linux-kernel - Re: [PATCH v2 6/7] platform: x86: ideapad-laptop: Use ACPI

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Date:   Tue, 19 Oct 2021 16:57:14 +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>,
        Ike Panhc <ike.pan@...onical.com>,
        platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH v2 6/7] platform: x86: ideapad-laptop: Use
 ACPI_COMPANION() directly

Hi,

On 10/13/21 18:13, 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 ideapad_acpi_add() accordingly (no intentional functional
> impact).
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.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.  No other changes.
> 
> ---
>  drivers/platform/x86/ideapad-laptop.c |    8 ++------
>  1 file changed, 2 insertions(+), 6 deletions(-)
> 
> Index: linux-pm/drivers/platform/x86/ideapad-laptop.c
> ===================================================================
> --- linux-pm.orig/drivers/platform/x86/ideapad-laptop.c
> +++ linux-pm/drivers/platform/x86/ideapad-laptop.c
> @@ -1534,17 +1534,13 @@ static void ideapad_check_features(struc
>  
>  static int ideapad_acpi_add(struct platform_device *pdev)
>  {
> +	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
>  	struct ideapad_private *priv;
> -	struct acpi_device *adev;
>  	acpi_status status;
>  	unsigned long cfg;
>  	int err, i;
>  
> -	err = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
> -	if (err)
> -		return -ENODEV;
> -
> -	if (eval_int(adev->handle, "_CFG", &cfg))
> +	if (!adev || eval_int(adev->handle, "_CFG", &cfg))
>  		return -ENODEV;
>  
>  	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
> 
> 
>