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From: Felix Fietkau <nbd@openwrt.org>
Date: Thu, 24 Sep 2015 14:11:40 +0200
Subject: [PATCH] mac80211: fix handling of PS filtering with fast-xmit
Fixes dropped packets in the tx path in case a non-PS station triggers
the tx filter.
Cc: stable@vger.kernel.org # 4.2
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
---
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -101,6 +101,7 @@ static void ieee80211_handle_filtered_fr
* when it wakes up for the next time.
*/
set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT);
+ ieee80211_clear_fast_xmit(sta);
/*
* This code races in the following way:
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1217,8 +1217,10 @@ ieee80211_tx_prepare(struct ieee80211_su
if (!tx->sta)
info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
- else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT))
+ else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
+ ieee80211_check_fast_xmit(tx->sta);
+ }
info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
@@ -2450,7 +2452,8 @@ void ieee80211_check_fast_xmit(struct st
if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
- test_sta_flag(sta, WLAN_STA_PS_DELIVER))
+ test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
+ test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
goto out;
if (sdata->noack_map)
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