linux-kernel - Re: [PATCH v1 7/8] null_blk: add error handling support for add

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Message-ID: <20210512164709.GA4332@42.do-not-panic.com>
Date:   Wed, 12 May 2021 16:47:09 +0000
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     Hannes Reinecke <hare@...e.de>
Cc:     axboe@...nel.dk, bvanassche@....org, ming.lei@...hat.com,
        hch@...radead.org, jack@...e.cz, osandov@...com,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 7/8] null_blk: add error handling support for
 add_disk()

On Wed, May 12, 2021 at 05:16:39PM +0200, Hannes Reinecke wrote:
> 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@...nel.org>
> > ---
> >   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() ?

That function does not exist, do you mean null_free_zoned_dev()? If so
that is done by the caller.

  Luis