Re: [PATCH v1 7/8] null_blk: add error handling support for add_disk()

From: Hannes Reinecke
Date: Wed May 12 2021 - 11:39:58 EST


On 5/12/21 8:46 AM, 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.

Signed-off-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>
---
drivers/block/null_blk/main.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c
index 5f006d9e1472..2346d1292b26 100644
--- a/drivers/block/null_blk/main.c
+++ b/drivers/block/null_blk/main.c
@@ -1699,6 +1699,7 @@ static int init_driver_queues(struct nullb *nullb)
static int null_gendisk_register(struct nullb *nullb)
{
+ int ret;
sector_t size = ((sector_t)nullb->dev->size * SZ_1M) >> SECTOR_SHIFT;
struct gendisk *disk;
@@ -1719,13 +1720,17 @@ static int null_gendisk_register(struct nullb *nullb)
strncpy(disk->disk_name, nullb->disk_name, DISK_NAME_LEN);
if (nullb->dev->zoned) {
- int ret = null_register_zoned_dev(nullb);
+ ret = null_register_zoned_dev(nullb);
if (ret)
return ret;
}
- add_disk(disk);
+ ret = add_disk(disk);
+ if (ret) {

unregister_zoned_device() ?

+ put_disk(disk);
+ return ret;
+ }
return 0;
}
Cheers,

Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
hare@xxxxxxx +49 911 74053 688
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