From: Folkert van Heusden <folkert@vanheusden.com>
Date: Tue, 3 May 2005 21:36:08 +0000 (-0700)
Subject: [TCP]: Optimize check in port-allocation code.
X-Git-Tag: firefly_0821_release~42725^2~60^2~16
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=0b2531bdc54e19717de5cb161d57e5ee0a7725ff;p=firefly-linux-kernel-4.4.55.git

[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>
---

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);