[PATCH 6/9] s390/block/dasd_genhd: add error handling support for add_disk()

[Jan Höppner]

On 02/09/2021 19:41, 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 at kernel.org>
> ---
>  drivers/s390/block/dasd_genhd.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c
> index fa966e0db6ca..ba07022283bc 100644
> --- a/drivers/s390/block/dasd_genhd.c
> +++ b/drivers/s390/block/dasd_genhd.c
> @@ -33,7 +33,7 @@ int dasd_gendisk_alloc(struct dasd_block *block)
>  {
>  	struct gendisk *gdp;
>  	struct dasd_device *base;
> -	int len;
> +	int len, rc;
>  
>  	/* Make sure the minor for this device exists. */
>  	base = block->base;
> @@ -79,7 +79,11 @@ int dasd_gendisk_alloc(struct dasd_block *block)
>  	dasd_add_link_to_gendisk(gdp, base);
>  	block->gdp = gdp;
>  	set_capacity(block->gdp, 0);
> -	device_add_disk(&base->cdev->dev, block->gdp, NULL);
> +
> +	rc = device_add_disk(&base->cdev->dev, block->gdp, NULL);
> +	if (rc)
> +		return rc;
> +

I think, just like with some of the other changes, there is some
cleanup required before returning. I'll prepare a patch and
come back to you.

>  	return 0;
>  }
>  
>