Reachability is the primary gate": If the code isn't reachable in standard environments, it's out. Section 2's negative criteria are even clearer: Hardware that *requires* physical cards not emulated in QEMU is a definite no-go. Specifically, Vendor-specific PCIe devices are structurally unreachable. The driver teardown scenarios are also not relevant here. In this case, the modified code, including `mt76x02_key_sync`, falls into the category of "structurally unreachable hardware" because the targeted drivers (MT76x0E and MT76x2E) are PCIe devices and require physical hardware not emulated in QEMU. Syzkaller only instantiates USB devices; there is no PCIe wireless card equivalent. The `mt76x02_key_sync` function is strictly in the watchdog reset path specific to PCIe drivers, and the watchdog is never invoked for USB drivers. Therefore, it is impossible for the patched code to be reached. So, the conclusion is straightforward: the patch is not worth fuzzing, as the modified code is unreachable. |
| 54/2 | 2026/10/11 08:00 | tool | grepper |
0mArgs:{
"Expression": "iter_keys",
"PathPrefixes": [
"drivers/net/wireless/mediatek/mt76"
]
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c=2459=int mt76_connac_mcu_update_gtk_rekey(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c-2486-\ndrivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c:2487:\tieee80211_iter_keys(hw, vif, mt76_connac_mcu_key_iter, gtk_tlv);\ndrivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c-2488-\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c=394=static void mt76x02_reset_state(struct mt76x02_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-402-\trcu_read_lock();\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c:403:\tieee80211_iter_keys_rcu(dev-\u003emt76.hw, NULL, mt76x02_key_sync, NULL);\ndrivers/net/wireless/mediatek/mt76/mt76x02_mmio.c-404-\trcu_read_unlock();\n--\ndrivers/net/wireless/mediatek/mt76/mt7996/main.c=303=int mt7996_vif_link_add(struct mt76_phy *mphy, struct ieee80211_vif *vif,\n--\ndrivers/net/wireless/mediatek/mt76/mt7996/main.c-394-\tif (!mlink-\u003ewcid-\u003eoffchannel)\ndrivers/net/wireless/mediatek/mt76/mt7996/main.c:395:\t\tieee80211_iter_keys(mphy-\u003ehw, vif, mt7996_key_iter, \u0026it);\ndrivers/net/wireless/mediatek/mt76/mt7996/main.c-396-\n--\ndrivers/net/wireless/mediatek/mt76/mt7996/main.c=1604=mt7996_mac_sta_links_set_keys(struct mt7996_dev *dev,\n--\ndrivers/net/wireless/mediatek/mt76/mt7996/main.c-1616-\ndrivers/net/wireless/mediatek/mt76/mt7996/main.c:1617:\t\tieee80211_iter_keys(mt76_hw(dev), vif, mt7996_key_iter, \u0026it);\ndrivers/net/wireless/mediatek/mt76/mt7996/main.c-1618-\t}\n"
} |
| 55/2 | 2026/10/11 08:00 | llm | patch-evaluator |
0mModel:gemini-3.8-flash Args: null Results: null Tokens: input: 59905 output: 203 thoughts: 344 Thoughts: **My Analysis of the `mt76x02_mmio.c` Code Modification** Okay, so I've dug into this `mt76x02` code. The key takeaway here is that `mt76x02_mmio.c` seems to be the *only* place where `ieee80211_iter_keys_rcu` is called within the entire `mt76x02` module, and `mt76x02_key_sync` is only referenced from *that* single location. Looking deeper, I see it's all about the watchdog reset process for MT76x02 devices that use PCIe interfaces. Let's break it down: 1. **The file:** The relevant file is definitively `drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c`. 2. **The function:** The modified function, `mt76x02_key_sync`, is a `static` function, and it's solely called within `mt76x02_reset_state()`. 3. **The context:** This entire section deals with the MMIO (memory-mapped I/O) part of the MediaTek MT76x0/MT76x2 driver, specifically for the PCIe variants (MT76x0E and MT76x2E). This function is *only* ever executed during a watchdog reset, which is triggered by the `mt76x02_wdt_work` worker function. And *that* worker is only registered for PCIe devices, not USB. 4. **The hardware dependency:** Here's the kicker: PCIe-based MT76 devices require actual physical hardware. It cannot be reliably emulated within standard virtualized environments like QEMU or Google Compute Engine (GCE), which we typically use for fuzzing. 5. **The conclusion:** Because this code is tied to a specific hardware configuration (PCIe MT76) that cannot be reproduced in our standard fuzzing setups, the modified code is *structurally unreachable* for our purposes. Therefore, `WorthFuzzing` should be set to `false`. The `EnableConfigs` list should remain empty, and we don't need any `FocusSymbols` here. The reasoning is clear: the code is specific to PCIe hardware that is not emulatable in our target environments, rendering it unreachable. Time to call `set-results`. |
| 56/2 | 2026/10/11 08:00 | tool | set-results |
0mArgs:{
"EnableConfigs": [],
"FocusSymbols": [],
"Reasoning": "The patch modifies `mt76x02_key_sync()` in `drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c`. This static function is exclusively invoked by `mt76x02_reset_state()` during the watchdog reset path (`mt76x02_wdt_work()`) of MediaTek MT76x0/MT76x2 PCIe devices (mt76x0e, mt76x2e). It is not utilized by USB variants (which do not register `mt76x02_wdt_work`). Because these PCIe wireless devices require physical vendor hardware that is not emulated in standard virtualized fuzzing environments (QEMU/GCE), the modified code is structurally unreachable.",
"WorthFuzzing": false
}Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"Reasoning": "The patch modifies `mt76x02_key_sync()` in `drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c`. This static function is exclusively invoked by `mt76x02_reset_state()` during the watchdog reset path (`mt76x02_wdt_work()`) of MediaTek MT76x0/MT76x2 PCIe devices (mt76x0e, mt76x2e). It is not utilized by USB variants (which do not register `mt76x02_wdt_work`). Because these PCIe wireless devices require physical vendor hardware that is not emulated in standard virtualized fuzzing environments (QEMU/GCE), the modified code is structurally unreachable.",
"WorthFuzzing": false
} |
| 57/1 | 2026/10/11 08:00 | action | If |
0mArgs:{
"WorthFuzzing": false
}Results: null |
| Total Calls | Total Tokens | Avg Tokens | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|
| Total Calls | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|