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etf: Cancel timer if there are no pending skbs 

There is no point in firing the qdisc watchdog if there are no future
skbs pending in the queue and the watchdog had been set previously.

Signed-off-by: Jesus Sanchez-Palencia <jesus.s.palencia@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jesus Sanchez-Palencia 2018-11-14 17:26:32 -08:00 committed by David S. Miller
parent 213d7767af
commit 3fcbdaee3b
1 changed files with 3 additions and 1 deletions
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4
net/sched/sch_etf.c
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@ -117,8 +117,10 @@ static void reset_watchdog(struct Qdisc *sch)
struct sk_buff *skb = etf_peek_timesortedlist(sch);
ktime_t next;
if (!skb)
if (!skb) {
qdisc_watchdog_cancel(&q->watchdog);
return;
}
next = ktime_sub_ns(skb->tstamp, q->delta);
qdisc_watchdog_schedule_ns(&q->watchdog, ktime_to_ns(next));