[PATCH 2/5] md: add error handling support for add_disk()

From: Luis Chamberlain <mcgrof@kernel.org>

We never checked for errors on add_disk() as this function
returned void. Now that this is fixed, use the shiny new
error handling.

We just do the unwinding of what was not done before, and are
sure to unlock prior to bailing.

Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/md/md.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 6c0c3d0d905aa..6bd5ad3c30b41 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c

@@ -5700,7 +5700,11 @@ static int md_alloc(dev_t dev, char *name)
 	disk->flags |= GENHD_FL_EXT_DEVT;
 	disk->events |= DISK_EVENT_MEDIA_CHANGE;
 	mddev->gendisk = disk;
-	add_disk(disk);
+	error = add_disk(disk);
+	if (error) {
+		blk_cleanup_disk(disk);
+		goto abort;
+	}
 
 	error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md");
 	if (error) {

-- 
2.30.2