From 542f17edfc0b9e73aaae67e373402c7d249f0c85 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Sat, 29 Sep 2018 13:13:09 +0200
Subject: [PATCH] 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>
---
 mac80211.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/mac80211.c b/mac80211.c
index 639cbafc..2a699e8b 100644
--- a/mac80211.c
+++ b/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;