[PATCH] ieee80211: division by zero fix

This fixes division by zero bug in ieee80211_wx_get_scan().
Signed-off-by: NJiri Benc <jbenc@suse.cz>
Signed-off-by: NJeff Garzik <jgarzik@pobox.com>

net/ieee80211/ieee80211_wx.c

@@ -152,6 +152,9 @@ static inline char *ipw2100_translate_scan(struct ieee80211_device *ieee,
 		iwe.u.qual.level = 0;
 	} else {
 		iwe.u.qual.level = network->stats.rssi;
+		if (ieee->perfect_rssi == ieee->worst_rssi)
+			iwe.u.qual.qual = 100;
+		else
 			iwe.u.qual.qual =
 			    (100 *
 			     (ieee->perfect_rssi - ieee->worst_rssi) *