static unsigned int tbf_drop(struct Qdisc* sch)
{
struct tbf_sched_data *q = qdisc_priv(sch);
- unsigned int len;
+ unsigned int len = 0;
- if ((len = q->qdisc->ops->drop(q->qdisc)) != 0) {
+ if (q->qdisc->ops->drop && (len = q->qdisc->ops->drop(q->qdisc)) != 0) {
sch->q.qlen--;
sch->qstats.drops++;
}
if (max_size < 0)
goto done;
- if (q->qdisc == &noop_qdisc) {
+ if (qopt->limit > 0) {
if ((child = tbf_create_dflt_qdisc(sch->dev, qopt->limit)) == NULL)
goto done;
}
sch_tree_lock(sch);
- if (child) q->qdisc = child;
+ if (child)
+ qdisc_destroy(xchg(&q->qdisc, child));
q->limit = qopt->limit;
q->mtu = qopt->mtu;
q->max_size = max_size;