--- zzzz-none-000/linux-4.9.276/net/sched/sch_drr.c	2021-07-20 14:21:16.000000000 +0000
+++ falcon-5530-750/linux-4.9.276/net/sched/sch_drr.c	2023-04-05 08:19:02.000000000 +0000
@@ -39,6 +39,43 @@
 	struct Qdisc_class_hash		clhash;
 };
 
+static int drr_offload(struct Qdisc *sch, enum tc_drr_command cmd)
+{
+	struct net_device *dev = qdisc_dev(sch);
+	struct tc_drr_qopt_offload opt = {
+		.command = cmd,
+		.parent = sch->parent,
+		.handle = sch->handle,
+	};
+	struct tc_to_netdev tc = { .type = TC_SETUP_DRR,
+				   { .sch_drr = &opt } };
+
+	if (!(dev->features & NETIF_F_HW_TC) || !dev->netdev_ops->ndo_setup_tc)
+		return -EOPNOTSUPP;
+
+	return dev->netdev_ops->ndo_setup_tc(dev, sch->handle, 0, &tc);
+}
+
+static int drr_cl_offload(struct Qdisc *sch, struct drr_class *cl,
+			  enum tc_drr_command cmd)
+{
+	struct net_device *dev = qdisc_dev(sch);
+	struct tc_drr_qopt_offload opt = {
+		.command = cmd,
+		.parent = sch->handle,
+		.handle = cl->common.classid,
+	};
+	struct tc_to_netdev tc = { .type = TC_SETUP_DRR,
+				   { .sch_drr = &opt } };
+
+	if (!(dev->features & NETIF_F_HW_TC) || !dev->netdev_ops->ndo_setup_tc)
+		return -EOPNOTSUPP;
+
+	opt.set_params.quantum = cl->quantum;
+
+	return dev->netdev_ops->ndo_setup_tc(dev, cl->common.classid, 0, &tc);
+}
+
 static struct drr_class *drr_find_class(struct Qdisc *sch, u32 classid)
 {
 	struct drr_sched *q = qdisc_priv(sch);
@@ -136,6 +173,8 @@
 
 	qdisc_class_hash_grow(sch, &q->clhash);
 
+	drr_cl_offload(sch, cl, TC_DRR_REPLACE);
+
 	*arg = (unsigned long)cl;
 	return 0;
 }
@@ -144,6 +183,7 @@
 {
 	gen_kill_estimator(&cl->bstats, &cl->rate_est);
 	qdisc_destroy(cl->qdisc);
+	drr_cl_offload(sch, cl, TC_DRR_DESTROY);
 	kfree(cl);
 }
 
@@ -244,8 +284,7 @@
 {
 	struct drr_class *cl = (struct drr_class *)arg;
 
-	if (cl->qdisc->q.qlen == 0)
-		list_del(&cl->alist);
+	list_del(&cl->alist);
 }
 
 static int drr_dump_class(struct Qdisc *sch, unsigned long arg,
@@ -337,6 +376,7 @@
 		switch (result) {
 		case TC_ACT_QUEUED:
 		case TC_ACT_STOLEN:
+		case TC_ACT_TRAP:
 			*qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
 		case TC_ACT_SHOT:
 			return NULL;
@@ -433,6 +473,9 @@
 	if (err < 0)
 		return err;
 	INIT_LIST_HEAD(&q->active);
+
+	drr_offload(sch, TC_DRR_REPLACE);
+
 	return 0;
 }
 
@@ -468,6 +511,8 @@
 			drr_destroy_class(sch, cl);
 	}
 	qdisc_class_hash_destroy(&q->clhash);
+
+	drr_offload(sch, TC_DRR_DESTROY);
 }
 
 static const struct Qdisc_class_ops drr_class_ops = {