* FAILED: patch "[PATCH] wifi: mt76: mt7615: avoid waiting for mac work under the mt76" failed to apply to 5.10-stable tree
@ 2026-09-04 4:48 gregkh
2026-09-10 1:00 ` [PATCH 5.10.y 1/3] mt76: rely on mt76_phy in mt76_init_sband_2g and mt76_init_sband_5g Sasha Levin
0 siblings, 1 reply; 4+ messages in thread
From: gregkh @ 2026-09-04 4:48 UTC (permalink / raw)
To: runyu.xiao, nbd; +Cc: stable
The patch below does not apply to the 5.10-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y
git checkout FETCH_HEAD
git cherry-pick -x bda8324270b1ac91bfba1df8928e0570e29759e8
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026090448-broiling-unsworn-6960@gregkh' --subject-prefix 'PATCH 5.10.y' 'HEAD^..'
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From bda8324270b1ac91bfba1df8928e0570e29759e8 Mon Sep 17 00:00:00 2001
From: Runyu Xiao <runyu.xiao@seu.edu.cn>
Date: Fri, 12 Jun 2026 12:13:31 +0800
Subject: [PATCH] wifi: mt76: mt7615: avoid waiting for mac work under the mt76
mutex
mt7615_suspend() acquired the mt76 mutex and then called
cancel_delayed_work_sync() on mac_work. mt7615_mac_work() acquires the
same mutex via mt7615_mutex_acquire() at the top of the worker, so if
mac_work is already running and blocked on the mutex, the suspend path
deadlocks waiting for the work it holds the mutex against.
Flush scan_work and mac_work before taking the mutex, matching the
suspend paths in mt7921 and mt7925. scan_work only takes the mt76
spinlock, but moving it keeps the sequence consistent. This also keeps
mac_work from running over an already suspended HIF, which the previous
split (async cancel under the lock, sync cancel after release) would
have allowed.
Fixes: c6bf20109a3f ("mt76: mt7615: add WoW support")
Cc: stable@vger.kernel.org
Signed-off-by: Runyu Xiao <runyu.xiao@seu.edu.cn>
Link: https://patch.msgid.link/20260612041331.2596331-1-runyu.xiao@seu.edu.cn
Signed-off-by: Felix Fietkau <nbd@nbd.name>
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/main.c b/drivers/net/wireless/mediatek/mt76/mt7615/main.c
index fc619acbb40d..67f56e428d9a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/main.c
@@ -1239,11 +1239,12 @@ static int mt7615_suspend(struct ieee80211_hw *hw,
cancel_delayed_work_sync(&dev->pm.ps_work);
mt76_connac_free_pending_tx_skbs(&dev->pm, NULL);
+ cancel_delayed_work_sync(&phy->scan_work);
+ cancel_delayed_work_sync(&phy->mt76->mac_work);
+
mt7615_mutex_acquire(dev);
clear_bit(MT76_STATE_RUNNING, &phy->mt76->state);
- cancel_delayed_work_sync(&phy->scan_work);
- cancel_delayed_work_sync(&phy->mt76->mac_work);
set_bit(MT76_STATE_SUSPEND, &phy->mt76->state);
ieee80211_iterate_active_interfaces(hw,
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH 5.10.y 1/3] mt76: rely on mt76_phy in mt76_init_sband_2g and mt76_init_sband_5g
2026-09-04 4:48 FAILED: patch "[PATCH] wifi: mt76: mt7615: avoid waiting for mac work under the mt76" failed to apply to 5.10-stable tree gregkh
@ 2026-09-10 1:00 ` Sasha Levin
2026-09-10 1:00 ` [PATCH 5.10.y 2/3] mt76: move mac_work in mt76_core module Sasha Levin
2026-09-10 1:00 ` [PATCH 5.10.y 3/3] wifi: mt76: mt7615: avoid waiting for mac work under the mt76 mutex Sasha Levin
0 siblings, 2 replies; 4+ messages in thread
From: Sasha Levin @ 2026-09-10 1:00 UTC (permalink / raw)
To: stable; +Cc: Lorenzo Bianconi, Felix Fietkau, Sasha Levin
From: Lorenzo Bianconi <lorenzo@kernel.org>
[ Upstream commit 77af762e42f1f959d8a70c17c24accc96d7ee18d ]
This is a preliminary patch to properly support mt7915 dbdc
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Stable-dep-of: bda8324270b1 ("wifi: mt76: mt7615: avoid waiting for mac work under the mt76 mutex")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/mediatek/mt76/mac80211.c | 33 +++++++++----------
1 file changed, 16 insertions(+), 17 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mac80211.c b/drivers/net/wireless/mediatek/mt76/mac80211.c
index dc1191aa0443e..2976aad9c80d0 100644
--- a/drivers/net/wireless/mediatek/mt76/mac80211.c
+++ b/drivers/net/wireless/mediatek/mt76/mac80211.c
@@ -168,13 +168,14 @@ void mt76_set_stream_caps(struct mt76_phy *phy, bool vht)
EXPORT_SYMBOL_GPL(mt76_set_stream_caps);
static int
-mt76_init_sband(struct mt76_dev *dev, struct mt76_sband *msband,
+mt76_init_sband(struct mt76_phy *phy, struct mt76_sband *msband,
const struct ieee80211_channel *chan, int n_chan,
struct ieee80211_rate *rates, int n_rates, bool vht)
{
struct ieee80211_supported_band *sband = &msband->sband;
- struct ieee80211_sta_ht_cap *ht_cap;
struct ieee80211_sta_vht_cap *vht_cap;
+ struct ieee80211_sta_ht_cap *ht_cap;
+ struct mt76_dev *dev = phy->dev;
void *chanlist;
int size;
@@ -204,7 +205,7 @@ mt76_init_sband(struct mt76_dev *dev, struct mt76_sband *msband,
ht_cap->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
ht_cap->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
- mt76_init_stream_cap(&dev->phy, sband, vht);
+ mt76_init_stream_cap(phy, sband, vht);
if (!vht)
return 0;
@@ -222,27 +223,25 @@ mt76_init_sband(struct mt76_dev *dev, struct mt76_sband *msband,
}
static int
-mt76_init_sband_2g(struct mt76_dev *dev, struct ieee80211_rate *rates,
+mt76_init_sband_2g(struct mt76_phy *phy, struct ieee80211_rate *rates,
int n_rates)
{
- dev->hw->wiphy->bands[NL80211_BAND_2GHZ] = &dev->phy.sband_2g.sband;
+ phy->hw->wiphy->bands[NL80211_BAND_2GHZ] = &phy->sband_2g.sband;
- return mt76_init_sband(dev, &dev->phy.sband_2g,
- mt76_channels_2ghz,
- ARRAY_SIZE(mt76_channels_2ghz),
- rates, n_rates, false);
+ return mt76_init_sband(phy, &phy->sband_2g, mt76_channels_2ghz,
+ ARRAY_SIZE(mt76_channels_2ghz), rates,
+ n_rates, false);
}
static int
-mt76_init_sband_5g(struct mt76_dev *dev, struct ieee80211_rate *rates,
+mt76_init_sband_5g(struct mt76_phy *phy, struct ieee80211_rate *rates,
int n_rates, bool vht)
{
- dev->hw->wiphy->bands[NL80211_BAND_5GHZ] = &dev->phy.sband_5g.sband;
+ phy->hw->wiphy->bands[NL80211_BAND_5GHZ] = &phy->sband_5g.sband;
- return mt76_init_sband(dev, &dev->phy.sband_5g,
- mt76_channels_5ghz,
- ARRAY_SIZE(mt76_channels_5ghz),
- rates, n_rates, vht);
+ return mt76_init_sband(phy, &phy->sband_5g, mt76_channels_5ghz,
+ ARRAY_SIZE(mt76_channels_5ghz), rates,
+ n_rates, vht);
}
static void
@@ -464,13 +463,13 @@ int mt76_register_device(struct mt76_dev *dev, bool vht,
mt76_phy_init(dev, hw);
if (phy->cap.has_2ghz) {
- ret = mt76_init_sband_2g(dev, rates, n_rates);
+ ret = mt76_init_sband_2g(phy, rates, n_rates);
if (ret)
return ret;
}
if (phy->cap.has_5ghz) {
- ret = mt76_init_sband_5g(dev, rates + 4, n_rates - 4, vht);
+ ret = mt76_init_sband_5g(phy, rates + 4, n_rates - 4, vht);
if (ret)
return ret;
}
--
2.53.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH 5.10.y 2/3] mt76: move mac_work in mt76_core module
2026-09-10 1:00 ` [PATCH 5.10.y 1/3] mt76: rely on mt76_phy in mt76_init_sband_2g and mt76_init_sband_5g Sasha Levin
@ 2026-09-10 1:00 ` Sasha Levin
2026-09-10 1:00 ` [PATCH 5.10.y 3/3] wifi: mt76: mt7615: avoid waiting for mac work under the mt76 mutex Sasha Levin
1 sibling, 0 replies; 4+ messages in thread
From: Sasha Levin @ 2026-09-10 1:00 UTC (permalink / raw)
To: stable; +Cc: Lorenzo Bianconi, Sean Wang, Felix Fietkau, Sasha Levin
From: Lorenzo Bianconi <lorenzo@kernel.org>
[ Upstream commit a782f8bfdd46a6028dee41b99a990534737ad997 ]
Move mac_work delayed_work and mac_work_count in mt76_phy since it is
used by all drivers. This is a preliminary patch to create a common mcu
library used by mt7615 and mt7921 drivers
Co-developed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Stable adaptation: retain the 5.10 device-based testmode data and API,
mt7603 tasklet_init callback, and unconditional mt7915 watchdog scheduling.
Apply the external-PHY watchdog initialization change to the existing
mt7915_register_ext_phy implementation at its stable-tree location.
No functions or newer testmode/DBDC infrastructure are added.
This keeps the MAC work relocation needed by bda8324270b1 while preserving
stable suspend helpers and beacon filtering. The target applies cleanly
with a three-way application after this dependency.
Stable-dep-of: bda8324270b1 ("wifi: mt76: mt7615: avoid waiting for mac work under the mt76 mutex")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/mediatek/mt76/mt76.h | 4 ++-
.../net/wireless/mediatek/mt76/mt7603/init.c | 2 +-
.../net/wireless/mediatek/mt76/mt7603/mac.c | 14 ++++-----
.../net/wireless/mediatek/mt76/mt7603/main.c | 10 +++----
.../wireless/mediatek/mt76/mt7603/mt7603.h | 2 --
.../net/wireless/mediatek/mt76/mt7615/init.c | 4 +--
.../net/wireless/mediatek/mt76/mt7615/mac.c | 25 ++++++++--------
.../net/wireless/mediatek/mt76/mt7615/main.c | 13 +++++----
.../wireless/mediatek/mt76/mt7615/mt7615.h | 3 --
.../net/wireless/mediatek/mt76/mt7615/usb.c | 2 +-
.../net/wireless/mediatek/mt76/mt76x0/pci.c | 4 +--
.../net/wireless/mediatek/mt76/mt76x0/usb.c | 4 +--
.../net/wireless/mediatek/mt76/mt76x02_mac.c | 4 +--
.../net/wireless/mediatek/mt76/mt76x02_util.c | 2 +-
.../wireless/mediatek/mt76/mt76x2/pci_init.c | 2 +-
.../wireless/mediatek/mt76/mt76x2/pci_main.c | 2 +-
.../wireless/mediatek/mt76/mt76x2/usb_init.c | 2 +-
.../wireless/mediatek/mt76/mt76x2/usb_main.c | 2 +-
.../net/wireless/mediatek/mt76/mt7915/init.c | 4 +--
.../net/wireless/mediatek/mt76/mt7915/mac.c | 29 ++++++++++---------
.../net/wireless/mediatek/mt76/mt7915/main.c | 9 +++---
.../wireless/mediatek/mt76/mt7915/mt7915.h | 2 --
22 files changed, 72 insertions(+), 73 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h
index 16e65020a242d..4a71c61f25c75 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76.h
@@ -569,6 +569,9 @@ struct mt76_phy {
int txpower_cur;
u8 antenna_mask;
+
+ struct delayed_work mac_work;
+ u8 mac_work_count;
};
struct mt76_dev {
@@ -609,7 +612,6 @@ struct mt76_dev {
struct mt76_worker tx_worker;
struct napi_struct tx_napi;
- struct delayed_work mac_work;
wait_queue_head_t tx_wait;
struct sk_buff_head status_list;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7603/init.c b/drivers/net/wireless/mediatek/mt76/mt7603/init.c
index c4848fafd2705..06f3e7ef41409 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7603/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7603/init.c
@@ -532,7 +532,7 @@ int mt7603_register_device(struct mt7603_dev *dev)
spin_lock_init(&dev->sta_poll_lock);
spin_lock_init(&dev->ps_lock);
- INIT_DELAYED_WORK(&dev->mt76.mac_work, mt7603_mac_work);
+ INIT_DELAYED_WORK(&dev->mphy.mac_work, mt7603_mac_work);
tasklet_init(&dev->mt76.pre_tbtt_tasklet, mt7603_pre_tbtt_tasklet,
(unsigned long)dev);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7603/mac.c b/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
index 9eb898ebbb445..05a79715b5393 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
@@ -1796,7 +1796,7 @@ mt7603_false_cca_check(struct mt7603_dev *dev)
void mt7603_mac_work(struct work_struct *work)
{
struct mt7603_dev *dev = container_of(work, struct mt7603_dev,
- mt76.mac_work.work);
+ mphy.mac_work.work);
bool reset = false;
int i, idx;
@@ -1804,7 +1804,7 @@ void mt7603_mac_work(struct work_struct *work)
mutex_lock(&dev->mt76.mutex);
- dev->mac_work_count++;
+ dev->mphy.mac_work_count++;
mt76_update_survey(&dev->mt76);
mt7603_edcca_check(dev);
@@ -1815,7 +1815,7 @@ void mt7603_mac_work(struct work_struct *work)
dev->mt76.aggr_stats[idx++] += val >> 16;
}
- if (dev->mac_work_count == 10)
+ if (dev->mphy.mac_work_count == 10)
mt7603_false_cca_check(dev);
if (mt7603_watchdog_check(dev, &dev->rx_pse_check,
@@ -1846,17 +1846,17 @@ void mt7603_mac_work(struct work_struct *work)
dev->rx_dma_idx = ~0;
memset(dev->tx_dma_idx, 0xff, sizeof(dev->tx_dma_idx));
reset = true;
- dev->mac_work_count = 0;
+ dev->mphy.mac_work_count = 0;
}
- if (dev->mac_work_count >= 10)
- dev->mac_work_count = 0;
+ if (dev->mphy.mac_work_count >= 10)
+ dev->mphy.mac_work_count = 0;
mutex_unlock(&dev->mt76.mutex);
if (reset)
mt7603_mac_watchdog_reset(dev);
- ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mt76.mac_work,
+ ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mphy.mac_work,
msecs_to_jiffies(MT7603_WATCHDOG_TIME));
}
diff --git a/drivers/net/wireless/mediatek/mt76/mt7603/main.c b/drivers/net/wireless/mediatek/mt76/mt7603/main.c
index bdff89cc3105e..bd4604e09a759 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7603/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7603/main.c
@@ -17,7 +17,7 @@ mt7603_start(struct ieee80211_hw *hw)
mt7603_mac_start(dev);
dev->mphy.survey_time = ktime_get_boottime();
set_bit(MT76_STATE_RUNNING, &dev->mphy.state);
- mt7603_mac_work(&dev->mt76.mac_work.work);
+ mt7603_mac_work(&dev->mphy.mac_work.work);
return 0;
}
@@ -28,7 +28,7 @@ mt7603_stop(struct ieee80211_hw *hw)
struct mt7603_dev *dev = hw->priv;
clear_bit(MT76_STATE_RUNNING, &dev->mphy.state);
- cancel_delayed_work_sync(&dev->mt76.mac_work);
+ cancel_delayed_work_sync(&dev->mphy.mac_work);
mt7603_mac_stop(dev);
}
@@ -137,7 +137,7 @@ mt7603_set_channel(struct mt7603_dev *dev, struct cfg80211_chan_def *def)
u8 bw = MT_BW_20;
bool failed = false;
- cancel_delayed_work_sync(&dev->mt76.mac_work);
+ cancel_delayed_work_sync(&dev->mphy.mac_work);
tasklet_disable(&dev->mt76.pre_tbtt_tasklet);
mutex_lock(&dev->mt76.mutex);
@@ -178,7 +178,7 @@ mt7603_set_channel(struct mt7603_dev *dev, struct cfg80211_chan_def *def)
mt76_txq_schedule_all(&dev->mphy);
- ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mt76.mac_work,
+ ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mphy.mac_work,
msecs_to_jiffies(MT7603_WATCHDOG_TIME));
/* reset channel stats */
@@ -200,7 +200,7 @@ mt7603_set_channel(struct mt7603_dev *dev, struct cfg80211_chan_def *def)
tasklet_enable(&dev->mt76.pre_tbtt_tasklet);
if (failed)
- mt7603_mac_work(&dev->mt76.mac_work.work);
+ mt7603_mac_work(&dev->mphy.mac_work.work);
return ret;
}
diff --git a/drivers/net/wireless/mediatek/mt76/mt7603/mt7603.h b/drivers/net/wireless/mediatek/mt76/mt7603/mt7603.h
index 2a6e4332ad06d..d7a199007c101 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7603/mt7603.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7603/mt7603.h
@@ -132,8 +132,6 @@ struct mt7603_dev {
spinlock_t ps_lock;
- u8 mac_work_count;
-
u8 mcu_running;
u8 ed_monitor_enabled;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/init.c b/drivers/net/wireless/mediatek/mt76/mt7615/init.c
index e194259c84e90..902750ea7e0bf 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/init.c
@@ -408,7 +408,7 @@ int mt7615_register_ext_phy(struct mt7615_dev *dev)
mphy->antenna_mask = BIT(hweight8(phy->chainmask)) - 1;
mt7615_init_wiphy(mphy->hw);
- INIT_DELAYED_WORK(&phy->mac_work, mt7615_mac_work);
+ INIT_DELAYED_WORK(&mphy->mac_work, mt7615_mac_work);
INIT_DELAYED_WORK(&phy->scan_work, mt7615_scan_work);
skb_queue_head_init(&phy->scan_event_list);
@@ -464,7 +464,7 @@ void mt7615_init_device(struct mt7615_dev *dev)
init_completion(&dev->pm.wake_cmpl);
spin_lock_init(&dev->pm.txq_lock);
set_bit(MT76_STATE_PM, &dev->mphy.state);
- INIT_DELAYED_WORK(&dev->phy.mac_work, mt7615_mac_work);
+ INIT_DELAYED_WORK(&dev->mphy.mac_work, mt7615_mac_work);
INIT_DELAYED_WORK(&dev->phy.scan_work, mt7615_scan_work);
skb_queue_head_init(&dev->phy.scan_event_list);
INIT_LIST_HEAD(&dev->sta_poll_list);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
index 0c9201e073b27..519a6ffd21195 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
@@ -2015,17 +2015,17 @@ int mt7615_pm_set_enable(struct mt7615_dev *dev, bool enable)
void mt7615_mac_work(struct work_struct *work)
{
struct mt7615_phy *phy;
- struct mt76_dev *mdev;
+ struct mt76_phy *mphy;
- phy = (struct mt7615_phy *)container_of(work, struct mt7615_phy,
- mac_work.work);
- mdev = &phy->dev->mt76;
+ mphy = (struct mt76_phy *)container_of(work, struct mt76_phy,
+ mac_work.work);
+ phy = mphy->priv;
mt7615_mutex_acquire(phy->dev);
mt7615_update_survey(phy->dev);
- if (++phy->mac_work_count == 5) {
- phy->mac_work_count = 0;
+ if (++mphy->mac_work_count == 5) {
+ mphy->mac_work_count = 0;
mt7615_mac_update_mib_stats(phy);
mt7615_mac_scs_check(phy);
@@ -2033,8 +2033,8 @@ void mt7615_mac_work(struct work_struct *work)
mt7615_mutex_release(phy->dev);
- mt76_tx_status_check(mdev, NULL, false);
- ieee80211_queue_delayed_work(phy->mt76->hw, &phy->mac_work,
+ mt76_tx_status_check(mphy->dev, NULL, false);
+ ieee80211_queue_delayed_work(mphy->hw, &mphy->mac_work,
MT7615_WATCHDOG_TIME);
}
@@ -2137,11 +2137,11 @@ void mt7615_mac_reset_work(struct work_struct *work)
set_bit(MT76_RESET, &dev->mphy.state);
set_bit(MT76_MCU_RESET, &dev->mphy.state);
wake_up(&dev->mt76.mcu.wait);
- cancel_delayed_work_sync(&dev->phy.mac_work);
+ cancel_delayed_work_sync(&dev->mphy.mac_work);
del_timer_sync(&dev->phy.roc_timer);
cancel_work_sync(&dev->phy.roc_work);
if (phy2) {
- cancel_delayed_work_sync(&phy2->mac_work);
+ cancel_delayed_work_sync(&phy2->mt76->mac_work);
del_timer_sync(&phy2->roc_timer);
cancel_work_sync(&phy2->roc_work);
}
@@ -2196,10 +2196,11 @@ void mt7615_mac_reset_work(struct work_struct *work)
mt7615_mutex_release(dev);
- ieee80211_queue_delayed_work(mt76_hw(dev), &dev->phy.mac_work,
+ ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mphy.mac_work,
MT7615_WATCHDOG_TIME);
if (phy2)
- ieee80211_queue_delayed_work(ext_phy->hw, &phy2->mac_work,
+ ieee80211_queue_delayed_work(ext_phy->hw,
+ &phy2->mt76->mac_work,
MT7615_WATCHDOG_TIME);
}
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/main.c b/drivers/net/wireless/mediatek/mt76/mt7615/main.c
index defa207f53d6f..c67ac255059d9 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/main.c
@@ -70,7 +70,7 @@ static int mt7615_start(struct ieee80211_hw *hw)
set_bit(MT76_STATE_RUNNING, &phy->mt76->state);
- ieee80211_queue_delayed_work(hw, &phy->mac_work,
+ ieee80211_queue_delayed_work(hw, &phy->mt76->mac_work,
MT7615_WATCHDOG_TIME);
if (!running)
@@ -86,7 +86,7 @@ static void mt7615_stop(struct ieee80211_hw *hw)
struct mt7615_dev *dev = mt7615_hw_dev(hw);
struct mt7615_phy *phy = mt7615_hw_phy(hw);
- cancel_delayed_work_sync(&phy->mac_work);
+ cancel_delayed_work_sync(&phy->mt76->mac_work);
del_timer_sync(&phy->roc_timer);
cancel_work_sync(&phy->roc_work);
@@ -293,7 +293,7 @@ int mt7615_set_channel(struct mt7615_phy *phy)
bool ext_phy = phy != &dev->phy;
int ret;
- cancel_delayed_work_sync(&phy->mac_work);
+ cancel_delayed_work_sync(&phy->mt76->mac_work);
mt7615_mutex_acquire(dev);
@@ -328,7 +328,8 @@ int mt7615_set_channel(struct mt7615_phy *phy)
mt76_txq_schedule_all(phy->mt76);
if (!mt76_testmode_enabled(&dev->mt76))
- ieee80211_queue_delayed_work(phy->mt76->hw, &phy->mac_work,
+ ieee80211_queue_delayed_work(phy->mt76->hw,
+ &phy->mt76->mac_work,
MT7615_WATCHDOG_TIME);
return ret;
@@ -1146,7 +1147,7 @@ static int mt7615_suspend(struct ieee80211_hw *hw,
clear_bit(MT76_STATE_RUNNING, &phy->mt76->state);
cancel_delayed_work_sync(&phy->scan_work);
- cancel_delayed_work_sync(&phy->mac_work);
+ cancel_delayed_work_sync(&phy->mt76->mac_work);
mt76_set(dev, MT_WF_RFCR(ext_phy), MT_WF_RFCR_DROP_OTHER_BEACON);
@@ -1189,7 +1190,7 @@ static int mt7615_resume(struct ieee80211_hw *hw)
IEEE80211_IFACE_ITER_RESUME_ALL,
mt7615_mcu_set_suspend_iter, phy);
- ieee80211_queue_delayed_work(hw, &phy->mac_work,
+ ieee80211_queue_delayed_work(hw, &phy->mt76->mac_work,
MT7615_WATCHDOG_TIME);
mt76_clear(dev, MT_WF_RFCR(ext_phy), MT_WF_RFCR_DROP_OTHER_BEACON);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h b/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
index 4cee76691786e..7489c2147cc82 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
@@ -201,9 +201,6 @@ struct mt7615_phy {
struct mib_stats mib;
- struct delayed_work mac_work;
- u8 mac_work_count;
-
struct sk_buff_head scan_event_list;
struct delayed_work scan_work;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/usb.c b/drivers/net/wireless/mediatek/mt76/mt7615/usb.c
index f0ad83af9e004..484c184f038ca 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/usb.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/usb.c
@@ -29,7 +29,7 @@ static void mt7663u_stop(struct ieee80211_hw *hw)
del_timer_sync(&phy->roc_timer);
cancel_work_sync(&phy->roc_work);
cancel_delayed_work_sync(&phy->scan_work);
- cancel_delayed_work_sync(&phy->mac_work);
+ cancel_delayed_work_sync(&phy->mt76->mac_work);
mt76u_stop_tx(&dev->mt76);
}
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/pci.c b/drivers/net/wireless/mediatek/mt76/mt76x0/pci.c
index b87d8e136cb9a..02d0aa0b815e9 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x0/pci.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/pci.c
@@ -16,7 +16,7 @@ static int mt76x0e_start(struct ieee80211_hw *hw)
mt76x02_mac_start(dev);
mt76x0_phy_calibrate(dev, true);
- ieee80211_queue_delayed_work(dev->mt76.hw, &dev->mt76.mac_work,
+ ieee80211_queue_delayed_work(dev->mt76.hw, &dev->mphy.mac_work,
MT_MAC_WORK_INTERVAL);
ieee80211_queue_delayed_work(dev->mt76.hw, &dev->cal_work,
MT_CALIBRATE_INTERVAL);
@@ -28,7 +28,7 @@ static int mt76x0e_start(struct ieee80211_hw *hw)
static void mt76x0e_stop_hw(struct mt76x02_dev *dev)
{
cancel_delayed_work_sync(&dev->cal_work);
- cancel_delayed_work_sync(&dev->mt76.mac_work);
+ cancel_delayed_work_sync(&dev->mphy.mac_work);
clear_bit(MT76_RESTART, &dev->mphy.state);
if (!mt76_poll(dev, MT_WPDMA_GLO_CFG, MT_WPDMA_GLO_CFG_TX_DMA_BUSY,
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c b/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c
index ce6b286a81528..f919b65be08e5 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c
@@ -82,7 +82,7 @@ static void mt76x0u_stop(struct ieee80211_hw *hw)
clear_bit(MT76_STATE_RUNNING, &dev->mphy.state);
cancel_delayed_work_sync(&dev->cal_work);
- cancel_delayed_work_sync(&dev->mt76.mac_work);
+ cancel_delayed_work_sync(&dev->mphy.mac_work);
mt76u_stop_tx(&dev->mt76);
mt76x02u_exit_beacon_config(dev);
@@ -108,7 +108,7 @@ static int mt76x0u_start(struct ieee80211_hw *hw)
return ret;
mt76x0_phy_calibrate(dev, true);
- ieee80211_queue_delayed_work(dev->mt76.hw, &dev->mt76.mac_work,
+ ieee80211_queue_delayed_work(dev->mt76.hw, &dev->mphy.mac_work,
MT_MAC_WORK_INTERVAL);
ieee80211_queue_delayed_work(dev->mt76.hw, &dev->cal_work,
MT_CALIBRATE_INTERVAL);
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c b/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c
index 677082d8659a6..2417418382351 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c
@@ -1163,7 +1163,7 @@ static void mt76x02_edcca_check(struct mt76x02_dev *dev)
void mt76x02_mac_work(struct work_struct *work)
{
struct mt76x02_dev *dev = container_of(work, struct mt76x02_dev,
- mt76.mac_work.work);
+ mphy.mac_work.work);
int i, idx;
mutex_lock(&dev->mt76.mutex);
@@ -1186,7 +1186,7 @@ void mt76x02_mac_work(struct work_struct *work)
mt76_tx_status_check(&dev->mt76, NULL, false);
- ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mt76.mac_work,
+ ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mphy.mac_work,
MT_MAC_WORK_INTERVAL);
}
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_util.c b/drivers/net/wireless/mediatek/mt76/mt76x02_util.c
index 0f191bd28417c..ca28bb0c744d9 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x02_util.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_util.c
@@ -149,7 +149,7 @@ void mt76x02_init_device(struct mt76x02_dev *dev)
struct ieee80211_hw *hw = mt76_hw(dev);
struct wiphy *wiphy = hw->wiphy;
- INIT_DELAYED_WORK(&dev->mt76.mac_work, mt76x02_mac_work);
+ INIT_DELAYED_WORK(&dev->mphy.mac_work, mt76x02_mac_work);
hw->queues = 4;
hw->max_rates = 1;
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c b/drivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c
index 48a3ebc9892a9..4d35c3b793735 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x2/pci_init.c
@@ -271,7 +271,7 @@ static int mt76x2_init_hardware(struct mt76x02_dev *dev)
void mt76x2_stop_hardware(struct mt76x02_dev *dev)
{
cancel_delayed_work_sync(&dev->cal_work);
- cancel_delayed_work_sync(&dev->mt76.mac_work);
+ cancel_delayed_work_sync(&dev->mphy.mac_work);
cancel_delayed_work_sync(&dev->wdt_work);
clear_bit(MT76_RESTART, &dev->mphy.state);
mt76x02_mcu_set_radio_state(dev, false);
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2/pci_main.c b/drivers/net/wireless/mediatek/mt76/mt76x2/pci_main.c
index 98f4cf3983207..93fa3f644bb87 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x2/pci_main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x2/pci_main.c
@@ -14,7 +14,7 @@ mt76x2_start(struct ieee80211_hw *hw)
mt76x02_mac_start(dev);
mt76x2_phy_start(dev);
- ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mt76.mac_work,
+ ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mphy.mac_work,
MT_MAC_WORK_INTERVAL);
ieee80211_queue_delayed_work(mt76_hw(dev), &dev->wdt_work,
MT_WATCHDOG_TIME);
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c b/drivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c
index c845e83897659..41b9a99665822 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x2/usb_init.c
@@ -247,7 +247,7 @@ int mt76x2u_register_device(struct mt76x02_dev *dev)
void mt76x2u_stop_hw(struct mt76x02_dev *dev)
{
cancel_delayed_work_sync(&dev->cal_work);
- cancel_delayed_work_sync(&dev->mt76.mac_work);
+ cancel_delayed_work_sync(&dev->mphy.mac_work);
mt76x2u_mac_stop(dev);
}
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2/usb_main.c b/drivers/net/wireless/mediatek/mt76/mt76x2/usb_main.c
index bab4e6e1904ea..b66836928d9dc 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x2/usb_main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x2/usb_main.c
@@ -15,7 +15,7 @@ static int mt76x2u_start(struct ieee80211_hw *hw)
if (ret)
return ret;
- ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mt76.mac_work,
+ ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mphy.mac_work,
MT_MAC_WORK_INTERVAL);
set_bit(MT76_STATE_RUNNING, &dev->mphy.state);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/init.c b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
index 99683688a8363..72854de6e3d26 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
@@ -618,7 +618,7 @@ int mt7915_register_ext_phy(struct mt7915_dev *dev)
mt7915_init_wiphy(mphy->hw);
INIT_LIST_HEAD(&phy->stats_list);
- INIT_DELAYED_WORK(&phy->mac_work, mt7915_mac_work);
+ INIT_DELAYED_WORK(&mphy->mac_work, mt7915_mac_work);
/*
* Make the secondary PHY MAC address local without overlapping with
@@ -660,7 +660,7 @@ int mt7915_register_device(struct mt7915_dev *dev)
dev->mt76.phy.priv = &dev->phy;
INIT_LIST_HEAD(&dev->phy.stats_list);
INIT_WORK(&dev->rc_work, mt7915_mac_sta_rc_work);
- INIT_DELAYED_WORK(&dev->phy.mac_work, mt7915_mac_work);
+ INIT_DELAYED_WORK(&dev->mphy.mac_work, mt7915_mac_work);
INIT_LIST_HEAD(&dev->sta_rc_list);
INIT_LIST_HEAD(&dev->sta_poll_list);
spin_lock_init(&dev->sta_poll_lock);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index 1e14d7782841e..8e73b62acfccf 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -1209,9 +1209,9 @@ void mt7915_mac_reset_work(struct work_struct *work)
set_bit(MT76_RESET, &dev->mphy.state);
set_bit(MT76_MCU_RESET, &dev->mphy.state);
wake_up(&dev->mt76.mcu.wait);
- cancel_delayed_work_sync(&dev->phy.mac_work);
+ cancel_delayed_work_sync(&dev->mphy.mac_work);
if (phy2)
- cancel_delayed_work_sync(&phy2->mac_work);
+ cancel_delayed_work_sync(&phy2->mt76->mac_work);
/* lock/unlock all queues to ensure that no tx is pending */
mt76_txq_schedule_all(&dev->mphy);
@@ -1262,10 +1262,11 @@ void mt7915_mac_reset_work(struct work_struct *work)
mt7915_update_beacons(dev);
- ieee80211_queue_delayed_work(mt76_hw(dev), &dev->phy.mac_work,
+ ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mphy.mac_work,
MT7915_WATCHDOG_TIME);
if (phy2)
- ieee80211_queue_delayed_work(ext_phy->hw, &phy2->mac_work,
+ ieee80211_queue_delayed_work(ext_phy->hw,
+ &phy2->mt76->mac_work,
MT7915_WATCHDOG_TIME);
}
@@ -1367,17 +1368,17 @@ void mt7915_mac_sta_rc_work(struct work_struct *work)
void mt7915_mac_work(struct work_struct *work)
{
struct mt7915_phy *phy;
- struct mt76_dev *mdev;
+ struct mt76_phy *mphy;
- phy = (struct mt7915_phy *)container_of(work, struct mt7915_phy,
- mac_work.work);
- mdev = &phy->dev->mt76;
+ mphy = (struct mt76_phy *)container_of(work, struct mt76_phy,
+ mac_work.work);
+ phy = mphy->priv;
- mutex_lock(&mdev->mutex);
+ mutex_lock(&mphy->dev->mutex);
- mt76_update_survey(mdev);
- if (++phy->mac_work_count == 5) {
- phy->mac_work_count = 0;
+ mt76_update_survey(mphy->dev);
+ if (++mphy->mac_work_count == 5) {
+ mphy->mac_work_count = 0;
mt7915_mac_update_mib_stats(phy);
}
@@ -1387,9 +1388,9 @@ void mt7915_mac_work(struct work_struct *work)
mt7915_mac_sta_stats_work(phy);
};
- mutex_unlock(&mdev->mutex);
+ mutex_unlock(&mphy->dev->mutex);
- ieee80211_queue_delayed_work(phy->mt76->hw, &phy->mac_work,
+ ieee80211_queue_delayed_work(mphy->hw, &mphy->mac_work,
MT7915_WATCHDOG_TIME);
}
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/main.c b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
index 6495d2edf7dc4..3bfeddd1cf23d 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
@@ -47,7 +47,7 @@ static int mt7915_start(struct ieee80211_hw *hw)
set_bit(MT76_STATE_RUNNING, &phy->mt76->state);
- ieee80211_queue_delayed_work(hw, &phy->mac_work,
+ ieee80211_queue_delayed_work(hw, &phy->mt76->mac_work,
MT7915_WATCHDOG_TIME);
if (!running)
@@ -63,7 +63,7 @@ static void mt7915_stop(struct ieee80211_hw *hw)
struct mt7915_dev *dev = mt7915_hw_dev(hw);
struct mt7915_phy *phy = mt7915_hw_phy(hw);
- cancel_delayed_work_sync(&phy->mac_work);
+ cancel_delayed_work_sync(&phy->mt76->mac_work);
mutex_lock(&dev->mt76.mutex);
@@ -227,7 +227,7 @@ static int mt7915_set_channel(struct mt7915_phy *phy)
struct mt7915_dev *dev = phy->dev;
int ret;
- cancel_delayed_work_sync(&phy->mac_work);
+ cancel_delayed_work_sync(&phy->mt76->mac_work);
mutex_lock(&dev->mt76.mutex);
set_bit(MT76_RESET, &phy->mt76->state);
@@ -251,7 +251,8 @@ static int mt7915_set_channel(struct mt7915_phy *phy)
mutex_unlock(&dev->mt76.mutex);
mt76_txq_schedule_all(phy->mt76);
- ieee80211_queue_delayed_work(phy->mt76->hw, &phy->mac_work,
+ ieee80211_queue_delayed_work(phy->mt76->hw,
+ &phy->mt76->mac_work,
MT7915_WATCHDOG_TIME);
return ret;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
index c84110e34ede1..89921b6db2710 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
@@ -130,8 +130,6 @@ struct mt7915_phy {
struct mib_stats mib;
struct list_head stats_list;
- struct delayed_work mac_work;
- u8 mac_work_count;
u8 sta_work_count;
};
--
2.53.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH 5.10.y 3/3] wifi: mt76: mt7615: avoid waiting for mac work under the mt76 mutex
2026-09-10 1:00 ` [PATCH 5.10.y 1/3] mt76: rely on mt76_phy in mt76_init_sband_2g and mt76_init_sband_5g Sasha Levin
2026-09-10 1:00 ` [PATCH 5.10.y 2/3] mt76: move mac_work in mt76_core module Sasha Levin
@ 2026-09-10 1:00 ` Sasha Levin
1 sibling, 0 replies; 4+ messages in thread
From: Sasha Levin @ 2026-09-10 1:00 UTC (permalink / raw)
To: stable; +Cc: Runyu Xiao, Felix Fietkau, Sasha Levin
From: Runyu Xiao <runyu.xiao@seu.edu.cn>
[ Upstream commit bda8324270b1ac91bfba1df8928e0570e29759e8 ]
mt7615_suspend() acquired the mt76 mutex and then called
cancel_delayed_work_sync() on mac_work. mt7615_mac_work() acquires the
same mutex via mt7615_mutex_acquire() at the top of the worker, so if
mac_work is already running and blocked on the mutex, the suspend path
deadlocks waiting for the work it holds the mutex against.
Flush scan_work and mac_work before taking the mutex, matching the
suspend paths in mt7921 and mt7925. scan_work only takes the mt76
spinlock, but moving it keeps the sequence consistent. This also keeps
mac_work from running over an already suspended HIF, which the previous
split (async cancel under the lock, sync cancel after release) would
have allowed.
Fixes: c6bf20109a3f ("mt76: mt7615: add WoW support")
Cc: stable@vger.kernel.org
Signed-off-by: Runyu Xiao <runyu.xiao@seu.edu.cn>
Link: https://patch.msgid.link/20260612041331.2596331-1-runyu.xiao@seu.edu.cn
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/mediatek/mt76/mt7615/main.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/main.c b/drivers/net/wireless/mediatek/mt76/mt7615/main.c
index c67ac255059d9..7c05fc6e8c1b5 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/main.c
@@ -1143,11 +1143,12 @@ static int mt7615_suspend(struct ieee80211_hw *hw,
cancel_delayed_work_sync(&dev->pm.ps_work);
mt7615_free_pending_tx_skbs(dev, NULL);
+ cancel_delayed_work_sync(&phy->scan_work);
+ cancel_delayed_work_sync(&phy->mt76->mac_work);
+
mt7615_mutex_acquire(dev);
clear_bit(MT76_STATE_RUNNING, &phy->mt76->state);
- cancel_delayed_work_sync(&phy->scan_work);
- cancel_delayed_work_sync(&phy->mt76->mac_work);
mt76_set(dev, MT_WF_RFCR(ext_phy), MT_WF_RFCR_DROP_OTHER_BEACON);
--
2.53.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
end of thread, other threads:[~2026-09-10 1:00 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-09-04 4:48 FAILED: patch "[PATCH] wifi: mt76: mt7615: avoid waiting for mac work under the mt76" failed to apply to 5.10-stable tree gregkh
2026-09-10 1:00 ` [PATCH 5.10.y 1/3] mt76: rely on mt76_phy in mt76_init_sband_2g and mt76_init_sband_5g Sasha Levin
2026-09-10 1:00 ` [PATCH 5.10.y 2/3] mt76: move mac_work in mt76_core module Sasha Levin
2026-09-10 1:00 ` [PATCH 5.10.y 3/3] wifi: mt76: mt7615: avoid waiting for mac work under the mt76 mutex Sasha Levin
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