From 621ad27ca68f318db0d416e5c1401d35c95c6d91 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Tue, 9 Aug 2011 02:04:43 +0000 Subject: net_sched: prio: use qdisc_dequeue_peeked [ Upstream commit 3557619f0f6f7496ed453d4825e24958ab1884e0 ] commit 07bd8df5df4369487812bf85a237322ff3569b77 (sch_sfq: fix peek() implementation) changed sfq to use generic peek helper. This makes HFSC complain about a non-work-conserving child qdisc, if prio with sfq child is used within hfsc: hfsc peeks into prio qdisc, which will then peek into sfq. returned skb is stashed in sch->gso_skb. Next, hfsc tries to dequeue from prio, but prio will call sfq dequeue directly, which may return NULL instead of previously peeked-at skb. Have prio call qdisc_dequeue_peeked, so sfq->dequeue() is not called in this case. Cc: Eric Dumazet Signed-off-by: Florian Westphal Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/sched/sch_prio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/sched') diff --git a/net/sched/sch_prio.c b/net/sched/sch_prio.c index 2a318f2..b5d56a2 100644 --- a/net/sched/sch_prio.c +++ b/net/sched/sch_prio.c @@ -112,7 +112,7 @@ static struct sk_buff *prio_dequeue(struct Qdisc *sch) for (prio = 0; prio < q->bands; prio++) { struct Qdisc *qdisc = q->queues[prio]; - struct sk_buff *skb = qdisc->dequeue(qdisc); + struct sk_buff *skb = qdisc_dequeue_peeked(qdisc); if (skb) { qdisc_bstats_update(sch, skb); sch->q.qlen--; -- cgit v1.1