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wifi: mt76: mt7615: fix possible race in mt7615_mac_sta_poll

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[ Upstream commit 30bc32c7c1 ]

Grab sta_poll_lock spinlock in mt7615_mac_sta_poll routine in order to
avoid possible races with mt7615_mac_add_txs() or mt7615_mac_fill_rx()
removing msta pointer from sta_poll_list.

Fixes: a621372a04 ("mt76: mt7615: rework mt7615_mac_sta_poll for usb code")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/48b23404b759de4f1db2ef85975c72a4aeb1097c.1684938695.git.lorenzo@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Lorenzo Bianconi 2023-05-24 16:39:32 +02:00 • committed by Greg Kroah-Hartman
commit 99883d4a0b
1 changed files with 3 additions and 0 deletions
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3
drivers/net/wireless/mediatek/mt76/mt7615/mac.c
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@ -779,7 +779,10 @@ void mt7615_mac_sta_poll(struct mt7615_dev *dev)
msta = list_first_entry(&sta_poll_list, struct mt7615_sta,
poll_list);
spin_lock_bh(&dev->sta_poll_lock);
list_del_init(&msta->poll_list);
spin_unlock_bh(&dev->sta_poll_lock);
addr = mt7615_mac_wtbl_addr(dev, msta->wcid.idx) + 19 * 4;