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>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 88eb9de095de..c33180dd42b4 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -81,7 +81,7 @@ struct Qdisc
 struct Qdisc_class_ops
 {
         /* Child qdisc manipulation */
-        unsigned int            (*select_queue)(struct Qdisc *, struct tcmsg *);
+        struct netdev_queue *   (*select_queue)(struct Qdisc *, struct tcmsg *);
         int                     (*graft)(struct Qdisc *, unsigned long cl,
                                         struct Qdisc *, struct Qdisc **);
         struct Qdisc *          (*leaf)(struct Qdisc *, unsigned long cl);