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mt76: mt7921: fix crash when startup fails.

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[ Upstream commit 827e7799c6 ]

If the nic fails to start, it is possible that the
reset_work has already been scheduled.  Ensure the
work item is canceled so we do not have use-after-free
crash in case cleanup is called before the work item
is executed.

This fixes crash on my x86_64 apu2 when mt7921k radio
fails to work.  Radio still fails, but OS does not
crash.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ben Greear
2022-01-08 11:08:14 -08:00
committed by Greg Kroah-Hartman
parent 793a370458
commit 38fbe80664
1 changed files with 1 additions and 0 deletions
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1
drivers/net/wireless/mediatek/mt76/mt7921/main.c
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@@ -224,6 +224,7 @@ static void mt7921_stop(struct ieee80211_hw *hw)
cancel_delayed_work_sync(&dev->pm.ps_work);
cancel_work_sync(&dev->pm.wake_work);
cancel_work_sync(&dev->reset_work);
mt76_connac_free_pending_tx_skbs(&dev->pm, NULL);
mt7921_mutex_acquire(dev);