linux-kernel - Re: [PATCH 08/10] dm: add add

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Message-ID: <YSk1EhUIr9OjIoVv@bombadil.infradead.org>
Date:   Fri, 27 Aug 2021 11:55:14 -0700
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     axboe@...nel.dk, martin.petersen@...cle.com, jejb@...ux.ibm.com,
        kbusch@...nel.org, sagi@...mberg.me, adrian.hunter@...el.com,
        beanhuo@...ron.com, ulf.hansson@...aro.org, avri.altman@....com,
        swboyd@...omium.org, agk@...hat.com, snitzer@...hat.com,
        josef@...icpanda.com, hare@...e.de, bvanassche@....org,
        ming.lei@...hat.com, linux-scsi@...r.kernel.org,
        linux-nvme@...ts.infradead.org, linux-mmc@...r.kernel.org,
        dm-devel@...hat.com, nbd@...er.debian.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/10] dm: add add_disk() error handling

On Tue, Aug 24, 2021 at 07:21:30AM +0100, Christoph Hellwig wrote:
> On Mon, Aug 23, 2021 at 01:29:28PM -0700, Luis Chamberlain wrote:
> > -	add_disk(md->disk);
> > +	r = add_disk(md->disk);
> > +	if (r)
> > +		goto out_cleanup_disk;
> >  
> >  	r = dm_sysfs_init(md);
> > -	if (r) {
> > -		del_gendisk(md->disk);
> > -		return r;
> > -	}
> > +	if (r)
> > +		goto out_del_gendisk;
> >  	md->type = type;
> >  	return 0;
> > +
> > +out_cleanup_disk:
> > +	blk_cleanup_disk(md->disk);
> > +out_del_gendisk:
> > +	del_gendisk(md->disk);
> > +	return r;
> 
> I think the add_disk should just return r.  If you look at the
> callers they eventualy end up in dm_table_destroy, which does
> this cleanup.

I don't see it. What part of dm_table_destroy() does this?

  Luis