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Subject: Re: [PATCH 6/9] s390/block/dasd_genhd: add error handling support for
 add_disk()
To:     Luis Chamberlain <mcgrof@kernel.org>, axboe@kernel.dk,
        gregkh@linuxfoundation.org, chaitanya.kulkarni@wdc.com,
        atulgopinathan@gmail.com, hare@suse.de, maximlevitsky@gmail.com,
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        dongsheng.yang@easystack.cn, ceph-devel@vger.kernel.org,
        miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com,
        sth@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com,
        borntraeger@de.ibm.com, oberpar@linux.ibm.com, tj@kernel.org
Cc:     linux-s390@vger.kernel.org, linux-mtd@lists.infradead.org,
        linux-mmc@vger.kernel.org, linux-block@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <20210902174105.2418771-1-mcgrof@kernel.org>
 <20210902174105.2418771-7-mcgrof@kernel.org>
From:   =?UTF-8?Q?Jan_H=c3=b6ppner?= <hoeppner@linux.ibm.com>
Message-ID: <d6140e40-a472-e732-9893-99e1839b717e@linux.ibm.com>
Date:   Mon, 13 Sep 2021 10:17:48 +0200
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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@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;
>  }
>  
>