| Seq | Timestamp | Type | Name | Duration |
|---|---|---|---|---|
| 0/0 | 2026/09/10 02:17 | flow | patch-triage |
1mArgs:null Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"KMSANReasoning": "",
"NeedsKMSAN": false,
"Reasoning": "The patch modifies ACPI SAR (Specific Absorption Rate) power limit handling in the MediaTek mt792x wireless driver (mt792x_acpi_sar.c). These code paths are only executed when proprietary MediaTek ACPI SAR methods (MTDS, MTGS) are evaluated from platform firmware on physical hardware with MediaTek Wi-Fi adapters. In standard virtualized fuzzing environments (QEMU/GCE), no such ACPI tables or hardware are present, making the modified functions structurally unreachable.",
"WorthFuzzing": false
} |
| 1/1 | 2026/09/10 02:17 | action | read-patch-diff |
0mArgs:null Results: {
"PatchDiff": "commit 68acf4911b98d5dd4b05e9cc1bdfe3d418b6514c\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Thu Sep 10 02:17:04 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/drivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c b/drivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c\nindex 946dd7956e4a0..9f0ea3d23e0f5 100644\n--- a/drivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c\n+++ b/drivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c\n@@ -279,10 +279,18 @@ mt792x_asar_get_geo_pwr(struct mt792x_phy *phy,\n \tif (idx \u003e= max)\n \t\treturn dyn_power;\n \n-\tgeo_power = (band_pwr + idx)-\u003epwr;\n-\tdyn_power += (band_pwr + idx)-\u003eoffset;\n+\tband_pwr += idx;\n \n-\treturn min(geo_power, dyn_power);\n+\t/* Some OEM tables carry 0xff here; narrowed to s8 that is -1 and\n+\t * wins the min() below. Take it as no limit.\n+\t */\n+\tif (band_pwr-\u003epwr == 0xff)\n+\t\treturn dyn_power;\n+\n+\tgeo_power = band_pwr-\u003epwr;\n+\n+\treturn min_t(int, geo_power,\n+\t\t min_t(int, dyn_power + band_pwr-\u003eoffset, 127));\n }\n \n static s8\n@@ -315,7 +323,9 @@ mt792x_asar_range_pwr(struct mt792x_phy *phy,\n \telse\n \t\tband = NL80211_BAND_2GHZ;\n \n-\treturn mt792x_asar_get_geo_pwr(phy, band, limit[idx]);\n+\t/* 0xff: no dynamic limit, see mt792x_asar_get_geo_pwr() */\n+\treturn mt792x_asar_get_geo_pwr(phy, band,\n+\t\t\t\t limit[idx] == 0xff ? 127 : limit[idx]);\n }\n \n int mt792x_init_acpi_sar_power(struct mt792x_phy *phy, bool set_default)\n"
} |
| 2/1 | 2026/09/10 02:17 | agent | patch-evaluator |
1mModel:core Args: null Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"Reasoning": "The patch modifies ACPI SAR (Specific Absorption Rate) power limit handling in the MediaTek mt792x wireless driver (mt792x_acpi_sar.c). These code paths are only executed when proprietary MediaTek ACPI SAR methods (MTDS, MTGS) are evaluated from platform firmware on physical hardware with MediaTek Wi-Fi adapters. In standard virtualized fuzzing environments (QEMU/GCE), no such ACPI tables or hardware are present, making the modified functions 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 68acf4911b98d5dd4b05e9cc1bdfe3d418b6514c
Author: syz-cluster <triage@syzkaller.com>
Date: Thu Sep 10 02:17:04 2026 +0000
syz-cluster: applied patch under review
diff --git a/drivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c b/drivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c
index 946dd7956e4a0..9f0ea3d23e0f5 100644
--- a/drivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c
+++ b/drivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c
@@ -279,10 +279,18 @@ mt792x_asar_get_geo_pwr(struct mt792x_phy *phy,
if (idx >= max)
return dyn_power;
- geo_power = (band_pwr + idx)->pwr;
- dyn_power += (band_pwr + idx)->offset;
+ band_pwr += idx;
- return min(geo_power, dyn_power);
+ /* Some OEM tables carry 0xff here; narrowed to s8 that is -1 and
+ * wins the min() below. Take it as no limit.
+ */
+ if (band_pwr->pwr == 0xff)
+ return dyn_power;
+
+ geo_power = band_pwr->pwr;
+
+ return min_t(int, geo_power,
+ min_t(int, dyn_power + band_pwr->offset, 127));
}
static s8
@@ -315,7 +323,9 @@ mt792x_asar_range_pwr(struct mt792x_phy *phy,
else
band = NL80211_BAND_2GHZ;
- return mt792x_asar_get_geo_pwr(phy, band, limit[idx]);
+ /* 0xff: no dynamic limit, see mt792x_asar_get_geo_pwr() */
+ return mt792x_asar_get_geo_pwr(phy, band,
+ limit[idx] == 0xff ? 127 : limit[idx]);
}
int mt792x_init_acpi_sar_power(struct mt792x_phy *phy, bool set_default)
|
| 3/2 | 2026/09/10 02:17 | llm | patch-evaluator |
0mModel:gemini-3.7-flash Args: null Results: null Tokens: input: 3269 output: 39 thoughts: 96 Thoughts: **Initial Assessment of the Code Patch** Okay, so the patch is located in `drivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c`. My immediate thought is, "Right, I need to understand the context of this code before I can assess its impact." My expert instinct is to dissect this piece by piece. First, I need to identify the exact driver in question. "MT792x" suggests MediaTek, so that's a good starting point. I need to figure out how this specific driver is utilized. Is it for a physical hardware interface like PCIe, USB, SDIO, or is it an integrated SoC solution? Does it have any implications for virtualization, like QEMU, or even cloud-native environments? This is critical for understanding where this patch might be relevant and if it could potentially introduce any compatibility issues in virtualized setups, which is always a concern. To achieve that, I will immediately leverage `grepper` and `read-file` to get a quick overview of its usage. With those two tools, I can start to build a picture of its role in the kernel and how it interacts with other modules and the wider system. |
| 4/2 | 2026/09/10 02:17 | tool | grepper |
0mArgs:{
"Expression": "mt792x_asar",
"PathPrefix": "drivers/net/wireless/mediatek/mt76"
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=92=static int\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:93:mt792x_asar_acpi_read_mtcl(struct mt792x_dev *dev, u8 **table, u8 *version)\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-94-{\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-100-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:101:\tif (len == sizeof(struct mt792x_asar_cl))\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:102:\t\t*version = ((struct mt792x_asar_cl *)*table)-\u003eversion;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:103:\telse if (len == sizeof(struct mt792x_asar_cl_v3))\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:104:\t\t*version = ((struct mt792x_asar_cl_v3 *)*table)-\u003eversion;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-105-\telse\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=112=static int\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:113:mt792x_asar_acpi_read_mtds(struct mt792x_dev *dev, u8 **table, u8 version)\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-114-{\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-124-\tcase 1:\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:125:\t\tenable = ((struct mt792x_asar_dyn *)*table)-\u003eenable;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:126:\t\tsarlen = sizeof(struct mt792x_asar_dyn_limit);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:127:\t\tprelen = sizeof(struct mt792x_asar_dyn);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-128-\t\tbreak;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-129-\tcase 2:\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:130:\t\tenable = ((struct mt792x_asar_dyn_v2 *)*table)-\u003eenable;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:131:\t\tsarlen = sizeof(struct mt792x_asar_dyn_limit_v2);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:132:\t\tprelen = sizeof(struct mt792x_asar_dyn_v2);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-133-\t\tbreak;\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=147=static int\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:148:mt792x_asar_acpi_read_mtgs(struct mt792x_dev *dev, u8 **table, u8 version)\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-149-{\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-158-\tcase 1:\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:159:\t\tsarlen = sizeof(struct mt792x_asar_geo_limit);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:160:\t\tprelen = sizeof(struct mt792x_asar_geo);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-161-\t\tbreak;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-162-\tcase 2:\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:163:\t\tsarlen = sizeof(struct mt792x_asar_geo_limit_v2);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:164:\t\tprelen = sizeof(struct mt792x_asar_geo_v2);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-165-\t\tbreak;\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=178=static int\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:179:mt792x_asar_acpi_read_mtfg(struct mt792x_dev *dev, u8 **table)\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-180-{\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=193=int mt792x_init_acpi_sar(struct mt792x_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-201-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:202:\tret = mt792x_asar_acpi_read_mtcl(dev, (u8 **)\u0026asar-\u003ecountrylist, \u0026asar-\u003ever);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-203-\tif (ret) {\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-207-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:208:\tret = mt792x_asar_acpi_read_mtds(dev, (u8 **)\u0026asar-\u003edyn, asar-\u003ever);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-209-\tif (ret) {\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-214-\t/* MTGS is optional */\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:215:\tret = mt792x_asar_acpi_read_mtgs(dev, (u8 **)\u0026asar-\u003egeo, asar-\u003ever);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-216-\tif (ret) {\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-221-\t/* MTFG is optional */\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:222:\tret = mt792x_asar_acpi_read_mtfg(dev, (u8 **)\u0026asar-\u003efg);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-223-\tif (ret) {\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=233=static s8\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:234:mt792x_asar_get_geo_pwr(struct mt792x_phy *phy,\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-235-\t\t\tenum nl80211_band band, s8 dyn_power)\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-237-\tstruct mt792x_acpi_sar *asar = phy-\u003eacpisar;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:238:\tstruct mt792x_asar_geo_band *band_pwr;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-239-\ts8 geo_power;\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=296=static s8\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:297:mt792x_asar_range_pwr(struct mt792x_phy *phy,\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-298-\t\t const struct cfg80211_sar_freq_ranges *range,\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-325-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:326:\t/* 0xff: no dynamic limit, see mt792x_asar_get_geo_pwr() */\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:327:\treturn mt792x_asar_get_geo_pwr(phy, band,\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-328-\t\t\t\t limit[idx] == 0xff ? 127 : limit[idx]);\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=331=int mt792x_init_acpi_sar_power(struct mt792x_phy *phy, bool set_default)\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-350-\t\tfrp-\u003epower = min_t(s8, set_default ? 127 : frp-\u003epower,\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:351:\t\t\t\t mt792x_asar_range_pwr(phy, frp-\u003erange, i));\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-352-\t}\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=358=u8 mt792x_acpi_get_flags(struct mt792x_phy *phy)\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-360-\tstruct mt792x_acpi_sar *acpisar = phy-\u003eacpisar;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:361:\tstruct mt792x_asar_fg *fg;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-362-\tstruct {\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=395=static u32\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:396:mt792x_acpi_get_mtcl_map_v3(int row, int column, struct mt792x_asar_cl_v3 *cl)\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-397-{\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=409=static u32\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:410:mt792x_acpi_get_mtcl_map(int row, int column, struct mt792x_asar_cl *cl)\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-411-{\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=427=mt792x_acpi_parse_mtcl_tbl_v3(struct mt792x_phy *phy, char *alpha2)\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-429-\tstruct mt792x_acpi_sar *sar = phy-\u003eacpisar;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:430:\tstruct mt792x_asar_cl_v3 *cl = sar-\u003ecountrylist_v3;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-431-\tint col, row, i;\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=456=mt792x_acpi_parse_mtcl_tbl(struct mt792x_phy *phy, char *alpha2)\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-458-\tstruct mt792x_acpi_sar *sar = phy-\u003eacpisar;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:459:\tstruct mt792x_asar_cl *cl = sar-\u003ecountrylist;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-460-\tint col, row, i;\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-19-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:20:struct mt792x_asar_dyn_limit {\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-21-\tu8 idx;\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-24-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:25:struct mt792x_asar_dyn {\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-26-\tu8 names[4];\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-28-\tu8 nr_tbl;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:29:\tDECLARE_FLEX_ARRAY(struct mt792x_asar_dyn_limit, tbl);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-30-} __packed;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-31-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:32:struct mt792x_asar_dyn_limit_v2 {\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-33-\tu8 idx;\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-36-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:37:struct mt792x_asar_dyn_v2 {\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-38-\tu8 names[4];\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-41-\tu8 nr_tbl;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:42:\tDECLARE_FLEX_ARRAY(struct mt792x_asar_dyn_limit_v2, tbl);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-43-} __packed;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-44-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:45:struct mt792x_asar_geo_band {\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-46-\tu8 pwr;\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-49-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:50:struct mt792x_asar_geo_limit {\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-51-\tu8 idx;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-52-\t/* 0:2G, 1:5G */\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:53:\tstruct mt792x_asar_geo_band band[2];\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-54-} __packed;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-55-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:56:struct mt792x_asar_geo {\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-57-\tu8 names[4];\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-59-\tu8 nr_tbl;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:60:\tDECLARE_FLEX_ARRAY(struct mt792x_asar_geo_limit, tbl);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-61-} __packed;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-62-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:63:struct mt792x_asar_geo_limit_v2 {\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-64-\tu8 idx;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-65-\t/* 0:2G, 1:5G, 2:6G */\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:66:\tstruct mt792x_asar_geo_band band[3];\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-67-} __packed;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-68-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:69:struct mt792x_asar_geo_v2 {\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-70-\tu8 names[4];\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-73-\tu8 nr_tbl;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:74:\tDECLARE_FLEX_ARRAY(struct mt792x_asar_geo_limit_v2, tbl);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-75-} __packed;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-76-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:77:struct mt792x_asar_cl_v3 {\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-78-\tu8 names[4];\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-87-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:88:struct mt792x_asar_cl {\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-89-\tu8 names[4];\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-96-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:97:struct mt792x_asar_fg {\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-98-\tu8 names[4];\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h=106=struct mt792x_acpi_sar {\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-108-\tunion {\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:109:\t\tstruct mt792x_asar_dyn *dyn;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:110:\t\tstruct mt792x_asar_dyn_v2 *dyn_v2;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-111-\t};\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-112-\tunion {\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:113:\t\tstruct mt792x_asar_geo *geo;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:114:\t\tstruct mt792x_asar_geo_v2 *geo_v2;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-115-\t};\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-116-\tunion {\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:117:\t\tstruct mt792x_asar_cl *countrylist;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:118:\t\tstruct mt792x_asar_cl_v3 *countrylist_v3;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-119-\t};\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h:120:\tstruct mt792x_asar_fg *fg;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.h-121-};\n"
} |
| 5/2 | 2026/09/10 02:17 | llm | patch-evaluator |
0mModel:gemini-3.7-flash Args: null Results: null Tokens: input: 10305 output: 44 thoughts: 65 Thoughts: **Analyzing the ACPI SAR Compilation and Usage** Okay, so I need to understand where the `mt792x_acpi_sar.c` file fits into the build process and how it's utilized. My first step is to delve into the `Makefile`. That'll tell me how this specific source file is compiled and linked. I need to identify any dependencies, any specific flags being used... the whole nine yards. Once I've got a handle on the build environment, I'll then move on to pinpointing the functions that are critical here: `mt792x_init_acpi_sar` and `mt792x_init_acpi_sar_power`. I'm going to track down every instance where either of these are called. This will paint a clear picture of how these SAR initialization functions are being integrated into the driver and, more importantly, when and why they're being executed. From there I can determine the overall flow and behavior. |
| 6/2 | 2026/09/10 02:17 | tool | grepper |
0mArgs:{
"Expression": "mt792x_init_acpi_sar",
"PathPrefix": "drivers/net/wireless/mediatek/mt76"
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/mt7921/init.c=170=int mt7921_register_device(struct mt792x_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt7921/init.c-220-\ndrivers/net/wireless/mediatek/mt76/mt7921/init.c:221:\tmt792x_init_acpi_sar(dev);\ndrivers/net/wireless/mediatek/mt76/mt7921/init.c-222-\n--\ndrivers/net/wireless/mediatek/mt76/mt7921/main.c=1286=int mt7921_set_tx_sar_pwr(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/mediatek/mt76/mt7921/main.c-1296-\t}\ndrivers/net/wireless/mediatek/mt76/mt7921/main.c:1297:\tmt792x_init_acpi_sar_power(mt792x_hw_phy(hw), !sar);\ndrivers/net/wireless/mediatek/mt76/mt7921/main.c-1298-\n--\ndrivers/net/wireless/mediatek/mt76/mt7925/init.c=243=int mt7925_register_device(struct mt792x_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt7925/init.c-291-\ndrivers/net/wireless/mediatek/mt76/mt7925/init.c:292:\tmt792x_init_acpi_sar(dev);\ndrivers/net/wireless/mediatek/mt76/mt7925/init.c-293-\n--\ndrivers/net/wireless/mediatek/mt76/mt7925/main.c=1879=int mt7925_set_tx_sar_pwr(struct ieee80211_hw *hw,\n--\ndrivers/net/wireless/mediatek/mt76/mt7925/main.c-1889-\t}\ndrivers/net/wireless/mediatek/mt76/mt7925/main.c:1890:\tmt792x_init_acpi_sar_power(mt792x_hw_phy(hw), !sar);\ndrivers/net/wireless/mediatek/mt76/mt7925/main.c-1891-\n--\ndrivers/net/wireless/mediatek/mt76/mt792x.h=630=int mt792xe_mcu_fw_pmctrl(struct mt792x_dev *dev);\n--\ndrivers/net/wireless/mediatek/mt76/mt792x.h-632-#ifdef CONFIG_ACPI\ndrivers/net/wireless/mediatek/mt76/mt792x.h:633:int mt792x_init_acpi_sar(struct mt792x_dev *dev);\ndrivers/net/wireless/mediatek/mt76/mt792x.h:634:int mt792x_init_acpi_sar_power(struct mt792x_phy *phy, bool set_default);\ndrivers/net/wireless/mediatek/mt76/mt792x.h-635-u8 mt792x_acpi_get_flags(struct mt792x_phy *phy);\ndrivers/net/wireless/mediatek/mt76/mt792x.h=636=u32 mt792x_acpi_get_mtcl_conf(struct mt792x_phy *phy, char *alpha2);\ndrivers/net/wireless/mediatek/mt76/mt792x.h-637-#else\ndrivers/net/wireless/mediatek/mt76/mt792x.h:638:static inline int mt792x_init_acpi_sar(struct mt792x_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt792x.h-639-{\n--\ndrivers/net/wireless/mediatek/mt76/mt792x.h-642-\ndrivers/net/wireless/mediatek/mt76/mt792x.h:643:static inline int mt792x_init_acpi_sar_power(struct mt792x_phy *phy,\ndrivers/net/wireless/mediatek/mt76/mt792x.h-644-\t\t\t\t\t bool set_default)\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=179=mt792x_asar_acpi_read_mtfg(struct mt792x_dev *dev, u8 **table)\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-192-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:193:int mt792x_init_acpi_sar(struct mt792x_dev *dev)\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-194-{\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-230-}\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:231:EXPORT_SYMBOL_GPL(mt792x_init_acpi_sar);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-232-\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=297=mt792x_asar_range_pwr(struct mt792x_phy *phy,\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-330-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:331:int mt792x_init_acpi_sar_power(struct mt792x_phy *phy, bool set_default)\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-332-{\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-355-}\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:356:EXPORT_SYMBOL_GPL(mt792x_init_acpi_sar_power);\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-357-\n"
} |
| 7/2 | 2026/09/10 02:17 | llm | patch-evaluator |
0mModel:gemini-3.7-flash Args: null Results: null Tokens: input: 12438 output: 36 thoughts: 71 Thoughts: **Investigating the `mt7921` and `mt7925` Chipsets** Okay, let's dive in. I need to refresh my memory on the devices that utilize the `mt7921` and `mt7925` chipsets. What's the landscape here? Are we primarily looking at embedded solutions, or are there USB versions making the rounds? And what about PCIe or SDIO implementations? Need to get a handle on the interface variations. Alright, time to crack open the kernel source and start digging. I'll zero in on the `drivers/net/wireless/mediatek/mt76/` directory. Specifically, I'll be looking into the `mt7921/` and `mt7925/` subdirectories to see what kind of architecture and device implementations we have here. This should give me a good baseline. |
| 8/2 | 2026/09/10 02:17 | tool | codesearch-dir-index |
0mArgs:{
"Dir": "drivers/net/wireless/mediatek/mt76/mt7921"
}Results: {
"Files": [
"debugfs.c",
"init.c",
"mac.c",
"main.c",
"mcu.c",
"mcu.h",
"mt7921.h",
"pci.c",
"pci_mac.c",
"pci_mcu.c",
"regd.c",
"regd.h",
"regs.h",
"sdio.c",
"sdio_mac.c",
"sdio_mcu.c",
"testmode.c",
"usb.c"
],
"Subdirs": null
} |
| 9/2 | 2026/09/10 02:17 | llm | patch-evaluator |
0mModel:gemini-3.7-flash Args: null Results: null Tokens: input: 12883 output: 52 thoughts: 99 Thoughts: **USB Device and ACPI SAR Investigations** Okay, so I've spotted `usb.c` – that's a good starting point. My initial thought is to dive into the specific implementations for the MT7921 and MT7925 chipsets; I'll check `mt7921/usb.c` and `mt7925/usb.c` next, seeing what they're doing on the USB front. But then, a red flag popped up: what about ACPI SAR? Can a USB device even *use* ACPI SAR? That's the question. I need to understand how ACPI SAR is probed and initialized in relation to these devices. Let's dig into `drivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c`. That should give me the lowdown on how the ACPI SAR functionality is handled in this Mediatek context. I'm hoping I can piece together the interrelationship between the USB device and ACPI SAR from that code. |
| 10/2 | 2026/09/10 02:17 | tool | read-file |
0mArgs:{
"File": "drivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c",
"FirstLine": 1,
"LineCount": 100
}Results: {
"Contents": " 1:\t// SPDX-License-Identifier: BSD-3-Clause-Clear\n 2:\t/* Copyright (C) 2023 MediaTek Inc. */\n 3:\t\n 4:\t#include \u003clinux/acpi.h\u003e\n 5:\t#include \"mt792x.h\"\n 6:\t\n 7:\tstatic const char * const cc_list_all[] = {\n 8:\t\t\"00\", \"EU\", \"AR\", \"AU\", \"AZ\", \"BY\", \"BO\", \"BR\",\n 9:\t\t\"CA\", \"CL\", \"CN\", \"ID\", \"JP\", \"MY\", \"MX\", \"ME\",\n 10:\t\t\"MA\", \"NZ\", \"NG\", \"PH\", \"RU\", \"RS\", \"SG\", \"KR\",\n 11:\t\t\"TW\", \"TH\", \"UA\", \"GB\", \"US\", \"VN\", \"KH\", \"PY\",\n 12:\t};\n 13:\t\n 14:\tstatic const char * const cc_list_eu[] = {\n 15:\t\t\"AD\", \"AT\", \"BE\", \"BG\", \"CY\", \"CZ\", \"HR\", \"DK\",\n 16:\t\t\"EE\", \"FI\", \"FR\", \"DE\", \"GR\", \"HU\", \"IS\", \"IE\",\n 17:\t\t\"IT\", \"LV\", \"LI\", \"LT\", \"LU\", \"MC\", \"MT\", \"NL\",\n 18:\t\t\"NO\", \"PL\", \"PT\", \"RO\", \"SK\", \"SI\", \"ES\", \"SE\",\n 19:\t\t\"CH\",\n 20:\t};\n 21:\t\n 22:\tstatic const char * const cc_list_be[] = {\n 23:\t\t\"AR\", \"BR\", \"BY\", \"CL\", \"IQ\", \"MX\", \"OM\", \"RU\",\n 24:\t\t\"RW\", \"VN\", \"KR\", \"UA\", \"\", \"\", \"\", \"\",\n 25:\t\t\"EU\", \"AT\", \"CN\", \"CA\", \"TW\", \"NZ\", \"PH\", \"UK\",\n 26:\t\t\"US\",\n 27:\t};\n 28:\t\n 29:\tstatic int\n 30:\tmt792x_acpi_read(struct mt792x_dev *dev, u8 *method, u8 **tbl, u32 *len)\n 31:\t{\n 32:\t\tstruct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };\n 33:\t\tstruct mt76_dev *mdev = \u0026dev-\u003emt76;\n 34:\t\tunion acpi_object *sar_root;\n 35:\t\tacpi_handle root, handle;\n 36:\t\tacpi_status status;\n 37:\t\tu32 i = 0;\n 38:\t\tint ret;\n 39:\t\n 40:\t\troot = ACPI_HANDLE(mdev-\u003edev);\n 41:\t\tif (!root)\n 42:\t\t\treturn -EOPNOTSUPP;\n 43:\t\n 44:\t\tstatus = acpi_get_handle(root, method, \u0026handle);\n 45:\t\tif (ACPI_FAILURE(status))\n 46:\t\t\treturn -EIO;\n 47:\t\n 48:\t\tstatus = acpi_evaluate_object(handle, NULL, NULL, \u0026buf);\n 49:\t\tif (ACPI_FAILURE(status))\n 50:\t\t\treturn -EIO;\n 51:\t\n 52:\t\tsar_root = buf.pointer;\n 53:\t\tif (sar_root-\u003etype != ACPI_TYPE_PACKAGE ||\n 54:\t\t sar_root-\u003epackage.count \u003c 4 ||\n 55:\t\t sar_root-\u003epackage.elements[0].type != ACPI_TYPE_INTEGER) {\n 56:\t\t\tdev_err(mdev-\u003edev, \"sar cnt = %d\\n\",\n 57:\t\t\t\tsar_root-\u003epackage.count);\n 58:\t\t\tret = -EINVAL;\n 59:\t\t\tgoto free;\n 60:\t\t}\n 61:\t\n 62:\t\tif (!*tbl) {\n 63:\t\t\t*tbl = devm_kzalloc(mdev-\u003edev, sar_root-\u003epackage.count,\n 64:\t\t\t\t\t GFP_KERNEL);\n 65:\t\t\tif (!*tbl) {\n 66:\t\t\t\tret = -ENOMEM;\n 67:\t\t\t\tgoto free;\n 68:\t\t\t}\n 69:\t\t}\n 70:\t\n 71:\t\tif (len)\n 72:\t\t\t*len = sar_root-\u003epackage.count;\n 73:\t\n 74:\t\tfor (i = 0; i \u003c sar_root-\u003epackage.count; i++) {\n 75:\t\t\tunion acpi_object *sar_unit = \u0026sar_root-\u003epackage.elements[i];\n 76:\t\n 77:\t\t\tif (sar_unit-\u003etype != ACPI_TYPE_INTEGER)\n 78:\t\t\t\tbreak;\n 79:\t\n 80:\t\t\t*(*tbl + i) = (u8)sar_unit-\u003einteger.value;\n 81:\t\t}\n 82:\t\n 83:\t\tret = i == sar_root-\u003epackage.count ? 0 : -EINVAL;\n 84:\tfree:\n 85:\t\tkfree(sar_root);\n 86:\t\n 87:\t\treturn ret;\n 88:\t}\n 89:\t\n 90:\t/* MTCL : Country List Table for 6G band */\n 91:\t/* MTCL : Country List Table for 6G band and 11BE */\n 92:\tstatic int\n 93:\tmt792x_asar_acpi_read_mtcl(struct mt792x_dev *dev, u8 **table, u8 *version)\n 94:\t{\n 95:\t\tint len, ret;\n 96:\t\n 97:\t\tret = mt792x_acpi_read(dev, MT792x_ACPI_MTCL, table, \u0026len);\n 98:\t\tif (ret)\n 99:\t\t\treturn ret;\n 100:\t\n"
} |
| 11/2 | 2026/09/10 02:17 | llm | patch-evaluator |
0mModel:gemini-3.7-flash Args: null Results: null Tokens: input: 14801 output: 53 thoughts: 184 Thoughts: **My Analysis of the mt792x ACPI Handling** Okay, let's break this down. I see that `ACPI_HANDLE(mdev->dev)` is being examined in the `mt792x_acpi_read` function. The code is pretty straightforward: if there's no ACPI node associated with the device (that `!root` check), it returns an `-EOPNOTSUPP` error. Naturally, this flags my attention – when *does* a device actually *have* one of these ACPI nodes? Specifically, I'm thinking about those MediaTek-specific ACPI methods: "MTCL," "MTDS," "MTGS," and "MTFG." Ah, right, this is almost certainly only going to be present when we're dealing with specific physical hardware configurations. Specifically, MediaTek Wi-Fi cards *in* laptops that have OEM ACPI DSDT tables that define those "MTCL/MTDS/MTGS/MTFG" methods. Standard stuff, really. Hold on a second, let me just double-check something. I should review how `mt792x_init_acpi_sar` is actually configured. Let me go over lines 180-250 of `mt792x_acpi_sar.c` just to be certain. I want to make sure I am accounting for any of the finer details of the implementation. |
| 12/2 | 2026/09/10 02:17 | tool | read-file |
0mArgs:{
"File": "drivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c",
"FirstLine": 180,
"LineCount": 80
}Results: {
"Contents": " 180:\t{\n 181:\t\tint len, ret;\n 182:\t\n 183:\t\tret = mt792x_acpi_read(dev, MT792x_ACPI_MTFG, table, \u0026len);\n 184:\t\tif (ret)\n 185:\t\t\treturn ret;\n 186:\t\n 187:\t\tif (len \u003c MT792x_ASAR_MIN_FG)\n 188:\t\t\treturn -EINVAL;\n 189:\t\n 190:\t\treturn 0;\n 191:\t}\n 192:\t\n 193:\tint mt792x_init_acpi_sar(struct mt792x_dev *dev)\n 194:\t{\n 195:\t\tstruct mt792x_acpi_sar *asar;\n 196:\t\tint ret;\n 197:\t\n 198:\t\tasar = devm_kzalloc(dev-\u003emt76.dev, sizeof(*asar), GFP_KERNEL);\n 199:\t\tif (!asar)\n 200:\t\t\treturn -ENOMEM;\n 201:\t\n 202:\t\tret = mt792x_asar_acpi_read_mtcl(dev, (u8 **)\u0026asar-\u003ecountrylist, \u0026asar-\u003ever);\n 203:\t\tif (ret) {\n 204:\t\t\tdevm_kfree(dev-\u003emt76.dev, asar-\u003ecountrylist);\n 205:\t\t\tasar-\u003ecountrylist = NULL;\n 206:\t\t}\n 207:\t\n 208:\t\tret = mt792x_asar_acpi_read_mtds(dev, (u8 **)\u0026asar-\u003edyn, asar-\u003ever);\n 209:\t\tif (ret) {\n 210:\t\t\tdevm_kfree(dev-\u003emt76.dev, asar-\u003edyn);\n 211:\t\t\tasar-\u003edyn = NULL;\n 212:\t\t}\n 213:\t\n 214:\t\t/* MTGS is optional */\n 215:\t\tret = mt792x_asar_acpi_read_mtgs(dev, (u8 **)\u0026asar-\u003egeo, asar-\u003ever);\n 216:\t\tif (ret) {\n 217:\t\t\tdevm_kfree(dev-\u003emt76.dev, asar-\u003egeo);\n 218:\t\t\tasar-\u003egeo = NULL;\n 219:\t\t}\n 220:\t\n 221:\t\t/* MTFG is optional */\n 222:\t\tret = mt792x_asar_acpi_read_mtfg(dev, (u8 **)\u0026asar-\u003efg);\n 223:\t\tif (ret) {\n 224:\t\t\tdevm_kfree(dev-\u003emt76.dev, asar-\u003efg);\n 225:\t\t\tasar-\u003efg = NULL;\n 226:\t\t}\n 227:\t\tdev-\u003ephy.acpisar = asar;\n 228:\t\n 229:\t\treturn 0;\n 230:\t}\n 231:\tEXPORT_SYMBOL_GPL(mt792x_init_acpi_sar);\n 232:\t\n 233:\tstatic s8\n 234:\tmt792x_asar_get_geo_pwr(struct mt792x_phy *phy,\n 235:\t\t\t\tenum nl80211_band band, s8 dyn_power)\n 236:\t{\n 237:\t\tstruct mt792x_acpi_sar *asar = phy-\u003eacpisar;\n 238:\t\tstruct mt792x_asar_geo_band *band_pwr;\n 239:\t\ts8 geo_power;\n 240:\t\tu8 idx, max;\n 241:\t\n 242:\t\tif (!asar-\u003egeo)\n 243:\t\t\treturn dyn_power;\n 244:\t\n 245:\t\tswitch (phy-\u003emt76-\u003edev-\u003eregion) {\n 246:\t\tcase NL80211_DFS_FCC:\n 247:\t\t\tidx = 0;\n 248:\t\t\tbreak;\n 249:\t\tcase NL80211_DFS_ETSI:\n 250:\t\t\tidx = 1;\n 251:\t\t\tbreak;\n 252:\t\tdefault: /* WW */\n 253:\t\t\tidx = 2;\n 254:\t\t\tbreak;\n 255:\t\t}\n 256:\t\n 257:\t\tif (asar-\u003ever == 1) {\n 258:\t\t\tband_pwr = \u0026asar-\u003egeo-\u003etbl[idx].band[0];\n 259:\t\t\tmax = ARRAY_SIZE(asar-\u003egeo-\u003etbl[idx].band);\n"
} |
| 13/2 | 2026/09/10 02:17 | llm | patch-evaluator |
0mModel:gemini-3.7-flash Args: null Results: null Tokens: input: 16592 output: 35 thoughts: 148 Thoughts: **Analyzing the mt792x_asar_get_geo_pwr Function** Okay, let's break this down. My initial observation is that `mt792x_asar_get_geo_pwr` starts with a critical check: `if (!asar->geo) return dyn_power;`. So, if `asar->geo` isn't set, it immediately returns `dyn_power`. Makes sense – if we don't have geo-location data, we fall back to a dynamic power setting. But, the real question is how `asar->geo` gets populated. It appears `asar->geo` is only initialized if `mt792x_asar_acpi_read_mtgs` is successful. And *that* function is calling an ACPI method called "MTGS" on the ACPI handle associated with `mdev->dev`. Okay, so we're relying on ACPI to provide the geographical power data. That's a reasonable approach, assuming the ACPI tables are properly configured on the system. Now, I need to be *absolutely* sure of this logic. I need to be 100% sure that there aren't any other places where `asar->geo`, `asar->dyn`, or even just the `asar` structure itself, gets modified. Any other modification could affect the flow of this code. It could cause race conditions. It could cause the geo-location system to return incorrect values. Time to do a thorough search for any other usage of `acpisar` or `geo` within the `mt76` codebase. I'm going to look for any other places where these variables may be getting set or modified to verify this logic. A broad search would involve searching for all instances of "acpisar" and "geo" in `mt76`. |
| 14/2 | 2026/09/10 02:17 | tool | grepper |
0mArgs:{
"Expression": "acpisar",
"PathPrefix": "drivers/net/wireless/mediatek/mt76"
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/mt792x.h=204=struct mt792x_phy {\n--\ndrivers/net/wireless/mediatek/mt76/mt792x.h-228-#ifdef CONFIG_ACPI\ndrivers/net/wireless/mediatek/mt76/mt792x.h:229:\tvoid *acpisar;\ndrivers/net/wireless/mediatek/mt76/mt792x.h-230-#endif\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=193=int mt792x_init_acpi_sar(struct mt792x_dev *dev)\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-226-\t}\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:227:\tdev-\u003ephy.acpisar = asar;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-228-\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=234=mt792x_asar_get_geo_pwr(struct mt792x_phy *phy,\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-236-{\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:237:\tstruct mt792x_acpi_sar *asar = phy-\u003eacpisar;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-238-\tstruct mt792x_asar_geo_band *band_pwr;\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=297=mt792x_asar_range_pwr(struct mt792x_phy *phy,\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-301-\tconst struct cfg80211_sar_capa *capa = phy-\u003emt76-\u003ehw-\u003ewiphy-\u003esar_capa;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:302:\tstruct mt792x_acpi_sar *asar = phy-\u003eacpisar;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-303-\tu8 *limit, band, max;\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=331=int mt792x_init_acpi_sar_power(struct mt792x_phy *phy, bool set_default)\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-335-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:336:\tif (!phy-\u003eacpisar || !((struct mt792x_acpi_sar *)phy-\u003eacpisar)-\u003edyn)\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-337-\t\treturn 0;\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=358=u8 mt792x_acpi_get_flags(struct mt792x_phy *phy)\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-359-{\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:360:\tstruct mt792x_acpi_sar *acpisar = phy-\u003eacpisar;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-361-\tstruct mt792x_asar_fg *fg;\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-371-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:372:\tif (!acpisar)\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-373-\t\treturn 0;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-374-\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:375:\tfg = acpisar-\u003efg;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-376-\tif (!fg)\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=427=mt792x_acpi_parse_mtcl_tbl_v3(struct mt792x_phy *phy, char *alpha2)\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-428-{\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:429:\tstruct mt792x_acpi_sar *sar = phy-\u003eacpisar;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-430-\tstruct mt792x_asar_cl_v3 *cl = sar-\u003ecountrylist_v3;\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=456=mt792x_acpi_parse_mtcl_tbl(struct mt792x_phy *phy, char *alpha2)\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-457-{\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:458:\tstruct mt792x_acpi_sar *sar = phy-\u003eacpisar;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-459-\tstruct mt792x_asar_cl *cl = sar-\u003ecountrylist;\n--\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c=479=u32 mt792x_acpi_get_mtcl_conf(struct mt792x_phy *phy, char *alpha2)\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-480-{\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c:481:\tstruct mt792x_acpi_sar *sar = phy-\u003eacpisar;\ndrivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c-482-\tu32 config = 0;\n"
} |
| 15/2 | 2026/09/10 02:17 | llm | patch-evaluator |
0mModel:gemini-3.7-flash Args: null Results: null Tokens: input: 19079 output: 37 thoughts: 66 Thoughts: Here's my summary, as though I'm thinking it: **Digging into the Hardware Landscape** Alright, let's get down to brass tacks. I need to clarify the specifics of what the MT7921 and MT7925 chipsets actually support from a hardware standpoint. Beyond that, I need to understand if the mt76, mt7921, and mt7925 designations exclusively refer to physical hardware or if there's more to it than meets the eye. My next step involves diving into the Kconfig files for MT7921, MT7925, and MT76. This should give me a clearer picture of their capabilities and relationships within the configuration framework. |
| 16/2 | 2026/09/10 02:17 | tool | grepper |
0mArgs:{
"Expression": "config MT792",
"PathPrefix": "drivers/net/wireless/mediatek/mt76"
}Results: {
"Output": "drivers/net/wireless/mediatek/mt76/Kconfig=28=config MT76_CONNAC_LIB\n--\ndrivers/net/wireless/mediatek/mt76/Kconfig-31-\ndrivers/net/wireless/mediatek/mt76/Kconfig:32:config MT792x_LIB\ndrivers/net/wireless/mediatek/mt76/Kconfig-33-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/Kconfig-35-\ndrivers/net/wireless/mediatek/mt76/Kconfig:36:config MT792x_USB\ndrivers/net/wireless/mediatek/mt76/Kconfig-37-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/mt7921/Kconfig-1-# SPDX-License-Identifier: BSD-3-Clause-Clear\ndrivers/net/wireless/mediatek/mt76/mt7921/Kconfig:2:config MT7921_COMMON\ndrivers/net/wireless/mediatek/mt76/mt7921/Kconfig-3-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/mt7921/Kconfig-6-\ndrivers/net/wireless/mediatek/mt76/mt7921/Kconfig:7:config MT7921E\ndrivers/net/wireless/mediatek/mt76/mt7921/Kconfig-8-\ttristate \"MediaTek MT7921E (PCIe) support\"\n--\ndrivers/net/wireless/mediatek/mt76/mt7921/Kconfig-16-\ndrivers/net/wireless/mediatek/mt76/mt7921/Kconfig:17:config MT7921S\ndrivers/net/wireless/mediatek/mt76/mt7921/Kconfig-18-\ttristate \"MediaTek MT7921S (SDIO) support\"\n--\ndrivers/net/wireless/mediatek/mt76/mt7921/Kconfig-27-\ndrivers/net/wireless/mediatek/mt76/mt7921/Kconfig:28:config MT7921U\ndrivers/net/wireless/mediatek/mt76/mt7921/Kconfig-29-\ttristate \"MediaTek MT7921U (USB) support\"\n--\ndrivers/net/wireless/mediatek/mt76/mt7925/Kconfig-1-# SPDX-License-Identifier: BSD-3-Clause-Clear\ndrivers/net/wireless/mediatek/mt76/mt7925/Kconfig:2:config MT7925_COMMON\ndrivers/net/wireless/mediatek/mt76/mt7925/Kconfig-3-\ttristate\n--\ndrivers/net/wireless/mediatek/mt76/mt7925/Kconfig-6-\ndrivers/net/wireless/mediatek/mt76/mt7925/Kconfig:7:config MT7925E\ndrivers/net/wireless/mediatek/mt76/mt7925/Kconfig-8-\ttristate \"MediaTek MT7925E (PCIe) support\"\n--\ndrivers/net/wireless/mediatek/mt76/mt7925/Kconfig-18-\ndrivers/net/wireless/mediatek/mt76/mt7925/Kconfig:19:config MT7925U\ndrivers/net/wireless/mediatek/mt76/mt7925/Kconfig-20-\ttristate \"MediaTek MT7925U (USB) support\"\n"
} |
| 17/2 | 2026/09/10 02:17 | llm | patch-evaluator |
0mModel:gemini-3.7-flash Args: null Results: null Tokens: input: 20252 output: 50 thoughts: 97 Thoughts: **Investigating USB Driver SAR Compatibility** Okay, so I'm looking into the MT7921U and MT7925U drivers, knowing they're USB-based. My immediate question is whether USB devices can even *have* ACPI SAR considerations. It seems a bit unusual, but I need to make sure. I'll need to dig into the code to confirm one way or the other. My first step will be to examine the `mt7921u_probe` and `mt7925u_probe` functions, or perhaps `mt7921_register_device`, to see if there's anything related to SAR or power management within the USB driver's initialization routines. Since I'm working with the MT7921 specifically, I'll focus my initial examination on `drivers/net/wireless/mediatek/mt76/mt7921/usb.c`. That seems the most logical place to start looking for related code. From there, I'll see where to go next. |
| 18/2 | 2026/09/10 02:18 | tool | read-file |
0mArgs:{
"File": "drivers/net/wireless/mediatek/mt76/mt7921/usb.c",
"FirstLine": 250,
"LineCount": 80
}Results: {
"Contents": " 250:\t\treturn 0;\n 251:\t\n 252:\terror:\n 253:\t\tmt76u_queues_deinit(\u0026dev-\u003emt76);\n 254:\t\tmt792xu_reset_work_cleanup(dev);\n 255:\t\n 256:\t\tusb_set_intfdata(usb_intf, NULL);\n 257:\t\n 258:\t\tmt76_free_device(\u0026dev-\u003emt76);\n 259:\t\n 260:\t\treturn ret;\n 261:\t}\n 262:\t\n 263:\t#ifdef CONFIG_PM\n 264:\tstatic int mt7921u_suspend(struct usb_interface *intf, pm_message_t state)\n 265:\t{\n 266:\t\tstruct mt792x_dev *dev = usb_get_intfdata(intf);\n 267:\t\tstruct mt76_connac_pm *pm = \u0026dev-\u003epm;\n 268:\t\tint err;\n 269:\t\n 270:\t\tpm-\u003esuspended = true;\n 271:\t\tflush_work(\u0026dev-\u003ereset_work);\n 272:\t\n 273:\t\terr = mt76_connac_mcu_set_hif_suspend(\u0026dev-\u003emt76, true, true);\n 274:\t\tif (err)\n 275:\t\t\tgoto failed;\n 276:\t\n 277:\t\tmt76u_stop_rx(\u0026dev-\u003emt76);\n 278:\t\tmt76u_stop_tx(\u0026dev-\u003emt76);\n 279:\t\n 280:\t\treturn 0;\n 281:\t\n 282:\tfailed:\n 283:\t\tpm-\u003esuspended = false;\n 284:\t\n 285:\t\tif (err \u003c 0)\n 286:\t\t\tmt792x_reset(\u0026dev-\u003emt76);\n 287:\t\n 288:\t\treturn err;\n 289:\t}\n 290:\t\n 291:\tstatic int mt7921u_resume(struct usb_interface *intf)\n 292:\t{\n 293:\t\tstruct mt792x_dev *dev = usb_get_intfdata(intf);\n 294:\t\tstruct mt76_connac_pm *pm = \u0026dev-\u003epm;\n 295:\t\tbool reinit = true;\n 296:\t\tint err, i;\n 297:\t\n 298:\t\tfor (i = 0; i \u003c 10; i++) {\n 299:\t\t\tu32 val = mt76_rr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT);\n 300:\t\n 301:\t\t\tif (!(val \u0026 MT_WF_SW_SER_TRIGGER_SUSPEND)) {\n 302:\t\t\t\treinit = false;\n 303:\t\t\t\tbreak;\n 304:\t\t\t}\n 305:\t\t\tif (val \u0026 MT_WF_SW_SER_DONE_SUSPEND) {\n 306:\t\t\t\tmt76_wr(dev, MT_WF_SW_DEF_CR_USB_MCU_EVENT, 0);\n 307:\t\t\t\tbreak;\n 308:\t\t\t}\n 309:\t\n 310:\t\t\tmsleep(20);\n 311:\t\t}\n 312:\t\n 313:\t\tif (reinit || mt792x_dma_need_reinit(dev)) {\n 314:\t\t\terr = mt792xu_dma_init(dev, true);\n 315:\t\t\tif (err)\n 316:\t\t\t\tgoto failed;\n 317:\t\t}\n 318:\t\n 319:\t\terr = mt76u_resume_rx(\u0026dev-\u003emt76);\n 320:\t\tif (err \u003c 0)\n 321:\t\t\tgoto failed;\n 322:\t\n 323:\t\terr = mt76_connac_mcu_set_hif_suspend(\u0026dev-\u003emt76, false, true);\n 324:\tfailed:\n 325:\t\tpm-\u003esuspended = false;\n 326:\t\n 327:\t\tif (err \u003c 0)\n 328:\t\t\tmt792x_reset(\u0026dev-\u003emt76);\n 329:\t\n"
} |
| 19/2 | 2026/09/10 02:18 | llm | patch-evaluator |
0mModel:gemini-3.7-flash Args: null Results: null Tokens: input: 21789 output: 50 thoughts: 51 Thoughts: Here's my analysis of the provided snippet, framed as my internal thought process: **Diving into the MT7921U Driver Probe and Initialization** Okay, so we're starting with `mt7921u_probe`. That's the entry point, the first place the driver gets involved with the device. Naturally, the next call is to `mt7921u_init`, the main initialization function. To understand the control flow, I'll need to see how the system is setting up the chip. Let's quickly jump into the code. Lines 200 through 250 in `mt7921/usb.c` should give me a pretty good overview of what's happening during the initial setup. I'm expecting to see things like device resource allocation, potentially some basic hardware resets, and maybe the initial configuration of the USB endpoints. I'll be looking for register access patterns and memory allocations - those are always good indicators of the core functionality. I'll pay close attention to the error handling within those lines. That's a critical area for device probing, where things can go wrong if the device isn't properly connected or supported. |
| 20/2 | 2026/09/10 02:18 | tool | read-file |
0mArgs:{
"File": "drivers/net/wireless/mediatek/mt76/mt7921/usb.c",
"FirstLine": 200,
"LineCount": 50
}Results: {
"Contents": " 200:\t\t\treturn -ENOMEM;\n 201:\t\n 202:\t\tdev = container_of(mdev, struct mt792x_dev, mt76);\n 203:\t\tdev-\u003efw_features = features;\n 204:\t\tdev-\u003ehif_ops = \u0026hif_ops;\n 205:\t\tatomic_set(\u0026dev-\u003emt76.bus_hung, false);\n 206:\t\tmt792xu_reset_work_init(dev);\n 207:\t\n 208:\t\tusb_reset_device(udev);\n 209:\t\n 210:\t\tusb_set_intfdata(usb_intf, dev);\n 211:\t\n 212:\t\tret = __mt76u_init(mdev, usb_intf, \u0026bus_ops);\n 213:\t\tif (ret \u003c 0)\n 214:\t\t\tgoto error;\n 215:\t\n 216:\t\tmdev-\u003erev = (mt76_rr(dev, MT_HW_CHIPID) \u003c\u003c 16) |\n 217:\t\t\t (mt76_rr(dev, MT_HW_REV) \u0026 0xff);\n 218:\t\tdev_dbg(mdev-\u003edev, \"ASIC revision: %04x\\n\", mdev-\u003erev);\n 219:\t\n 220:\t\tif (mt76_get_field(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_N9_RDY)) {\n 221:\t\t\tret = mt792xu_wfsys_reset(dev);\n 222:\t\t\tif (ret)\n 223:\t\t\t\tgoto error;\n 224:\t\t}\n 225:\t\n 226:\t\tret = mt792xu_mcu_power_on(dev);\n 227:\t\tif (ret)\n 228:\t\t\tgoto error;\n 229:\t\n 230:\t\tret = mt76u_alloc_mcu_queue(\u0026dev-\u003emt76);\n 231:\t\tif (ret)\n 232:\t\t\tgoto error;\n 233:\t\n 234:\t\tret = mt76u_alloc_queues(\u0026dev-\u003emt76);\n 235:\t\tif (ret)\n 236:\t\t\tgoto error;\n 237:\t\n 238:\t\tret = mt792xu_dma_init(dev, false);\n 239:\t\tif (ret)\n 240:\t\t\tgoto error;\n 241:\t\n 242:\t\thw = mt76_hw(dev);\n 243:\t\t/* check hw sg support in order to enable AMSDU */\n 244:\t\thw-\u003emax_tx_fragments = mdev-\u003eusb.sg_en ? MT_HW_TXP_MAX_BUF_NUM : 1;\n 245:\t\n 246:\t\tret = mt7921_register_device(dev);\n 247:\t\tif (ret)\n 248:\t\t\tgoto error;\n 249:\t\n"
} |
| 21/2 | 2026/09/10 02:18 | llm | patch-evaluator |
0mModel:gemini-3.7-flash Args: null Results: null Tokens: input: 22955 output: 139 thoughts: 2645 Thoughts: **Analysis of the MT792x ACPI SAR Power Calculation Code for Fuzzing** Okay, let's break this down. The code in `mt792x_acpi_sar.c` is responsible for handling Specific Absorption Rate (SAR) power calculations for MediaTek MT792x Wi-Fi devices, specifically within the `mt76` wireless driver. The initial call is triggered by `mt7921_register_device` which calls `mt792x_init_acpi_sar`. This function calls several ACPI read functions, namely `mt792x_asar_acpi_read_mtcl`, `mt792x_asar_acpi_read_mtds`, `mt792x_asar_acpi_read_mtgs`, and `mt792x_asar_acpi_read_mtfg` which attempt to read proprietary MediaTek ACPI methods such as `MTCL`, `MTDS`, `MTGS`, and `MTFG` from the ACPI DSDT/SSDT tables. These functions all call `mt792x_acpi_read`, which attempts to retrieve an ACPI handle from the device. Now, here's the crucial point: I know that in standard QEMU or Google Compute Engine (GCE) environments, which are what we use for fuzzing, these MediaTek-specific ACPI methods simply *don't exist*. QEMU generates its own ACPI tables for emulated devices, and these tables contain standard ACPI objects, but not the MediaTek proprietary ones. Even if we were to emulate a USB or PCIe device, the ACPI tables containing `MTCL`, `MTDS`, and friends are defined on real-world MediaTek OEM hardware, such as on laptops from ASUS, Lenovo, or HP. Therefore, `mt792x_acpi_read` is always going to fail with `-EOPNOTSUPP` or `-EIO`. This then means that the corresponding `asar->dyn`, `asar->geo`, `asar->countrylist` and `asar->fg` will be NULL. The patch itself modifies `mt792x_asar_get_geo_pwr` and `mt792x_asar_range_pwr`. The critical factor is their calling context. Both these functions are only called by `mt792x_init_acpi_sar_power()`. But wait, `mt792x_init_acpi_sar_power` has an early return condition: `if (!phy->acpisar || !((struct mt792x_acpi_sar *)phy->acpisar)->dyn) return 0;`. This means if `dyn` is NULL, the function immediately returns without ever executing `mt792x_asar_get_geo_pwr` or `mt792x_asar_range_pwr`. Remember `dyn` is populated through `mt792x_asar_acpi_read_mtds` after successfully reading the MTDS table. Considering all this, even if we *could* somehow get a MediaTek MT7921/MT7925 PCIe/USB device probed in QEMU, which itself is highly improbable due to the hardware-specific register access and firmware loading requirements of `mt7921u_probe` or similar routines, we would still fail to execute the modified code path. QEMU does not emulate the MT792x wireless chipset, and QEMU's ACPI tables *never* include MediaTek's proprietary `MTDS`/`MTGS` SAR methods. Consequently, since the code modifications are unreachable in our virtualized fuzzing environments, there's no need to fuzz this. It is a dead end. No need to enable any specific configurations or focus on any symbols. The entire code path is structurally unreachable. |
| 22/2 | 2026/09/10 02:18 | tool | set-results |
0mArgs:{
"EnableConfigs": [],
"FocusSymbols": [],
"Reasoning": "The patch modifies ACPI SAR (Specific Absorption Rate) power limit handling in the MediaTek mt792x wireless driver (mt792x_acpi_sar.c). These code paths are only executed when proprietary MediaTek ACPI SAR methods (MTDS, MTGS) are evaluated from platform firmware on physical hardware with MediaTek Wi-Fi adapters. In standard virtualized fuzzing environments (QEMU/GCE), no such ACPI tables or hardware are present, making the modified functions structurally unreachable.",
"WorthFuzzing": false
}Results: {
"EnableConfigs": null,
"FocusSymbols": [],
"Reasoning": "The patch modifies ACPI SAR (Specific Absorption Rate) power limit handling in the MediaTek mt792x wireless driver (mt792x_acpi_sar.c). These code paths are only executed when proprietary MediaTek ACPI SAR methods (MTDS, MTGS) are evaluated from platform firmware on physical hardware with MediaTek Wi-Fi adapters. In standard virtualized fuzzing environments (QEMU/GCE), no such ACPI tables or hardware are present, making the modified functions structurally unreachable.",
"WorthFuzzing": false
} |
| 23/1 | 2026/09/10 02:18 | action | If |
0mArgs:{
"WorthFuzzing": false
}Results: null |
| Total Calls | Total Tokens | Avg Tokens | Total Duration (Seconds) | Avg Duration (Seconds) |
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| Total Calls | Total Duration (Seconds) | Avg Duration (Seconds) |
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