Re: [PATCH v3 1/2] ACPI: scan: do not enumerate MSFT8000 as a serial bus slave

[Armin Wolf]

Am 29.08.26 um 16:55 schrieb Edward Blair:

> MSFT8000 represents the Windows Resource Hub Proxy. Its SerialBus
> resources describe connections that Windows exposes to userspace rather
> than a physical peripheral attached to a serial bus.
>
> Treat the device like other ACPI nodes which contain SerialBus resources
> without being serial bus slaves. This keeps the ACPI device present while
> preventing the resources from being instantiated as I2C, SPI or serdev
> clients and conflicting with the actual devices.

Reviewed-by: Armin Wolf <W_Armin@xxxxxx>

> Suggested-by: Armin Wolf <W_Armin@xxxxxx>
> Signed-off-by: Edward Blair <edward.blair@xxxxxxxxx>
> ---
>   drivers/acpi/scan.c | 5 +++++
>   1 file changed, 5 insertions(+)
>
> diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
> index 7dcf78419..608527cda 100644
> --- a/drivers/acpi/scan.c
> +++ b/drivers/acpi/scan.c
> @@ -1770,6 +1770,11 @@ static bool acpi_device_enumeration_by_parent(struct acpi_device *device)
>   	 * attached to a serial bus at all.
>   	 */
>   		{"MSHW0028", },
> +	/*
> +	 * MSFT8000 is a Windows Resource Hub Proxy device. Its SerialBus
> +	 * resources grant userspace access and do not describe a slave.
> +	 */
> +		{"MSFT8000", },
>   	/*
>   	 * HIDs of device with an UartSerialBusV2 resource for which userspace
>   	 * expects a regular tty cdev to be created (instead of the in kernel