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net_sched: always reset qdisc backlog in qdisc_reset()

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[ Upstream commit c8e1812960eeae42e2183154927028511c4bc566 ]

SKB stored in qdisc->gso_skb also counted into backlog.

Some qdiscs don't reset backlog to zero in ->reset(),
for example sfq just dequeue and free all queued skb.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Fixes: 2ccccf5fb43f ("net_sched: update hierarchical backlog too")
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Konstantin Khlebnikov 2017-09-20 15:45:36 +03:00 committed by Greg Kroah-Hartman
parent 93eef2172d
commit 5600c7586a
1 changed files with 1 additions and 0 deletions
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net/sched/sch_generic.c
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@ -681,6 +681,7 @@ void qdisc_reset(struct Qdisc *qdisc)
qdisc->gso_skb = NULL;
}
qdisc->q.qlen = 0;
qdisc->qstats.backlog = 0;
}
EXPORT_SYMBOL(qdisc_reset);