netdev - [PATCH] netem: fix unwanted reordering

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Message-ID: <1329371375.5646.6.camel@edumazet-laptop>
Date:	Thu, 16 Feb 2012 06:49:35 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev <netdev@...r.kernel.org>
Subject: [PATCH] netem: fix unwanted reordering

commit 50612537e9 (netem: fix classful handling) added in typo in
netem_dequeue() :

After checking skb at the head of tfifo queue for time constraints, it
dequeues tail skb, thus adding unwanted reordering.

Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
---
 net/sched/sch_netem.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index e83d61c..1db8ff0 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -501,7 +501,7 @@ tfifo_dequeue:
 
 		/* if more time remaining? */
 		if (cb->time_to_send <= psched_get_time()) {
-			skb = qdisc_dequeue_tail(sch);
+			skb = qdisc_dequeue_head(sch);
 			if (unlikely(!skb))
 				goto qdisc_dequeue;
 


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