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[NET_SCHED]: Fix endless loops (part 2): "simple" qdiscs

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Convert the "simple" qdiscs to use qdisc_tree_decrease_qlen() where
necessary:

- all graft operations
- destruction of old child qdiscs in prio, red and tbf change operation
- purging of queue in sfq change operation

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy
2006-11-29 17:36:20 -08:00
committed by David S. Miller
parent 43effa1e57
commit 5e50da01d0
7 changed files with 22 additions and 10 deletions
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6
net/sched/sch_red.c
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@@ -229,8 +229,10 @@ static int red_change(struct Qdisc *sch, struct rtattr *opt)
sch_tree_lock(sch);
q->flags = ctl->flags;
q->limit = ctl->limit;
if (child)
if (child) {
qdisc_tree_decrease_qlen(q->qdisc, q->qdisc->q.qlen);
qdisc_destroy(xchg(&q->qdisc, child));
}
red_set_parms(&q->parms, ctl->qth_min, ctl->qth_max, ctl->Wlog,
ctl->Plog, ctl->Scell_log,
@@ -308,8 +310,8 @@ static int red_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new,
sch_tree_lock(sch);
*old = xchg(&q->qdisc, new);
qdisc_tree_decrease_qlen(*old, (*old)->q.qlen);
qdisc_reset(*old);
sch->q.qlen = 0;
sch_tree_unlock(sch);
return 0;
}