mac80211: fix warning in ieee80211_probe_client

The warning is spurious -- if !sta we always exit without using the
unassigned qos variable, and if we do find the sta we assign it.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/cfg.c

@@ -2570,12 +2570,13 @@ static int ieee80211_probe_client(struct wiphy *wiphy, struct net_device *dev,
 
 	rcu_read_lock();
 	sta = sta_info_get(sdata, peer);
-	if (sta)
+	if (sta) {
 		qos = test_sta_flag(sta, WLAN_STA_WME);
-	rcu_read_unlock();
-
-	if (!sta)
+		rcu_read_unlock();
+	} else {
+		rcu_read_unlock();
 		return -ENOLINK;
+	}
 
 	if (qos) {
 		fc = cpu_to_le16(IEEE80211_FTYPE_DATA |