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Commit 23a60124 authored by Bart Van Assche's avatar Bart Van Assche Committed by Mike Snitzer
Browse files

dm rq: check blk_mq_register_dev() return value in dm_mq_init_request_queue() 



Otherwise the request-based DM blk-mq request_queue will be put into
service without being properly exported via sysfs.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent c1d7ecf7

drivers/md/dm-rq.c

+5 −1
Original line number Diff line number Diff line
@@ -809,10 +809,14 @@ 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 out_cleanup_queue;



	return 0;



out_cleanup_queue:

	blk_cleanup_queue(q);

out_tag_set:

	blk_mq_free_tag_set(md->tag_set);

out_kfree_tag_set: