linux-kernel - Re: [PATCH v1 1/1] platform/surface: Switch to use acpi_evaluate_dsm

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Date:   Mon, 23 Jan 2023 16:55:15 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Maximilian Luz <luzmaximilian@...il.com>,
        Mark Gross <markgross@...nel.org>
Subject: Re: [PATCH v1 1/1] platform/surface: Switch to use
 acpi_evaluate_dsm_typed()

Hi Andy,

On 1/18/23 10:38, Andy Shevchenko wrote:
> The acpi_evaluate_dsm_typed() provides a way to check the type of the
> object evaluated by _DSM call. Use it instead of open coded variant.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Thank you for the 3 patches switching to acpi_evaluate_dsm_typed().
I have added all 3 to my review-hans  branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans

Regards,

Hans


> ---
>  drivers/platform/surface/surface_hotplug.c | 13 +++----------
>  1 file changed, 3 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/platform/surface/surface_hotplug.c b/drivers/platform/surface/surface_hotplug.c
> index f004a2495201..7b6d887dccdb 100644
> --- a/drivers/platform/surface/surface_hotplug.c
> +++ b/drivers/platform/surface/surface_hotplug.c
> @@ -101,18 +101,12 @@ static void shps_dsm_notify_irq(struct platform_device *pdev, enum shps_irq_type
>  	param.type = ACPI_TYPE_INTEGER;
>  	param.integer.value = value;
>  
> -	result = acpi_evaluate_dsm(handle, &shps_dsm_guid, SHPS_DSM_REVISION,
> -				   shps_dsm_fn_for_irq(type), &param);
> -
> +	result = acpi_evaluate_dsm_typed(handle, &shps_dsm_guid, SHPS_DSM_REVISION,
> +					 shps_dsm_fn_for_irq(type), &param, ACPI_TYPE_BUFFER);
>  	if (!result) {
>  		dev_err(&pdev->dev, "IRQ notification via DSM failed (irq=%d, gpio=%d)\n",
>  			type, value);
>  
> -	} else if (result->type != ACPI_TYPE_BUFFER) {
> -		dev_err(&pdev->dev,
> -			"IRQ notification via DSM failed: unexpected result type (irq=%d, gpio=%d)\n",
> -			type, value);
> -
>  	} else if (result->buffer.length != 1 || result->buffer.pointer[0] != 0) {
>  		dev_err(&pdev->dev,
>  			"IRQ notification via DSM failed: unexpected result value (irq=%d, gpio=%d)\n",
> @@ -121,8 +115,7 @@ static void shps_dsm_notify_irq(struct platform_device *pdev, enum shps_irq_type
>  
>  	mutex_unlock(&sdev->lock[type]);
>  
> -	if (result)
> -		ACPI_FREE(result);
> +	ACPI_FREE(result);
>  }
>  
>  static irqreturn_t shps_handle_irq(int irq, void *data)