vsock: Simplify '__vsock_release()'

Use 'skb_queue_purge()' instead of re-implementing it.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/vmw_vsock/af_vsock.c

@@ -641,7 +641,6 @@ EXPORT_SYMBOL_GPL(__vsock_create);
 static void __vsock_release(struct sock *sk, int level)
 {
 	if (sk) {
-		struct sk_buff *skb;
 		struct sock *pending;
 		struct vsock_sock *vsk;
 
@@ -662,8 +661,7 @@ static void __vsock_release(struct sock *sk, int level)
 		sock_orphan(sk);
 		sk->sk_shutdown = SHUTDOWN_MASK;
 
-		while ((skb = skb_dequeue(&sk->sk_receive_queue)))
-			kfree_skb(skb);
+		skb_queue_purge(&sk->sk_receive_queue);
 
 		/* Clean up any sockets that never were accepted. */
 		while ((pending = vsock_dequeue_accept(sk)) != NULL) {