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

Message ID 20210830212538.148729-3-mcgrof@kernel.org
State New
Headers show
Series block: first batch of add_disk() error handling conversions | expand

Commit Message

Luis Chamberlain Aug. 30, 2021, 9:25 p.m. UTC 
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@lst.de>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
---
 drivers/scsi/sr.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Comments

Hannes Reinecke Sept. 6, 2021, 6:13 a.m. UTC | #1 
On 8/30/21 11:25 PM, 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@lst.de>
> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
> ---
>   drivers/scsi/sr.c | 5 ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
Ming Lei Sept. 7, 2021, 1:37 a.m. UTC | #2 
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@lst.de>

> Signed-off-by: Luis Chamberlain <mcgrof@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.


Thanks,
Ming
Luis Chamberlain Sept. 13, 2021, 5:26 p.m. UTC | #3 
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@lst.de>
> > Signed-off-by: Luis Chamberlain <mcgrof@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
diff mbox series

Patch

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;
 
 	sdev_printk(KERN_DEBUG, sdev,
 		    "Attached scsi CD-ROM %s\n", cd->cdi.name);