net/sched: Change behavior of mq select_queue()
authorJesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Tue, 17 Oct 2017 01:01:24 +0000 (18:01 -0700)
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>
Fri, 27 Oct 2017 16:41:45 +0000 (09:41 -0700)
commitce8a75f60b75831947569229616cf1bc94f2d965
treed00e05d070f3e2ef60e1e3be0e974314c15a4f1d
parent26aa0459fad28725aa0bc12a3615cc9a0bd7118f
net/sched: Change behavior of mq select_queue()

Currently, the class_ops select_queue() implementation on sch_mq
returns a pointer to netdev_queue #0 when it receives and invalid
qdisc id. That can be misleading since all of mq's inner qdiscs are
attached to a valid netdev_queue.

Here we fix that by returning NULL when a qdisc id is invalid. This is
aligned with how select_queue() is implemented for sch_mqprio in the
next patch on this series, keeping a consistent behavior between these
two qdiscs.

Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Tested-by: Henrik Austad <henrik@austad.us>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
net/sched/sch_mq.c