From: Lennert Buytenhek <buytenh@marvell.com>
Date: Mon, 5 Jan 2009 08:00:12 +0000 (-0800)
Subject: tcp: don't mask EOF and socket errors on nonblocking splice receive
X-Git-Tag: v2.6.29-rc1~502^2~14
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4f7d54f59bc470f0aaa932f747a95232d7ebf8b1;p=karo-tx-linux.git

tcp: don't mask EOF and socket errors on nonblocking splice receive

Currently, setting SPLICE_F_NONBLOCK on splice from a TCP socket
results in masking of EOF (RDHUP) and error conditions on the socket
by an -EAGAIN return.  Move the NONBLOCK check in tcp_splice_read()
to be after the EOF and error checks to fix this.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 4d655e945413..bce1b068f2a7 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -580,10 +580,6 @@ ssize_t tcp_splice_read(struct socket *sock, loff_t *ppos,
 		else if (!ret) {
 			if (spliced)
 				break;
-			if (flags & SPLICE_F_NONBLOCK) {
-				ret = -EAGAIN;
-				break;
-			}
 			if (sock_flag(sk, SOCK_DONE))
 				break;
 			if (sk->sk_err) {
@@ -601,6 +597,10 @@ ssize_t tcp_splice_read(struct socket *sock, loff_t *ppos,
 					ret = -ENOTCONN;
 				break;
 			}
+			if (flags & SPLICE_F_NONBLOCK) {
+				ret = -EAGAIN;
+				break;
+			}
 			if (!timeo) {
 				ret = -EAGAIN;
 				break;