X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=net%2Fsched%2Fsch_atm.c;h=2a8b83af7c47a4bbee4471cc62894d46ca1d233a;hb=e65fcfd63a9a62baa5708484ff8edbe56eb3e7ec;hp=43d37256c15e3864655364ee96822a834266b89e;hpb=c27f339af90bb874a7a9c680b17abfd32d4a727b;p=safe%2Fjmp%2Flinux-2.6

diff --git a/net/sched/sch_atm.c b/net/sched/sch_atm.c
index 43d3725..2a8b83a 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,