mt76: fix handling ps-poll frames

[ Upstream commit 36d910960fae3f9e74bedf3e0ef39ee26bdaa51f ]

Hardware station lookup for pspoll frames can fail, which makes the driver
ignore ps-poll frames. Fix the resulting powersave issues by looking up
the station for pspoll frames in software

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/wireless/mediatek/mt76/mac80211.c b/drivers/net/wireless/mediatek/mt76/mac80211.c
index ade4a20..1b5abd4 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mac80211.c
+++ b/drivers/net/wireless/mediatek/mt76/mac80211.c
@@ -548,6 +548,12 @@ mt76_check_ps(struct mt76_dev *dev, struct sk_buff *skb)
        struct mt76_wcid *wcid = status->wcid;
        bool ps;
 
+       if (ieee80211_is_pspoll(hdr->frame_control) && !wcid) {
+               sta = ieee80211_find_sta_by_ifaddr(dev->hw, hdr->addr2, NULL);
+               if (sta)
+                       wcid = status->wcid = (struct mt76_wcid *) sta->drv_priv;
+       }
+
        if (!wcid || !wcid->sta)
                return;