From 598b990bb1f1f6026dc35e7d6ca69e4cf30e52f4 Mon Sep 17 00:00:00 2001
From: stephen hemminger <stephen@networkplumber.org>
Date: Sun, 6 Oct 2013 15:15:33 -0700
Subject: [PATCH] netem: update backlog after drop
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[ Upstream commit 638a52b801e40ed276ceb69b73579ad99365361a ]

When packet is dropped from rb-tree netem the backlog statistic should
also be updated.

Reported-by: Сергеев Сергей <adron@yapic.net>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/sched/sch_netem.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index 82f6016d89aba..7dc79940f2401 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -523,6 +523,7 @@ static unsigned int netem_drop(struct Qdisc *sch)
 			skb->next = NULL;
 			skb->prev = NULL;
 			len = qdisc_pkt_len(skb);
+			sch->qstats.backlog -= len;
 			kfree_skb(skb);
 		}
 	}
-- 
2.47.2