kernel/linux.git/drivers/net/wireless/mediatek, branch v7.2-rc1

wifi: mt76: Drop unneeded mt76_register_debugfs_fops() return checks

2026-06-09T10:34:02+00:00

mt76_register_debugfs_fops() returns the dentry from debugfs_create_dir(), which yields an error pointer on failure (notably ERR_PTR(-ENODEV) when CONFIG_DEBUG_FS=n), never NULL. Per commit ff9fb72bc077 ("debugfs: return error values, not NULL"), callers do not need to check the return value. Drop the dead !dir checks in mt7615/mt7915/mt7921/mt7925/mt7996 _init_debugfs(). Converting them to IS_ERR() instead would have exposed a probe abort on CONFIG_DEBUG_FS=n, since each *_init_debugfs() caller propagates the helper's return value. This patch supersedes an earlier proposal that converted the checks to IS_ERR(). Link: https://lore.kernel.org/all/20260514193243.2518979-1-ingyujang25@korea.ac.kr Signed-off-by: Ingyu Jang Link: https://patch.msgid.link/20260519085214.164846-1-ingyujang25@korea.ac.kr Signed-off-by: Felix Fietkau

wifi: mt76: mt7921: assert sniffer on chanctx change

2026-06-09T10:30:59+00:00

mt7921_change_chanctx() configures the channel for monitor vifs but does not re-assert sniffer mode. mt7925_change_chanctx() does. Match mt7925 by adding the missing mt7921_mcu_set_sniffer(true) call, completing the architectural pattern from commit 914189af23b8 ("wifi: mt76: mt7921: fix channel switch fail in monitor mode"). The user-visible regression this asymmetry produced on v6.17 and v6.18 was addressed by commit cdb2941a516c ("Revert "wifi: mt76: mt792x: improve monitor interface handling"") in v6.19 and backported to the 6.17.y and 6.18.y stable trees. This patch is defense in depth in case the NO_VIRTUAL_MONITOR change is reintroduced in a future series. Tested-by: Nick Morrow Tested-on: RasPi4B, RasPiOS 64 bit, Alfa AWUS036AXML mt7921u Tested-on: RasPi4B, RasPiOS 64 bit, Netgear A9000 mt7925u Signed-off-by: Devin Wittmayer Link: https://patch.msgid.link/20260515183921.23484-1-lucid_duck@justthetip.ca Signed-off-by: Felix Fietkau

wifi: mt76: mt7996: fix potential tx_retries underflow

2026-06-09T10:28:08+00:00

When FIELD_GET returns 0 for the retry count, subtracting 1 causes an unsigned integer underflow, resulting in tx_retries becoming a very large value (0xFFFFFFFF for u32). Fix by checking if count is non-zero before subtracting 1. Fixes: 2461599f835e ("wifi: mt76: mt7996: get tx_retries and tx_failed from txfree") Signed-off-by: Ryder Lee Link: https://patch.msgid.link/20260605113306.3485554-4-ryder.lee@mediatek.com Signed-off-by: Felix Fietkau

wifi: mt76: mt7925: fix potential tx_retries underflow

2026-06-09T10:28:08+00:00

When FIELD_GET returns 0 for the retry count, subtracting 1 causes an unsigned integer underflow, resulting in tx_retries becoming a very large value (0xFFFFFFFF for u32). Fix by checking if count is non-zero before subtracting 1. Fixes: c948b5da6bbe ("wifi: mt76: mt7925: add Mediatek Wi-Fi7 driver for mt7925 chips") Signed-off-by: Ryder Lee Link: https://patch.msgid.link/20260605113306.3485554-3-ryder.lee@mediatek.com Signed-off-by: Felix Fietkau

wifi: mt76: mt7921: fix potential tx_retries underflow

2026-06-09T10:28:08+00:00

When FIELD_GET returns 0 for the retry count, subtracting 1 causes an unsigned integer underflow, resulting in tx_retries becoming a very large value (0xFFFFFFFF for u32). Fix by checking if count is non-zero before subtracting 1. Fixes: 9aecfa754c7f ("wifi: mt76: mt7921e: report tx retries/failed counts in tx free event") Signed-off-by: Ryder Lee Link: https://patch.msgid.link/20260605113306.3485554-2-ryder.lee@mediatek.com Signed-off-by: Felix Fietkau

wifi: mt76: mt7915: fix potential tx_retries underflow

2026-06-09T10:28:08+00:00

When FIELD_GET returns 0 for the retry count, subtracting 1 causes an unsigned integer underflow, resulting in tx_retries becoming a very large value (0xFFFFFFFF for u32). Fix by checking if count is non-zero before subtracting 1. Fixes: 943e4fb96e6f ("wifi: mt76: mt7915: report tx retries/failed counts for non-WED path") Signed-off-by: Ryder Lee Link: https://patch.msgid.link/20260605113306.3485554-1-ryder.lee@mediatek.com Signed-off-by: Felix Fietkau

wifi: mt76: mt7921: disable auto regd changes after user set

2026-06-09T10:26:43+00:00

Add regd_user flag to block automatic regulatory domain updates if set by user. Co-developed-by: Sean Wang Signed-off-by: Sean Wang Signed-off-by: JB Tsai Link: https://patch.msgid.link/20260303053637.465465-5-jb.tsai@mediatek.com Signed-off-by: Felix Fietkau

wifi: mt76: mt7921: add auto regdomain switch support

2026-06-09T10:26:43+00:00

Implement 802.11d-based automatic regulatory domain switching to dynamically determine the regulatory domain at runtime. The scan-done event structure by reusing reserved padding and appending new fields; the layout and values remains backward-compatible with existing users. Co-developed-by: Sean Wang Signed-off-by: Sean Wang Signed-off-by: JB Tsai Link: https://patch.msgid.link/20260303053637.465465-4-jb.tsai@mediatek.com Signed-off-by: Felix Fietkau

wifi: mt76: mt7921: refactor regulatory notifier flow

2026-06-09T10:20:44+00:00

Rename mt7921_regd_update() to mt7921_mcu_regd_update() to centralize regd updates with error handling. Co-developed-by: Sean Wang Signed-off-by: Sean Wang Signed-off-by: JB Tsai Link: https://patch.msgid.link/20260303053637.465465-3-jb.tsai@mediatek.com Signed-off-by: Felix Fietkau

wifi: mt76: mt7921: refactor CLC support check flow

2026-06-09T10:20:44+00:00

Move the disable_clc module parameter to regd.c and introduce mt7921_regd_clc_supported() to centralize CLC support checks. Co-developed-by: Sean Wang Signed-off-by: Sean Wang Signed-off-by: JB Tsai Link: https://patch.msgid.link/20260303053637.465465-2-jb.tsai@mediatek.com Signed-off-by: Felix Fietkau