Re: [PATCH 3/3] null_blk: validated the number of devices

[Matthew Wilcox]

On Wed, Sep 11, 2019 at 11:46:36AM -0300, André Almeida wrote:
>  
> -static int nr_devices = 1;
> +static unsigned int nr_devices = 1;
>  module_param(nr_devices, int, 0444);

^^^ you forgot to change the module_param to match

> +     if (!nr_devices) {
> +             pr_err("null_blk: invalid number of devices\n");
> +             return -EINVAL;
> +     }

I don't think this is necessary.