linux-kernel - [PATCH 2/9] ms_block: add error handling support for add

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Date:   Thu,  2 Sep 2021 10:40:58 -0700
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     axboe@...nel.dk, gregkh@...uxfoundation.org,
        chaitanya.kulkarni@....com, atulgopinathan@...il.com, hare@...e.de,
        maximlevitsky@...il.com, oakad@...oo.com, ulf.hansson@...aro.org,
        colin.king@...onical.com, shubhankarvk@...il.com,
        baijiaju1990@...il.com, trix@...hat.com,
        dongsheng.yang@...ystack.cn, ceph-devel@...r.kernel.org,
        miquel.raynal@...tlin.com, richard@....at, vigneshr@...com,
        sth@...ux.ibm.com, hoeppner@...ux.ibm.com, hca@...ux.ibm.com,
        gor@...ux.ibm.com, borntraeger@...ibm.com, oberpar@...ux.ibm.com,
        tj@...nel.org
Cc:     linux-s390@...r.kernel.org, linux-mtd@...ts.infradead.org,
        linux-mmc@...r.kernel.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, Luis Chamberlain <mcgrof@...nel.org>
Subject: [PATCH 2/9] ms_block: add error handling support for add_disk()

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

Contrary to the typical removal which delays the put_disk()
until later, since we are failing on a probe we immediately
put the disk on failure from add_disk by using
blk_cleanup_disk().

Signed-off-by: Luis Chamberlain <mcgrof@...nel.org>
---
 drivers/memstick/core/ms_block.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/memstick/core/ms_block.c b/drivers/memstick/core/ms_block.c
index 4a4573fa7b0f..86c626933c1a 100644
--- a/drivers/memstick/core/ms_block.c
+++ b/drivers/memstick/core/ms_block.c
@@ -2156,10 +2156,14 @@ static int msb_init_disk(struct memstick_dev *card)
 		set_disk_ro(msb->disk, 1);
 
 	msb_start(card);
-	device_add_disk(&card->dev, msb->disk, NULL);
+	rc = device_add_disk(&card->dev, msb->disk, NULL);
+	if (rc)
+		goto out_cleanup_disk;
 	dbg("Disk added");
 	return 0;
 
+out_cleanup_disk:
+	blk_cleanup_disk(msb->disk);
 out_free_tag_set:
 	blk_mq_free_tag_set(&msb->tag_set);
 out_release_id:
-- 
2.30.2