linux-kernel - Re: [PATCH v1 2/4] ACPI: scan: Relocate acpi_bus_trim

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Message-ID: <20240222170907.00000afa@Huawei.com>
Date: Thu, 22 Feb 2024 17:09:07 +0000
From: Jonathan Cameron <Jonathan.Cameron@...wei.com>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>
CC: Linux ACPI <linux-acpi@...r.kernel.org>, LKML
	<linux-kernel@...r.kernel.org>, Mika Westerberg
	<mika.westerberg@...ux.intel.com>, "Rafael J. Wysocki" <rafael@...nel.org>,
	"Russell King (Oracle)" <linux@...linux.org.uk>
Subject: Re: [PATCH v1 2/4] ACPI: scan: Relocate acpi_bus_trim_one()

On Wed, 21 Feb 2024 21:01:48 +0100
"Rafael J. Wysocki" <rjw@...ysocki.net> wrote:

> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> 
> Relocate acpi_bus_trim_one() (without modifications) so as to avoid the
> need to add a forward declaration of it in a subsequent patch.
> 
> No functional changes.
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
FWIW you indeed moved the code :)

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

> ---
>  drivers/acpi/scan.c |   52 ++++++++++++++++++++++++++--------------------------
>  1 file changed, 26 insertions(+), 26 deletions(-)
> 
> Index: linux-pm/drivers/acpi/scan.c
> ===================================================================
> --- linux-pm.orig/drivers/acpi/scan.c
> +++ linux-pm/drivers/acpi/scan.c
> @@ -244,6 +244,32 @@ static int acpi_scan_try_to_offline(stru
>  	return 0;
>  }
>  
> +static int acpi_bus_trim_one(struct acpi_device *adev, void *not_used)
> +{
> +	struct acpi_scan_handler *handler = adev->handler;
> +
> +	acpi_dev_for_each_child_reverse(adev, acpi_bus_trim_one, NULL);
> +
> +	adev->flags.match_driver = false;
> +	if (handler) {
> +		if (handler->detach)
> +			handler->detach(adev);
> +
> +		adev->handler = NULL;
> +	} else {
> +		device_release_driver(&adev->dev);
> +	}
> +	/*
> +	 * Most likely, the device is going away, so put it into D3cold before
> +	 * that.
> +	 */
> +	acpi_device_set_power(adev, ACPI_STATE_D3_COLD);
> +	adev->flags.initialized = false;
> +	acpi_device_clear_enumerated(adev);
> +
> +	return 0;
> +}
> +
>  static int acpi_scan_hot_remove(struct acpi_device *device)
>  {
>  	acpi_handle handle = device->handle;
> @@ -2547,32 +2573,6 @@ int acpi_bus_scan(acpi_handle handle)
>  }
>  EXPORT_SYMBOL(acpi_bus_scan);
>  
> -static int acpi_bus_trim_one(struct acpi_device *adev, void *not_used)
> -{
> -	struct acpi_scan_handler *handler = adev->handler;
> -
> -	acpi_dev_for_each_child_reverse(adev, acpi_bus_trim_one, NULL);
> -
> -	adev->flags.match_driver = false;
> -	if (handler) {
> -		if (handler->detach)
> -			handler->detach(adev);
> -
> -		adev->handler = NULL;
> -	} else {
> -		device_release_driver(&adev->dev);
> -	}
> -	/*
> -	 * Most likely, the device is going away, so put it into D3cold before
> -	 * that.
> -	 */
> -	acpi_device_set_power(adev, ACPI_STATE_D3_COLD);
> -	adev->flags.initialized = false;
> -	acpi_device_clear_enumerated(adev);
> -
> -	return 0;
> -}
> -
>  /**
>   * acpi_bus_trim - Detach scan handlers and drivers from ACPI device objects.
>   * @adev: Root of the ACPI namespace scope to walk.
> 
> 
>