netdev - [PATCH net-next] tcp:elapsed variable calculated twice while keepalive working

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Date:	Tue,  6 Aug 2013 20:05:24 +0800
From:	Tingwei Liu <tingw.liu@...il.com>
To:	netdev@...r.kernel.org, kuznet@....inr.ac.ru, davem@...emloft.net
Cc:	Tingwei Liu <tingw.liu@...il.com>
Subject: [PATCH net-next] tcp:elapsed variable calculated twice while keepalive working

---
 net/ipv4/tcp_timer.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 4b85e6f..03091d9 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -591,11 +591,11 @@ static void tcp_keepalive_timer (unsigned long data)
 	if (!sock_flag(sk, SOCK_KEEPOPEN) || sk->sk_state == TCP_CLOSE)
 		goto out;
 
-	elapsed = keepalive_time_when(tp);
-
 	/* It is alive without keepalive 8) */
-	if (tp->packets_out || tcp_send_head(sk))
+	if (tp->packets_out || tcp_send_head(sk)) {
+		elapsed = keepalive_time_when(tp);
 		goto resched;
+	}
 
 	elapsed = keepalive_time_elapsed(tp);
 
-- 
1.6.0.2

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