From: Johannes Berg <johannes.berg@intel.com>
Date: Tue, 8 May 2012 19:36:20 +0000 (+0200)
Subject: cfg80211: add warning when calculating MCS rates >= 32
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2615f3759b7b7d47a2fa894bc9f45286bdf122d7;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

cfg80211: add warning when calculating MCS rates >= 32

cfg80211_calculate_bitrate() doesn't work for MCS
rates 32 or higher, and it has always returned 0
in that case. Warn if it ever really happens.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/wireless/util.c b/net/wireless/util.c
index 6cba00173a2f..177df03064cf 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -880,7 +880,7 @@ u16 cfg80211_calculate_bitrate(struct rate_info *rate)
 		return rate->legacy;
 
 	/* the formula below does only work for MCS values smaller than 32 */
-	if (rate->mcs >= 32)
+	if (WARN_ON_ONCE(rate->mcs >= 32))
 		return 0;
 
 	modulation = rate->mcs & 7;