[PATCH v3 2/8] scsi/sr: add error handling support for add_disk()

[Luis Chamberlain]

On Tue, Sep 07, 2021 at 09:37:05AM +0800, Ming Lei wrote:
> On Mon, Aug 30, 2021 at 02:25:32PM -0700, 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.
> > 
> > Reviewed-by: Christoph Hellwig <hch at lst.de>
> > Signed-off-by: Luis Chamberlain <mcgrof at kernel.org>
> > ---
> >  drivers/scsi/sr.c | 5 ++++-
> >  1 file changed, 4 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
> > index 2942a4ec9bdd..72fd21844367 100644
> > --- a/drivers/scsi/sr.c
> > +++ b/drivers/scsi/sr.c
> > @@ -779,7 +779,10 @@ static int sr_probe(struct device *dev)
> >  	dev_set_drvdata(dev, cd);
> >  	disk->flags |= GENHD_FL_REMOVABLE;
> >  	sr_revalidate_disk(cd);
> > -	device_add_disk(&sdev->sdev_gendev, disk, NULL);
> > +
> > +	error = device_add_disk(&sdev->sdev_gendev, disk, NULL);
> > +	if (error)
> > +		goto fail_minor;
> 
> You don't undo register_cdrom(), maybe you can use kref_put(&cd->kref, sr_kref_release);
> to simplify the error handling.

Works with me, thanks!

  Luis