linux-kernel - [PATCH 3.12 42/58] mac80211: minstrel_ht: set default tx aggregation timeout to 0

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Message-Id: <5b2e8b9586c2e11f95f5bdd5783259941d17c0f3.1458125909.git.jslaby@suse.cz>
Date:	Wed, 16 Mar 2016 11:59:27 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Felix Fietkau <nbd@...nwrt.org>,
	Johannes Berg <johannes.berg@...el.com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 42/58] mac80211: minstrel_ht: set default tx aggregation timeout to 0

From: Felix Fietkau <nbd@...nwrt.org>

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

===============

commit 7a36b930e6ed4702c866dc74a5ad07318a57c688 upstream.

The value 5000 was put here with the addition of the timeout field to
ieee80211_start_tx_ba_session. It was originally added in mac80211 to
save resources for drivers like iwlwifi, which only supports a limited
number of concurrent aggregation sessions.

Since iwlwifi does not use minstrel_ht and other drivers don't need
this, 0 is a better default - especially since there have been
recent reports of aggregation setup related issues reproduced with
ath9k. This should improve stability without causing any adverse
effects.

Acked-by: Avery Pennarun <apenwarr@...il.com>
Signed-off-by: Felix Fietkau <nbd@...nwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 net/mac80211/rc80211_minstrel_ht.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index 7c323f27ba23..96b6dc0155de 100644
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -454,7 +454,7 @@ minstrel_aggr_check(struct ieee80211_sta *pubsta, struct sk_buff *skb)
 	if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO)
 		return;

-	ieee80211_start_tx_ba_session(pubsta, tid, 5000);
+	ieee80211_start_tx_ba_session(pubsta, tid, 0);
 }

 static void
-- 
2.7.3