Re: [PATCH 2/3] staging: unisys: use error codes

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Fri, Mar 27, 2015 at 02:00:58PM +0530, Sudip Mukherjee wrote:
> we were just returning -1 to the calling function which was again
> returning that if the module failed to load. Now we are returning the
> actual error codes.
> 
> Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
> ---
>  drivers/staging/unisys/visorchipset/file.c | 12 +++++++-----
>  1 file changed, 7 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/staging/unisys/visorchipset/file.c b/drivers/staging/unisys/visorchipset/file.c
> index 074c285..552febc 100644
> --- a/drivers/staging/unisys/visorchipset/file.c
> +++ b/drivers/staging/unisys/visorchipset/file.c
> @@ -56,18 +56,20 @@ visorchipset_file_init(dev_t major_dev, struct visorchannel **controlvm_channel)
>  	cdev_init(&file_cdev, &visorchipset_fops);
>  	file_cdev.owner = THIS_MODULE;
>  	if (MAJOR(major_dev) == 0) {
> +		rc = alloc_chrdev_region(&major_dev, 0, 1, MYDRVNAME);
>  		/* dynamic major device number registration required */
> -		if (alloc_chrdev_region(&major_dev, 0, 1, MYDRVNAME) < 0)
> -			return -1;
> +		if (rc < 0)
> +			return rc;
>  	} else {
>  		/* static major device number registration required */
> -		if (register_chrdev_region(major_dev, 1, MYDRVNAME) < 0)
> -			return -1;
> +		rc = register_chrdev_region(major_dev, 1, MYDRVNAME);
> +		if (rc < 0)
> +			return rc;
>  	}
>  	rc = cdev_add(&file_cdev, MKDEV(MAJOR(major_dev), 0), 1);
>  	if (rc  < 0) {
>  		unregister_chrdev_region(major_dev, 1);
> -		return -1;
> +		return rc;

I should have kept reading in the patch series, nice fix up :)