ieee802154: free skb buffer if dev isn't running

Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>

net/ieee802154/af_ieee802154.c

@@ -302,7 +302,7 @@ static int ieee802154_rcv(struct sk_buff *skb, struct net_device *dev,
 	struct packet_type *pt, struct net_device *orig_dev)
 {
 	if (!netif_running(dev))
-		return -ENODEV;
+		goto drop;
 	pr_debug("got frame, type %d, dev %p\n", dev->type, dev);
 #ifdef DEBUG
 	print_hex_dump_bytes("ieee802154_rcv ", DUMP_PREFIX_NONE, skb->data, skb->len);