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Diffstat (limited to 'net/sched/sch_generic.c')
-rw-r--r--net/sched/sch_generic.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 7e3fbe9cc936..39c144b6ff98 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -373,24 +373,33 @@ bool sch_direct_xmit(struct sk_buff *skb, struct Qdisc *q,
*/
static inline bool qdisc_restart(struct Qdisc *q, int *packets)
{
+ bool more, validate, nolock = q->flags & TCQ_F_NOLOCK;
spinlock_t *root_lock = NULL;
struct netdev_queue *txq;
struct net_device *dev;
struct sk_buff *skb;
- bool validate;
/* Dequeue packet */
+ if (nolock && test_and_set_bit(__QDISC_STATE_RUNNING, &q->state))
+ return false;
+
skb = dequeue_skb(q, &validate, packets);
- if (unlikely(!skb))
+ if (unlikely(!skb)) {
+ if (nolock)
+ clear_bit(__QDISC_STATE_RUNNING, &q->state);
return false;
+ }
- if (!(q->flags & TCQ_F_NOLOCK))
+ if (!nolock)
root_lock = qdisc_lock(q);
dev = qdisc_dev(q);
txq = skb_get_tx_queue(dev, skb);
- return sch_direct_xmit(skb, q, dev, txq, root_lock, validate);
+ more = sch_direct_xmit(skb, q, dev, txq, root_lock, validate);
+ if (nolock)
+ clear_bit(__QDISC_STATE_RUNNING, &q->state);
+ return more;
}
void __qdisc_run(struct Qdisc *q)