taprio: Use taprio_reset_tc() to reset Traffic Classes configuration

When destroying the current taprio instance, which can happen when the
creation of one fails, we should reset the traffic class configuration
back to the default state.

netdev_reset_tc() is a better way because in addition to setting the
number of traffic classes to zero, it also resets the priority to
traffic classes mapping to the default value.

Fixes: 5a781ccbd19e ("tc: Add support for configuring the taprio scheduler")
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/sch_taprio.c b/net/sched/sch_taprio.c
index b82a9769ab406b6962925994008f598dbca678a2..21df69071df2b1de648fdcc4ac316ec18c9b459b 100644 (file)
--- a/net/sched/sch_taprio.c
+++ b/net/sched/sch_taprio.c
@@ -1588,7 +1588,7 @@ static void taprio_destroy(struct Qdisc *sch)
        }
        q->qdiscs = NULL;
 
-       netdev_set_num_tc(dev, 0);
+       netdev_reset_tc(dev);
 
        if (q->oper_sched)
                call_rcu(&q->oper_sched->rcu, taprio_free_sched_cb);