From: Arnd Hannemann <hannemann@nets.rwth-aachen.de>
Date: Mon, 24 Aug 2009 18:51:46 +0000 (+0200)
Subject: mac80211: Fix output of minstrels rc_stats
X-Git-Tag: v2.6.32-rc1~703^2~275^2~56
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=eadac6bf95e1945bb64e6f8f22d8509391645e2e;p=linux.git

mac80211: Fix output of minstrels rc_stats

An integer overflow in the minstrel debug code prevented the
throughput to be displayed correctly. This patch fixes that,
by permutating operations like proposed by Pavel Roskin.

Signed-off-by: Arnd Hannemann <hannemann@nets.rwth-aachen.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/mac80211/rc80211_minstrel_debugfs.c b/net/mac80211/rc80211_minstrel_debugfs.c
index 98f480708050..3d72ec5730d4 100644
--- a/net/mac80211/rc80211_minstrel_debugfs.c
+++ b/net/mac80211/rc80211_minstrel_debugfs.c
@@ -83,7 +83,7 @@ minstrel_stats_open(struct inode *inode, struct file *file)
 		p += sprintf(p, "%3u%s", mr->bitrate / 2,
 				(mr->bitrate & 1 ? ".5" : "  "));
 
-		tp = ((mr->cur_tp * 96) / 18000) >> 10;
+		tp = mr->cur_tp / ((18000 << 10) / 96);
 		prob = mr->cur_prob / 18;
 		eprob = mr->probability / 18;