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List:       linux-wireless
Subject:    [PATCH 1/2] mt76: fix handling ps-poll frames
From:       Felix Fietkau <nbd () nbd ! name>
Date:       2018-09-29 13:05:49
Message-ID: 20180929130550.86187-1-nbd () nbd ! name
[Download RAW message or body]

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>
---
 drivers/net/wireless/mediatek/mt76/mac80211.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mac80211.c \
b/drivers/net/wireless/mediatek/mt76/mac80211.c index 639cbafc1d50..2a699e8b79bf \
                100644
--- a/drivers/net/wireless/mediatek/mt76/mac80211.c
+++ b/drivers/net/wireless/mediatek/mt76/mac80211.c
@@ -550,6 +550,12 @@ 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;
 
-- 
2.17.0


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