- err = nla_parse_nested_compat(tb, TCA_PRIO_MAX, opt, NULL, qopt,
- sizeof(*qopt));
- if (err < 0)
- return err;
-
- q->bands = qopt->bands;
- /* If we're multiqueue, make sure the number of incoming bands
- * matches the number of queues on the device we're associating with.
- * If the number of bands requested is zero, then set q->bands to
- * dev->egress_subqueue_count. Also, the root qdisc must be the
- * only one that is enabled for multiqueue, since it's the only one
- * that interacts with the underlying device.
- */
- q->mq = nla_get_flag(tb[TCA_PRIO_MQ]);
- if (q->mq) {
- if (sch->parent != TC_H_ROOT)
- return -EINVAL;
- if (netif_is_multiqueue(sch->dev)) {
- if (q->bands == 0)
- q->bands = sch->dev->egress_subqueue_count;
- else if (q->bands != sch->dev->egress_subqueue_count)
- return -EINVAL;
- } else
- return -EOPNOTSUPP;
- }