From 1a19c139be18ed4d6d681049cc48586fae070120 Mon Sep 17 00:00:00 2001
From: Sara Sharon <sara.sharon@intel.com>
Date: Tue, 1 May 2018 15:12:08 +0300
Subject: [PATCH] iwlwifi: mvm: avoid sending too many BARs
Git-commit: 1a19c139be18ed4d6d681049cc48586fae070120
Patch-mainline: v4.20-rc1
References: bsc#1051510
When we receive TX response, we may release a few packets
due to a hole that was closed in the transmission window.
However, if that frame failed, we will mark all the released
frames as failed and will send multiple BARs.
This affects statistics badly, and cause unnecessary frames
transmission.
Instead, mark all the following packets as success, with the
desired result of sending a bar for the failed frame only.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/wireless/intel/iwlwifi/mvm/tx.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
index 31a81a4c6e78..b33b8357a8f7 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
@@ -1510,6 +1510,14 @@ static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
break;
}
+ /*
+ * If we are freeing multiple frames, mark all the frames
+ * but the first one as acked, since they were acknowledged
+ * before
+ * */
+ if (skb_freed > 1)
+ info->flags |= IEEE80211_TX_STAT_ACK;
+
iwl_mvm_tx_status_check_trigger(mvm, status);
info->status.rates[0].count = tx_resp->failure_frame + 1;
--
2.16.4