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Diffstat (limited to 'net')
-rw-r--r--net/core/dev.c9
-rw-r--r--net/sched/sch_generic.c6
2 files changed, 14 insertions, 1 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 600bb23c4c2e..d9e31f63aded 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1800,6 +1800,12 @@ gso:
spin_lock(root_lock);
+ if (unlikely(test_bit(__QDISC_STATE_DEACTIVATED, &q->state))) {
+ spin_unlock(root_lock);
+ rc = NET_XMIT_DROP;
+ goto out_kfree_skb;
+ }
+
rc = qdisc_enqueue_root(skb, q);
qdisc_run(q);
@@ -2084,7 +2090,8 @@ static int ing_filter(struct sk_buff *skb)
q = rxq->qdisc;
if (q != &noop_qdisc) {
spin_lock(qdisc_lock(q));
- result = qdisc_enqueue_root(skb, q);
+ if (likely(!test_bit(__QDISC_STATE_DEACTIVATED, &q->state)))
+ result = qdisc_enqueue_root(skb, q);
spin_unlock(qdisc_lock(q));
}
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 468574682caa..ff1c4557e5f8 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -597,6 +597,9 @@ static void transition_one_qdisc(struct net_device *dev,
struct Qdisc *new_qdisc = dev_queue->qdisc_sleeping;
int *need_watchdog_p = _need_watchdog;
+ if (!(new_qdisc->flags & TCQ_F_BUILTIN))
+ clear_bit(__QDISC_STATE_DEACTIVATED, &new_qdisc->state);
+
rcu_assign_pointer(dev_queue->qdisc, new_qdisc);
if (need_watchdog_p && new_qdisc != &noqueue_qdisc)
*need_watchdog_p = 1;
@@ -640,6 +643,9 @@ static void dev_deactivate_queue(struct net_device *dev,
if (qdisc) {
spin_lock_bh(qdisc_lock(qdisc));
+ if (!(qdisc->flags & TCQ_F_BUILTIN))
+ set_bit(__QDISC_STATE_DEACTIVATED, &qdisc->state);
+
dev_queue->qdisc = qdisc_default;
qdisc_reset(qdisc);