--- zzzz-none-000/linux-3.10.107/net/sched/sch_mqprio.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/net/sched/sch_mqprio.c	2021-02-04 17:41:59.000000000 +0000
@@ -124,7 +124,7 @@
 
 	for (i = 0; i < dev->num_tx_queues; i++) {
 		dev_queue = netdev_get_tx_queue(dev, i);
-		qdisc = qdisc_create_dflt(dev_queue, &pfifo_fast_ops,
+		qdisc = qdisc_create_dflt(dev_queue, &fq_codel_qdisc_ops,
 					  TC_H_MAKE(TC_H_MAJ(sch->handle),
 						    TC_H_MIN(i + 1)));
 		if (qdisc == NULL) {
@@ -132,7 +132,7 @@
 			goto err;
 		}
 		priv->qdiscs[i] = qdisc;
-		qdisc->flags |= TCQ_F_ONETXQUEUE;
+		qdisc->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT;
 	}
 
 	/* If the mqprio options indicate that hardware should own
@@ -167,15 +167,17 @@
 {
 	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;
@@ -207,7 +209,7 @@
 	*old = dev_graft_qdisc(dev_queue, new);
 
 	if (new)
-		new->flags |= TCQ_F_ONETXQUEUE;
+		new->flags |= TCQ_F_ONETXQUEUE | TCQ_F_NOPARENT;
 
 	if (dev->flags & IFF_UP)
 		dev_activate(dev);
@@ -229,12 +231,11 @@
 	memset(&sch->qstats, 0, sizeof(sch->qstats));
 
 	for (i = 0; i < dev->num_tx_queues; i++) {
-		qdisc = netdev_get_tx_queue(dev, i)->qdisc;
+		qdisc = rtnl_dereference(netdev_get_tx_queue(dev, i)->qdisc);
 		spin_lock_bh(qdisc_lock(qdisc));
 		sch->q.qlen		+= qdisc->q.qlen;
 		sch->bstats.bytes	+= qdisc->bstats.bytes;
 		sch->bstats.packets	+= qdisc->bstats.packets;
-		sch->qstats.qlen	+= qdisc->qstats.qlen;
 		sch->qstats.backlog	+= qdisc->qstats.backlog;
 		sch->qstats.drops	+= qdisc->qstats.drops;
 		sch->qstats.requeues	+= qdisc->qstats.requeues;
@@ -325,6 +326,7 @@
 
 	if (cl <= netdev_get_num_tc(dev)) {
 		int i;
+		__u32 qlen = 0;
 		struct Qdisc *qdisc;
 		struct gnet_stats_queue qstats = {0};
 		struct gnet_stats_basic_packed bstats = {0};
@@ -338,11 +340,13 @@
 		spin_unlock_bh(d->lock);
 
 		for (i = tc.offset; i < tc.offset + tc.count; i++) {
-			qdisc = netdev_get_tx_queue(dev, i)->qdisc;
+			struct netdev_queue *q = netdev_get_tx_queue(dev, i);
+
+			qdisc = rtnl_dereference(q->qdisc);
 			spin_lock_bh(qdisc_lock(qdisc));
+			qlen		  += qdisc->q.qlen;
 			bstats.bytes      += qdisc->bstats.bytes;
 			bstats.packets    += qdisc->bstats.packets;
-			qstats.qlen       += qdisc->qstats.qlen;
 			qstats.backlog    += qdisc->qstats.backlog;
 			qstats.drops      += qdisc->qstats.drops;
 			qstats.requeues   += qdisc->qstats.requeues;
@@ -351,16 +355,16 @@
 		}
 		/* Reclaim root sleeping lock before completing stats */
 		spin_lock_bh(d->lock);
-		if (gnet_stats_copy_basic(d, &bstats) < 0 ||
-		    gnet_stats_copy_queue(d, &qstats) < 0)
+		if (gnet_stats_copy_basic(d, NULL, &bstats) < 0 ||
+		    gnet_stats_copy_queue(d, NULL, &qstats, qlen) < 0)
 			return -1;
 	} else {
 		struct netdev_queue *dev_queue = mqprio_queue_get(sch, cl);
 
 		sch = dev_queue->qdisc_sleeping;
-		sch->qstats.qlen = sch->q.qlen;
-		if (gnet_stats_copy_basic(d, &sch->bstats) < 0 ||
-		    gnet_stats_copy_queue(d, &sch->qstats) < 0)
+		if (gnet_stats_copy_basic(d, NULL, &sch->bstats) < 0 ||
+		    gnet_stats_copy_queue(d, NULL,
+					  &sch->qstats, sch->q.qlen) < 0)
 			return -1;
 	}
 	return 0;