diff mbox series

[v3,5/8] md: add error handling support for add_disk()

Message ID 20210830212538.148729-6-mcgrof@kernel.org
State New
Headers show
Series block: first batch of add_disk() error handling conversions | expand

Commit Message

Luis Chamberlain Aug. 30, 2021, 9:25 p.m. UTC 
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.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
---
 drivers/md/md.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

Comments

Hannes Reinecke Sept. 6, 2021, 6:17 a.m. UTC | #1 
On 8/30/21 11:25 PM, Luis Chamberlain wrote:
> 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.

> 

> Reviewed-by: Christoph Hellwig <hch@lst.de>

> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>

> ---

>   drivers/md/md.c | 7 ++++++-

>   1 file changed, 6 insertions(+), 1 deletion(-)

> 

Reviewed-by: Hannes Reinecke <hare@suse.de>


Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Kernel Storage Architect
hare@suse.de                              +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer
diff mbox series

Patch

diff --git a/drivers/md/md.c b/drivers/md/md.c
index ae8fe54ea358..5c0d3536d7c7 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5704,7 +5704,11 @@  static int md_alloc(dev_t dev, char *name)
 	 * through to md_open, so make sure it doesn't get too far
 	 */
 	mutex_lock(&mddev->open_mutex);
-	add_disk(disk);
+	error = add_disk(disk);
+	if (error) {
+		blk_cleanup_disk(disk);
+		goto abort_unlock;
+	}
 
 	error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md");
 	if (error) {
@@ -5718,6 +5722,7 @@  static int md_alloc(dev_t dev, char *name)
 	if (mddev->kobj.sd &&
 	    sysfs_create_group(&mddev->kobj, &md_bitmap_group))
 		pr_debug("pointless warning\n");
+ abort_unlock:
 	mutex_unlock(&mddev->open_mutex);
  abort:
 	mutex_unlock(&disks_mutex);