From d71aaf6053e380996e40c9ecfe39a8dced52694c Mon Sep 17 00:00:00 2001
From: "Luis R. Rodriguez" <lrodriguez@atheros.com>
Date: Thu, 30 Oct 2008 13:33:52 -0700
Subject: cfg80211: a reg rule is invalid if freq diff is 0

A regulatory rule is invalid when the frequency difference
between the end of the frequency range and the start is 0.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
 net/wireless/reg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 8e5d239..34983a8 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -321,7 +321,7 @@ static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
 
 	freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
 
-	if (freq_range->max_bandwidth_khz > freq_diff)
+	if (freq_diff <= 0 || freq_range->max_bandwidth_khz > freq_diff)
 		return false;
 
 	return true;
-- 
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