tcp: Kill extraneous SPLICE_F_NONBLOCK checks.

In splice TCP receive, the SPLICE_F_NONBLOCK flag is used
to compute the "timeo" value.  So checking it again inside
of the main receive loop to trigger -EAGAIN processing is
entirely unnecessary.

Noticed by Jarek P. and Lennert Buytenhek.

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

1 files changed, 0 insertions, 4 deletions

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index bce1b068f2a7..35bcddf8a932 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -597,10 +597,6 @@ 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;