blk_mq_register_dev() can fail. Hence check the return value of that function. Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx> Cc: Hannes Reinecke <hare@xxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxx> --- drivers/md/dm-rq.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c index ba5694be55a4..3ff7280f5dc5 100644 --- a/drivers/md/dm-rq.c +++ b/drivers/md/dm-rq.c @@ -813,10 +813,14 @@ int dm_mq_init_request_queue(struct mapped_device *md, struct dm_table *t) dm_init_md_queue(md); /* backfill 'mq' sysfs registration normally done in blk_register_queue */ - blk_mq_register_dev(disk_to_dev(md->disk), q); + err = blk_mq_register_dev(disk_to_dev(md->disk), q); + if (err) + goto free_queue; return 0; +free_queue: + blk_cleanup_queue(q); out_tag_set: blk_mq_free_tag_set(md->tag_set); out_kfree_tag_set: -- 2.12.2 -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
