From a2c8b04a583c6bcc30a1efb2c33ffd136f8f38da Mon Sep 17 00:00:00 2001
From: Naftali Goldstein <naftali.goldstein@intel.com>
Date: Tue, 11 Jul 2017 10:07:32 +0300
Subject: [PATCH 144/146] iwlwifi: mvm: send delba upon rx ba session timeout
Git-commit: 20fc690f38d17b8f961101a477a9aa0841fb6e20
Patch-mainline: v4.13-rc6
References: FATE#322675

When an RX block-ack session times out, the firmware, which offloads
RX reordering but not the BA session negotiation, stops the session
but doesn't send a DELBA.  This causes the the session to remain
active in the remote device, so no more BA sessions will be
established, causing a severe throughput degradation due to the lack
of aggregation.

Use the new ieee80211_rx_ba_timer_expired API when the ba session timer
expires, since this will tear down the ba session and also send a delba.

The previous API used is intended for drivers that offload the
addba/delba negotiation, but not the rx reordering, while our driver
does the opposite.

This patch depends on "mac80211: add api to start ba session timer
expired flow".

Signed-off-by: Naftali Goldstein <naftali.goldstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/sta.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
@@ -291,8 +291,8 @@ static void iwl_mvm_rx_agg_session_expir
 		goto unlock;
 
 	mvm_sta = iwl_mvm_sta_from_mac80211(sta);
-	ieee80211_stop_rx_ba_session_offl(mvm_sta->vif,
-					  sta->addr, ba_data->tid);
+	ieee80211_rx_ba_timer_expired(mvm_sta->vif,
+				      sta->addr, ba_data->tid);
 unlock:
 	rcu_read_unlock();
 }