Re: [PATCH] staging: pi433: add missing call to cdev_del()

[Dan Carpenter <dan.carpenter@oracle.com>]

On Mon, Nov 26, 2018 at 06:53:55PM +0100, Michael Straube wrote:
> If cdev_add() fails, cdev_del() should be called.
> Add the missing cdev_del() call as pointed out by
> Dan Carpenter.
> 
> Signed-off-by: Michael Straube <straube.linux@gmail.com>
> ---
>  drivers/staging/pi433/pi433_if.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/staging/pi433/pi433_if.c b/drivers/staging/pi433/pi433_if.c
> index d72de2105053..abc98a544929 100644
> --- a/drivers/staging/pi433/pi433_if.c
> +++ b/drivers/staging/pi433/pi433_if.c
> @@ -1254,6 +1254,7 @@ static int pi433_probe(struct spi_device *spi)
>  	retval = cdev_add(device->cdev, device->devt, 1);
>  	if (retval) {
>  		dev_dbg(device->dev, "register of cdev failed");
> +		cdev_del(device->cdev);
>  		goto cdev_failed;

No no...  That's not the right thing.  Do "goto del_cdev;" and add a
label at the end.

del_cdev:
	cdev_del(device->cdev);

regards,
dan carpenter