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

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
...@@ -809,10 +809,14 @@ int dm_mq_init_request_queue(struct mapped_device *md, struct dm_table *t) ...@@ -809,10 +809,14 @@ int dm_mq_init_request_queue(struct mapped_device *md, struct dm_table *t)
dm_init_md_queue(md); dm_init_md_queue(md);
/* backfill 'mq' sysfs registration normally done in blk_register_queue */ /* 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; return 0;
out_cleanup_queue:
blk_cleanup_queue(q);
out_tag_set: out_tag_set:
blk_mq_free_tag_set(md->tag_set); blk_mq_free_tag_set(md->tag_set);
out_kfree_tag_set: out_kfree_tag_set:
......
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