[PATCH] staging: most: cdev: fix chrdev_region leak in mod_exit

[Christian.Gromm at microchip.com]

On Mi, 2019-04-24 at 21:23 +0200, Eugeniu Rosca wrote:
> External E-Mail
> 
> 
> From: Suresh Udipi <sudipi at jp.adit-jv.com>
> 
> It looks like v4.18-rc1 commit [0] which upstreams mld-1.8.0
> commit [1] missed to fix the memory leak in mod_exit function.
> 
> Do it now.
> 
> [0] aba258b7310167 ("staging: most: cdev: fix chrdev_region leak")
> [1] https://github.com/microchip-ais/linux/commit/a2d8f7ae7ea381
>     ("staging: most: cdev: fix leak for chrdev_region")
> 
> Signed-off-by: Suresh Udipi <sudipi at jp.adit-jv.com>
> Signed-off-by: Eugeniu Rosca <erosca at de.adit-jv.com>

Acked-by: Christian Gromm <christian.gromm at microchip.com>

> ---
>  drivers/staging/most/cdev/cdev.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/most/cdev/cdev.c
> b/drivers/staging/most/cdev/cdev.c
> index f2b347cda8b7..d5f236889021 100644
> --- a/drivers/staging/most/cdev/cdev.c
> +++ b/drivers/staging/most/cdev/cdev.c
> @@ -549,7 +549,7 @@ static void __exit mod_exit(void)
>  		destroy_cdev(c);
>  		destroy_channel(c);
>  	}
> -	unregister_chrdev_region(comp.devno, 1);
> +	unregister_chrdev_region(comp.devno, CHRDEV_REGION_SIZE);
>  	ida_destroy(&comp.minor_id);
>  	class_destroy(comp.class);
>  }