From: Felix Fietkau <nbd@nbd.name>
Date: Sat, 29 Sep 2018 11:13:09 +0000 (+0200)
Subject: mt76: fix handling ps-poll frames
X-Git-Tag: v4.20-rc1~27^2~143^2~23^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=36d910960fae3f9e74bedf3e0ef39ee26bdaa51f;p=thirdparty%2Flinux.git

mt76: fix handling ps-poll frames

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>
---

diff --git a/drivers/net/wireless/mediatek/mt76/mac80211.c b/drivers/net/wireless/mediatek/mt76/mac80211.c
index 639cbafc1d506..2a699e8b79bfb 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;