linux-kernel - Re: [PATCH v2 5/8] platform/x86: asus-wmi: don't allow eGPU switching if eGPU not connected

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Date:   Wed, 12 Jul 2023 16:43:50 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     "Luke D. Jones" <luke@...nes.dev>
Cc:     corentin.chary@...il.com, acpi4asus-user@...ts.sourceforge.net,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hwmon@...r.kernel.org, markgross@...nel.org,
        jdelvare@...e.com, linux@...ck-us.net
Subject: Re: [PATCH v2 5/8] platform/x86: asus-wmi: don't allow eGPU switching
 if eGPU not connected

Hi,

On 6/30/23 07:35, Luke D. Jones wrote:
> Check the ASUS_WMI_DEVID_EGPU_CONNECTED method for eGPU connection
> before allowing the ASUS_WMI_DEVID_EGPU method to run.
> 
> Signed-off-by: Luke D. Jones <luke@...nes.dev>

Thanks, patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Regards,

Hans

> ---
>  drivers/platform/x86/asus-wmi.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
> index 0c8a4a46b121..821addb284d7 100644
> --- a/drivers/platform/x86/asus-wmi.c
> +++ b/drivers/platform/x86/asus-wmi.c
> @@ -693,6 +693,15 @@ static ssize_t egpu_enable_store(struct device *dev,
>  	if (enable > 1)
>  		return -EINVAL;
>  
> +	err = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_EGPU_CONNECTED);
> +	if (err < 0)
> +		return err;
> +	if (err < 1) {
> +		err = -ENODEV;
> +		pr_warn("Failed to set egpu disable: %d\n", err);
> +		return err;
> +	}
> +
>  	err = asus_wmi_set_devstate(ASUS_WMI_DEVID_EGPU, enable, &result);
>  	if (err) {
>  		pr_warn("Failed to set egpu disable: %d\n", err);