[PATCH 4.19 115/118] mac80211: ignore tx status for PS stations in ieee80211_tx_status_ext

[Greg Kroah-Hartman]

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Felix Fietkau <n...@nbd.name>

commit a317e65face482371de30246b6494feb093ff7f9 upstream.

Make it behave like regular ieee80211_tx_status calls, except for the lack of
filtered frame processing.
This fixes spurious low-ack triggered disconnections with powersave clients
connected to an AP.

Fixes: f027c2aca0cf4 ("mac80211: add ieee80211_tx_status_noskb")
Cc: sta...@vger.kernel.org
Signed-off-by: Felix Fietkau <n...@nbd.name>
Signed-off-by: Johannes Berg <johannes.b...@intel.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 net/mac80211/status.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -964,6 +964,8 @@ void ieee80211_tx_status_ext(struct ieee
                        /* Track when last TDLS packet was ACKed */
                        if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
                                sta->status_stats.last_tdls_pkt_time = jiffies;
+               } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
+                       return;
                } else {
                        ieee80211_lost_packet(sta, info);
                }