From: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Date: Sat, 24 Sep 2011 16:48:26 +0000 (+0200)
Subject: mac80211: max_tp_rate2 management of minstrel_ht
X-Git-Tag: v3.2-rc1~129^2~83^2~166
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=89888e368eebb8d5c3dbf58425b95fc773aee511;p=profile%2Fivi%2Fkernel-adaptation-intel-automotive.git

mac80211: max_tp_rate2 management of minstrel_ht

I noticed a possible issue in the max_tp_rate2 management of
minstrel_ht. In particular, if we look up just among max_tp_rate2 of
each group it will be possible that the selected rate will not be the
mcs with second maximum throughput. I wrote this simple patch.

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index e19249b..cdb2853 100644
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -281,6 +281,8 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
 
 		mr = minstrel_get_ratestats(mi, mg->max_tp_rate);
 		if (cur_tp < mr->cur_tp) {
+			mi->max_tp_rate2 = mi->max_tp_rate;
+			cur_tp2 = cur_tp;
 			mi->max_tp_rate = mg->max_tp_rate;
 			cur_tp = mr->cur_tp;
 		}