From: David S. Miller <davem@davemloft.net>
Date: Thu, 19 Jul 2012 15:46:59 +0000 (-0700)
Subject: ipv4: Fix time difference calculation in rt_bind_exception().
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=7fed84f622ec2696087301199c2952b85e0cc3b4;p=~shefty%2Frdma-dev.git

ipv4: Fix time difference calculation in rt_bind_exception().

Reported-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index f67e7023672..2c25581bf25 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1907,7 +1907,7 @@ static void rt_bind_exception(struct rtable *rt, struct fib_nh *nh, __be32 daddr
 		if (fnhe->fnhe_daddr == daddr) {
 			if (fnhe->fnhe_pmtu) {
 				unsigned long expires = fnhe->fnhe_expires;
-				unsigned long diff = jiffies - expires;
+				unsigned long diff = expires - jiffies;
 
 				if (time_before(jiffies, expires)) {
 					rt->rt_pmtu = fnhe->fnhe_pmtu;