[ATM]: use RCV_SHUTDOWN to exit skb_recv_datagram()

Signed-off-by: David S. Miller <davem@davemloft.net>

net/atm/common.c

@@ -178,6 +178,7 @@ static void vcc_destroy_socket(struct sock *sk)
 	struct atm_vcc *vcc = atm_sk(sk);
 	struct sk_buff *skb;
 
+	set_bit(ATM_VF_CLOSE, &vcc->flags);
 	clear_bit(ATM_VF_READY, &vcc->flags);
 	if (vcc->dev) {
 		if (vcc->dev->ops->close)
@@ -216,6 +217,7 @@ int vcc_release(struct socket *sock)
 void vcc_release_async(struct atm_vcc *vcc, int reply)
 {
 	set_bit(ATM_VF_CLOSE, &vcc->flags);
+	vcc->sk->sk_shutdown |= RCV_SHUTDOWN;
 	vcc->sk->sk_err = -reply;
 	clear_bit(ATM_VF_WAITING, &vcc->flags);
 	vcc->sk->sk_state_change(vcc->sk);

net/atm/signaling.c

@@ -147,9 +147,7 @@ static int sigd_send(struct atm_vcc *vcc,struct sk_buff *skb)
 			return 0;
 		case as_close:
 			set_bit(ATM_VF_RELEASED,&vcc->flags);
-			clear_bit(ATM_VF_READY,&vcc->flags);
-			vcc->sk->sk_err = -msg->reply;
-			clear_bit(ATM_VF_WAITING, &vcc->flags);
+			vcc_release_async(vcc, msg->reply);
 			break;
 		case as_modify:
 			modify_qos(vcc,msg);
@@ -205,9 +203,7 @@ static void purge_vcc(struct atm_vcc *vcc)
 	if (vcc->sk->sk_family == PF_ATMSVC &&
 	    !test_bit(ATM_VF_META,&vcc->flags)) {
 		set_bit(ATM_VF_RELEASED,&vcc->flags);
-		vcc->sk->sk_err = EUNATCH;
-		clear_bit(ATM_VF_WAITING, &vcc->flags);
-		vcc->sk->sk_state_change(vcc->sk);
+		vcc_release_async(vcc, -EUNATCH);
 	}
 }