Re: [PATCH] hwmon: (corsair-psu) Fix probe when built-in

[Wilken Gottwalt]

On Thu,  7 Dec 2023 22:07:23 +0100
Armin Wolf <W_Armin@xxxxxx> wrote:

Just forgot. Did both, works just fine. Is it okay that way? This is my first
time.

Tested-by: Wilken Gottwalt <wilken.gottwalt@xxxxxxxxxx>
Reviewed-by: Wilken Gottwalt <wilken.gottwalt@xxxxxxxxxx>

> It seems that when the driver is built-in, the HID bus is
> initialized after the driver is loaded, which whould cause
> module_hid_driver() to fail.
> Fix this by registering the driver after the HID bus using
> late_initcall() in accordance with other hwmon HID drivers.
> 
> Compile-tested only.
> 
> Signed-off-by: Armin Wolf <W_Armin@xxxxxx>
> ---
>  drivers/hwmon/corsair-psu.c | 18 +++++++++++++++++-
>  1 file changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/hwmon/corsair-psu.c b/drivers/hwmon/corsair-psu.c
> index 904890598c11..2c7c92272fe3 100644
> --- a/drivers/hwmon/corsair-psu.c
> +++ b/drivers/hwmon/corsair-psu.c
> @@ -899,7 +899,23 @@ static struct hid_driver corsairpsu_driver = {
>  	.reset_resume	= corsairpsu_resume,
>  #endif
>  };
> -module_hid_driver(corsairpsu_driver);
> +
> +static int __init corsair_init(void)
> +{
> +	return hid_register_driver(&corsairpsu_driver);
> +}
> +
> +static void __exit corsair_exit(void)
> +{
> +	hid_unregister_driver(&corsairpsu_driver);
> +}
> +
> +/*
> + * With module_init() the driver would load before the HID bus when
> + * built-in, so use late_initcall() instead.
> + */
> +late_initcall(corsair_init);
> +module_exit(corsair_exit);
> 
>  MODULE_LICENSE("GPL");
>  MODULE_AUTHOR("Wilken Gottwalt <wilken.gottwalt@xxxxxxxxxx>");
> --
> 2.39.2
>