linux-kernel - [PATCH 3/3] nbd: add error handling support for add

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Message-Id: <20210715195141.1882285-4-mcgrof@kernel.org>
Date:   Thu, 15 Jul 2021 12:51:41 -0700
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     axboe@...nel.dk
Cc:     hare@...e.de, bvanassche@....org, ming.lei@...hat.com,
        hch@...radead.org, jack@...e.cz, osandov@...com,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Luis Chamberlain <mcgrof@...nel.org>
Subject: [PATCH 3/3] nbd: 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.

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

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index b7d663736d35..0ecc1e4e16fd 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -1730,10 +1730,14 @@ static int nbd_dev_add(int index)
 	disk->fops = &nbd_fops;
 	disk->private_data = nbd;
 	sprintf(disk->disk_name, "nbd%d", index);
-	add_disk(disk);
+	err = add_disk(disk);
+	if (err)
+		goto out_err_disk;
 	nbd_total_devices++;
 	return index;
 
+out_err_disk:
+	blk_cleanup_disk(disk);
 out_free_idr:
 	idr_remove(&nbd_index_idr, index);
 out_free_tags:
-- 
2.27.0