[TCP]: Optimize check in port-allocation code.

Signed-off-by: Folkert van Heusden <folkert@vanheusden.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 2 deletions

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 3ac6659869c4..dad98e4a5043 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -222,10 +222,13 @@ static int tcp_v4_get_port(struct sock *sk, unsigned short snum)
                 int rover;
 
                 spin_lock(&tcp_portalloc_lock);
-                rover = tcp_port_rover;
+                if (tcp_port_rover < low)
+                        rover = low;
+                else
+                        rover = tcp_port_rover;
                 do {
                         rover++;
-                        if (rover < low || rover > high)
+                        if (rover > high)
                                 rover = low;
                         head = &tcp_bhash[tcp_bhashfn(rover)];
                         spin_lock(&head->lock);