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mt76: clear sta powersave flag after notifying driver

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If the driver has configured the hardware to drop packets for a sta that was
in powersave mode, then clearing the flag too early opens up a small race
window during which packets could be dropped on wakeup

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau
2021-11-25 13:42:32 +01:00
parent 2c70627b09
commit 608f7c47df
1 changed files with 4 additions and 2 deletions
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6
drivers/net/wireless/mediatek/mt76/mac80211.c
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@@ -1163,10 +1163,12 @@ mt76_check_sta(struct mt76_dev *dev, struct sk_buff *skb)
if (ps)
set_bit(MT_WCID_FLAG_PS, &wcid->flags);
else
clear_bit(MT_WCID_FLAG_PS, &wcid->flags);
dev->drv->sta_ps(dev, sta, ps);
if (!ps)
clear_bit(MT_WCID_FLAG_PS, &wcid->flags);
ieee80211_sta_ps_transition(sta, ps);
}