From 31d0bac1e8db36df65ff97533c5925ee970b80cc Mon Sep 17 00:00:00 2001
From: Gregory Greenman <gregory.greenman@intel.com>
Date: Thu, 6 Jul 2017 05:07:33 +0300
Subject: [PATCH 135/146] iwlwifi: mvm: set A-MPDU bit upon empty BA
 notification from FW
Git-commit: 9465c3f8ba67cff697c0529de5a03cc5e1509d41
Patch-mainline: v4.13-rc6
References: FATE#322675

The bit was set only if there was at least one reclaimed frame in an
aggregation. It's important to set it also in the case that the whole
A-MPDU was lost, otherwise rate scaling statistics will not be
updated correctly. Thus, set it always in ba notification handler.

This fixes a throughput degradation of about 20% in certain scenarios
with multiple streams on 11ac.

Signed-off-by: Gregory Greenman <gregory.greenman@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/tx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
index e5d3eba2e82a..5fcc9dd6be56 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
@@ -1821,6 +1821,8 @@ void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
 	struct iwl_mvm_tid_data *tid_data;
 	struct iwl_mvm_sta *mvmsta;
 
+	ba_info.flags = IEEE80211_TX_STAT_AMPDU;
+
 	if (iwl_mvm_has_new_tx_api(mvm)) {
 		struct iwl_mvm_compressed_ba_notif *ba_res =
 			(void *)pkt->data;
-- 
2.12.3