[NET_SCHED]: Fix endless loops (part 2): "simple" qdiscs
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>
diff --git a/net/sched/sch_red.c b/net/sched/sch_red.c
index ee66c5c..acddad0 100644
--- a/net/sched/sch_red.c
+++ b/net/sched/sch_red.c
@@ -229,8 +229,10 @@
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 @@
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;
}