3 files changed, 17 insertions, 9 deletions

diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index cd81505..547b4a8 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -271,11 +271,12 @@ static struct Qdisc *qdisc_match_from_root(struct Qdisc *root, u32 handle)
 	return NULL;
 }
 
-static void qdisc_list_add(struct Qdisc *q)
+void qdisc_list_add(struct Qdisc *q)
 {
 	if ((q->parent != TC_H_ROOT) && !(q->flags & TCQ_F_INGRESS))
 		list_add_tail(&q->list, &qdisc_dev(q)->qdisc->list);
 }
+EXPORT_SYMBOL(qdisc_list_add);
 
 void qdisc_list_del(struct Qdisc *q)
 {
diff --git a/net/sched/sch_mq.c b/net/sched/sch_mq.c
index 2e56185..a8b2864 100644
--- a/net/sched/sch_mq.c
+++ b/net/sched/sch_mq.c
@@ -78,14 +78,19 @@ static void mq_attach(struct Qdisc *sch)
 {
 	struct net_device *dev = qdisc_dev(sch);
 	struct mq_sched *priv = qdisc_priv(sch);
-	struct Qdisc *qdisc;
+	struct Qdisc *qdisc, *old;
 	unsigned int ntx;
 
 	for (ntx = 0; ntx < dev->num_tx_queues; ntx++) {
 		qdisc = priv->qdiscs[ntx];
-		qdisc = dev_graft_qdisc(qdisc->dev_queue, qdisc);
-		if (qdisc)
-			qdisc_destroy(qdisc);
+		old = dev_graft_qdisc(qdisc->dev_queue, qdisc);
+		if (old)
+			qdisc_destroy(old);
+#ifdef CONFIG_NET_SCHED
+		if (ntx < dev->real_num_tx_queues)
+			qdisc_list_add(qdisc);
+#endif
+
 	}
 	kfree(priv->qdiscs);
 	priv->qdiscs = NULL;
diff --git a/net/sched/sch_mqprio.c b/net/sched/sch_mqprio.c
index d44c868..6749e2f 100644
--- a/net/sched/sch_mqprio.c
+++ b/net/sched/sch_mqprio.c
@@ -167,15 +167,17 @@ static void mqprio_attach(struct Qdisc *sch)
 {
 	struct net_device *dev = qdisc_dev(sch);
 	struct mqprio_sched *priv = qdisc_priv(sch);
-	struct Qdisc *qdisc;
+	struct Qdisc *qdisc, *old;
 	unsigned int ntx;
 
 	/* Attach underlying qdisc */
 	for (ntx = 0; ntx < dev->num_tx_queues; ntx++) {
 		qdisc = priv->qdiscs[ntx];
-		qdisc = dev_graft_qdisc(qdisc->dev_queue, qdisc);
-		if (qdisc)
-			qdisc_destroy(qdisc);
+		old = dev_graft_qdisc(qdisc->dev_queue, qdisc);
+		if (old)
+			qdisc_destroy(old);
+		if (ntx < dev->real_num_tx_queues)
+			qdisc_list_add(qdisc);
 	}
 	kfree(priv->qdiscs);
 	priv->qdiscs = NULL;