[TCP]: Optimize check in port-allocation code, v6 version.

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/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 4760c85e19db..0f69e800a0ad 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -139,9 +139,12 @@ static int tcp_v6_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);