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   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Tue, 13 Nov 2018 20:29:03 +0100
   3 Subject: [PATCH] mac80211: ignore tx status for PS stations in
   4  ieee80211_tx_status_ext
   5
   6 Make it behave like regular ieee80211_tx_status calls, except for the lack of
   7 filtered frame processing.
   8 This fixes spurious low-ack triggered disconnections with powersave clients
   9 connected to an AP.
  10
  11 Fixes: f027c2aca0cf4 ("mac80211: add ieee80211_tx_status_noskb")
  12 Cc: stable@vger.kernel.org
  13 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  14 ---
  15
  16 --- a/net/mac80211/status.c
  17 +++ b/net/mac80211/status.c
  18 @@ -987,6 +987,8 @@ void ieee80211_tx_status_ext(struct ieee
  19                         /* Track when last TDLS packet was ACKed */
  20                         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
  21                                 sta->status_stats.last_tdls_pkt_time = jiffies;
  22 +               } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
  23 +                       return;
  24                 } else {
  25                         ieee80211_lost_packet(sta, info);
  26                 }