blkcg: skip blkg printing if q isn't associated with disk

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blk-cgroup printing code currently assumes that there is a device/disk
associated with every queue in the system, but modules like floppy,
can instantiate request queues without registering disk which can lead
to oops.

Skip the queue/blkg which don't have dev/disk associated with them.

-tj: Factored out backing_dev_info check into blkg_dev_name().

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Vivek Goyal 2012-03-05 13:15:10 -08:00 • committed by Jens Axboe

parent 7a4dd281ec

commit 92616b5b3a

1 changed files with 14 additions and 3 deletions

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block/blk-cgroup.c

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