[TCP]: Put Alexey's -EAGAIN change back in with Linus's fix on top.

net/ipv4/tcp.c

@@ -1536,19 +1536,14 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 		struct sk_buff *skb;
 		u32 offset;
 
-		/* Are we at urgent data? Stop if we have read anything. */
-		if (copied && tp->urg_data && tp->urg_seq == *seq)
-			break;
-
-		/* We need to check signals first, to get correct SIGURG
-		 * handling. FIXME: Need to check this doesn't impact 1003.1g
-		 * and move it down to the bottom of the loop
-		 */
-		if (signal_pending(current)) {
+		/* Are we at urgent data? Stop if we have read anything or have SIGURG pending. */
+		if (tp->urg_data && tp->urg_seq == *seq) {
 			if (copied)
 				break;
-			copied = timeo ? sock_intr_errno(timeo) : -EAGAIN;
-			break;
+			if (signal_pending(current)) {
+				copied = timeo ? sock_intr_errno(timeo) : -EAGAIN;
+				break;
+			}
 		}
 
 		/* Next get a buffer. */
@@ -1587,6 +1582,7 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 			    sk->sk_state == TCP_CLOSE ||
 			    (sk->sk_shutdown & RCV_SHUTDOWN) ||
 			    !timeo ||
+			    signal_pending(current) ||
 			    (flags & MSG_PEEK))
 				break;
 		} else {
@@ -1616,6 +1612,11 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 				copied = -EAGAIN;
 				break;
 			}
+
+			if (signal_pending(current)) {
+				copied = sock_intr_errno(timeo);
+				break;
+			}
 		}
 
 		cleanup_rbuf(sk, copied);