diff mbox series

mt76: mt7921: fix crash when startup fails.

Message ID 20220108190814.3841-1-greearb@candelatech.com (mailing list archive)
State Accepted
Delegated to: Felix Fietkau
Headers show
Series mt76: mt7921: fix crash when startup fails. | expand

Commit Message

Ben Greear Jan. 8, 2022, 7:08 p.m. UTC 
From: Ben Greear <greearb@candelatech.com>

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>
---
 drivers/net/wireless/mediatek/mt76/mt7921/main.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/main.c b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
index 6073bedaa1c08..9b33002dcba4a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
@@ -272,6 +272,7 @@  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);