svc: Move close processing to a single place

Close handling was duplicated in the UDP and TCP recvfrom
methods. This code has been moved to the transport independent
svc_recv function.
Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Acked-by: Neil Brown <neilb@suse.de>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Greg Banks <gnb@sgi.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

net/sunrpc/svcsock.c

@@ -776,11 +776,6 @@ svc_udp_recvfrom(struct svc_rqst *rqstp)
 		return svc_deferred_recv(rqstp);
 	}
 
-	if (test_bit(SK_CLOSE, &svsk->sk_flags)) {
-		svc_delete_socket(svsk);
-		return 0;
-	}
-
 	clear_bit(SK_DATA, &svsk->sk_flags);
 	skb = NULL;
 	err = kernel_recvmsg(svsk->sk_sock, &msg, NULL,
@@ -1181,11 +1176,6 @@ svc_tcp_recvfrom(struct svc_rqst *rqstp)
 		return svc_deferred_recv(rqstp);
 	}
 
-	if (test_bit(SK_CLOSE, &svsk->sk_flags)) {
-		svc_delete_socket(svsk);
-		return 0;
-	}
-
 	if (svsk->sk_sk->sk_state == TCP_LISTEN) {
 		svc_tcp_accept(svsk);
 		svc_sock_received(svsk);
@@ -1311,7 +1301,7 @@ svc_tcp_recvfrom(struct svc_rqst *rqstp)
 	return len;
 
  err_delete:
-	svc_delete_socket(svsk);
+	set_bit(SK_CLOSE, &svsk->sk_flags);
 	return -EAGAIN;
 
  error:
@@ -1575,10 +1565,16 @@ svc_recv(struct svc_rqst *rqstp, long timeout)
 	}
 	spin_unlock_bh(&pool->sp_lock);
 
-	dprintk("svc: server %p, pool %u, socket %p, inuse=%d\n",
-		 rqstp, pool->sp_id, svsk, atomic_read(&svsk->sk_inuse));
-	len = svsk->sk_xprt.xpt_ops->xpo_recvfrom(rqstp);
-	dprintk("svc: got len=%d\n", len);
+	len = 0;
+	if (test_bit(SK_CLOSE, &svsk->sk_flags)) {
+		dprintk("svc_recv: found SK_CLOSE\n");
+		svc_delete_socket(svsk);
+	} else {
+		dprintk("svc: server %p, pool %u, socket %p, inuse=%d\n",
+			rqstp, pool->sp_id, svsk, atomic_read(&svsk->sk_inuse));
+		len = svsk->sk_xprt.xpt_ops->xpo_recvfrom(rqstp);
+		dprintk("svc: got len=%d\n", len);
+	}
 
 	/* No data, incomplete (TCP) read, or accept() */
 	if (len == 0 || len == -EAGAIN) {