linux-kernel - Re: [PATCH v2 4/7] surface: surface3-wmi: Use ACPI

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Date:   Tue, 19 Oct 2021 16:56:47 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Linux ACPI <linux-acpi@...r.kernel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Mark Gross <mgross@...ux.intel.com>,
        Maximilian Luz <luzmaximilian@...il.com>,
        platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH v2 4/7] surface: surface3-wmi: Use ACPI_COMPANION()
 directly

Hi,

On 10/13/21 18:10, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> 
> The ACPI_HANDLE() macro is a wrapper arond the ACPI_COMPANION()
> macro and the ACPI handle produced by the former comes from the
> ACPI device object produced by the latter, so it is way more
> straightforward to evaluate the latter directly instead of passing
> the handle produced by the former to acpi_bus_get_device().
> 
> Modify s3_wmi_check_platform_device() accordingly (no intentional
> functional impact).
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> Reviewed-by: Maximilian Luz <luzmaximilian@...il.com>

Thank you for your patch, I've applied this patch to my review-hans 
branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans

Note it will show up in my review-hans branch once I've pushed my
local branch there, which might take a while.

Once I've run some tests on this branch the patches there will be
added to the platform-drivers-x86/for-next branch and eventually
will be included in the pdx86 pull-request to Linus for the next
merge-window.

Regards,

Hans


> ---
> 
> v1 -> v2:
>    * Resend with a different From and S-o-b address and with R-by from
>      Maximilian.  No other changes.
> 
> ---
>  drivers/platform/surface/surface3-wmi.c |    9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)
> 
> Index: linux-pm/drivers/platform/surface/surface3-wmi.c
> ===================================================================
> --- linux-pm.orig/drivers/platform/surface/surface3-wmi.c
> +++ linux-pm/drivers/platform/surface/surface3-wmi.c
> @@ -139,13 +139,12 @@ static acpi_status s3_wmi_attach_spi_dev
>  
>  static int s3_wmi_check_platform_device(struct device *dev, void *data)
>  {
> -	struct acpi_device *adev, *ts_adev = NULL;
> -	acpi_handle handle;
> +	struct acpi_device *adev = ACPI_COMPANION(dev);
> +	struct acpi_device *ts_adev = NULL;
>  	acpi_status status;
>  
>  	/* ignore non ACPI devices */
> -	handle = ACPI_HANDLE(dev);
> -	if (!handle || acpi_bus_get_device(handle, &adev))
> +	if (!adev)
>  		return 0;
>  
>  	/* check for LID ACPI switch */
> @@ -159,7 +158,7 @@ static int s3_wmi_check_platform_device(
>  	    strlen(SPI_CTL_OBJ_NAME)))
>  		return 0;
>  
> -	status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
> +	status = acpi_walk_namespace(ACPI_TYPE_DEVICE, adev->handle, 1,
>  				     s3_wmi_attach_spi_device, NULL,
>  				     &ts_adev, NULL);
>  	if (ACPI_FAILURE(status))
> 
> 
>