b43legacy: Fix rfkill allocation leakage in error paths

We must kill rfkill in any error paths that trigger after rfkill init.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Acked-by: Stefano Brivio <stefano.brivio@polimi.it>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/wireless/b43legacy/main.c

@@ -3221,6 +3221,7 @@ static int b43legacy_op_start(struct ieee80211_hw *hw)
 	struct b43legacy_wldev *dev = wl->current_dev;
 	int did_init = 0;
 	int err = 0;
+	bool do_rfkill_exit = 0;
 
 	/* First register RFkill.
 	 * LEDs that are registered later depend on it. */
@@ -3230,8 +3231,10 @@ static int b43legacy_op_start(struct ieee80211_hw *hw)
 
 	if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
 		err = b43legacy_wireless_core_init(dev);
-		if (err)
+		if (err) {
+			do_rfkill_exit = 1;
 			goto out_mutex_unlock;
+		}
 		did_init = 1;
 	}
 
@@ -3240,6 +3243,7 @@ static int b43legacy_op_start(struct ieee80211_hw *hw)
 		if (err) {
 			if (did_init)
 				b43legacy_wireless_core_exit(dev);
+			do_rfkill_exit = 1;
 			goto out_mutex_unlock;
 		}
 	}
@@ -3247,6 +3251,9 @@ static int b43legacy_op_start(struct ieee80211_hw *hw)
 out_mutex_unlock:
 	mutex_unlock(&wl->mutex);
 
+	if (do_rfkill_exit)
+		b43legacy_rfkill_exit(dev);
+
 	return err;
 }