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Diffstat (limited to 'net/sched/sch_atm.c')
-rw-r--r--net/sched/sch_atm.c36
1 files changed, 16 insertions, 20 deletions
diff --git a/net/sched/sch_atm.c b/net/sched/sch_atm.c
index 43d37256c15e..2a8b83af7c47 100644
--- a/net/sched/sch_atm.c
+++ b/net/sched/sch_atm.c
@@ -62,7 +62,7 @@ struct atm_qdisc_data {
struct atm_flow_data link; /* unclassified skbs go here */
struct atm_flow_data *flows; /* NB: "link" is also on this
list */
- struct tasklet_struct task; /* requeue tasklet */
+ struct tasklet_struct task; /* dequeue tasklet */
};
/* ------------------------- Class/flow operations ------------------------- */
@@ -102,7 +102,8 @@ static int atm_tc_graft(struct Qdisc *sch, unsigned long arg,
return -EINVAL;
if (!new)
new = &noop_qdisc;
- *old = xchg(&flow->q, new);
+ *old = flow->q;
+ flow->q = new;
if (*old)
qdisc_reset(*old);
return 0;
@@ -480,11 +481,14 @@ static void sch_atm_dequeue(unsigned long data)
* If traffic is properly shaped, this won't generate nasty
* little bursts. Otherwise, it may ... (but that's okay)
*/
- while ((skb = flow->q->dequeue(flow->q))) {
- if (!atm_may_send(flow->vcc, skb->truesize)) {
- (void)flow->q->ops->requeue(skb, flow->q);
+ while ((skb = flow->q->ops->peek(flow->q))) {
+ if (!atm_may_send(flow->vcc, skb->truesize))
break;
- }
+
+ skb = qdisc_dequeue_peeked(flow->q);
+ if (unlikely(!skb))
+ break;
+
pr_debug("atm_tc_dequeue: sending on class %p\n", flow);
/* remove any LL header somebody else has attached */
skb_pull(skb, skb_network_offset(skb));
@@ -516,27 +520,19 @@ static struct sk_buff *atm_tc_dequeue(struct Qdisc *sch)
pr_debug("atm_tc_dequeue(sch %p,[qdisc %p])\n", sch, p);
tasklet_schedule(&p->task);
- skb = p->link.q->dequeue(p->link.q);
+ skb = qdisc_dequeue_peeked(p->link.q);
if (skb)
sch->q.qlen--;
return skb;
}
-static int atm_tc_requeue(struct sk_buff *skb, struct Qdisc *sch)
+static struct sk_buff *atm_tc_peek(struct Qdisc *sch)
{
struct atm_qdisc_data *p = qdisc_priv(sch);
- int ret;
- pr_debug("atm_tc_requeue(skb %p,sch %p,[qdisc %p])\n", skb, sch, p);
- ret = p->link.q->ops->requeue(skb, p->link.q);
- if (!ret) {
- sch->q.qlen++;
- sch->qstats.requeues++;
- } else if (net_xmit_drop_count(ret)) {
- sch->qstats.drops++;
- p->link.qstats.drops++;
- }
- return ret;
+ pr_debug("atm_tc_peek(sch %p,[qdisc %p])\n", sch, p);
+
+ return p->link.q->ops->peek(p->link.q);
}
static unsigned int atm_tc_drop(struct Qdisc *sch)
@@ -694,7 +690,7 @@ static struct Qdisc_ops atm_qdisc_ops __read_mostly = {
.priv_size = sizeof(struct atm_qdisc_data),
.enqueue = atm_tc_enqueue,
.dequeue = atm_tc_dequeue,
- .requeue = atm_tc_requeue,
+ .peek = atm_tc_peek,
.drop = atm_tc_drop,
.init = atm_tc_init,
.reset = atm_tc_reset,