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authorJarek Poplawski <jarkao2@gmail.com>2009-09-15 13:53:07 +0400
committerDavid S. Miller <davem@davemloft.net>2009-09-15 13:53:07 +0400
commit926e61b7c44db83013159ac2f74bccd451607b5a (patch)
tree512b532e22d4374948e0d149902304edfbef7e25 /net/sched/sch_mq.c
parentca519274d537706b6fb1e3e91238d34a23320584 (diff)
downloadlinux-926e61b7c44db83013159ac2f74bccd451607b5a.tar.xz
pkt_sched: Fix tx queue selection in tc_modify_qdisc
After the recent mq change there is the new select_queue qdisc class method used in tc_modify_qdisc, but it works OK only for direct child qdiscs of mq qdisc. Grandchildren always get the first tx queue, which would give wrong qdisc_root etc. results (e.g. for sch_htb as child of sch_prio). This patch fixes it by using parent's dev_queue for such grandchildren qdiscs. The select_queue method's return type is changed BTW. With feedback from: Patrick McHardy <kaber@trash.net> Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_mq.c')
-rw-r--r--net/sched/sch_mq.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/net/sched/sch_mq.c b/net/sched/sch_mq.c
index dd5ee022f1f7..600c50143cc7 100644
--- a/net/sched/sch_mq.c
+++ b/net/sched/sch_mq.c
@@ -125,13 +125,18 @@ static struct netdev_queue *mq_queue_get(struct Qdisc *sch, unsigned long cl)
return netdev_get_tx_queue(dev, ntx);
}
-static unsigned int mq_select_queue(struct Qdisc *sch, struct tcmsg *tcm)
+static struct netdev_queue *mq_select_queue(struct Qdisc *sch,
+ struct tcmsg *tcm)
{
unsigned int ntx = TC_H_MIN(tcm->tcm_parent);
+ struct netdev_queue *dev_queue = mq_queue_get(sch, ntx);
- if (!mq_queue_get(sch, ntx))
- return 0;
- return ntx - 1;
+ if (!dev_queue) {
+ struct net_device *dev = qdisc_dev(sch);
+
+ return netdev_get_tx_queue(dev, 0);
+ }
+ return dev_queue;
}
static int mq_graft(struct Qdisc *sch, unsigned long cl, struct Qdisc *new,