linux-kernel - Re: [PATCH 1/2] ACPI: reintroduce acpi_device

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Message-Id: <20090630141047.c8c79b0b.akpm@linux-foundation.org>
Date:	Tue, 30 Jun 2009 14:10:47 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	David Härdeman <david@...deman.nu>
Cc:	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
	linux-input@...r.kernel.org, jbarnes@...tuousgeek.org,
	david@...deman.nu, Bjorn Helgaas <bjorn.helgaas@...com>,
	Len Brown <lenb@...nel.org>
Subject: Re: [PATCH 1/2] ACPI: reintroduce acpi_device_ops .shutdown method

On Sat, 27 Jun 2009 07:18:31 +0200
David H__rdeman <david@...deman.nu> wrote:

> This reintroduces the .shutdown method which is used by the
> winbond-cir driver. A normal revert wasn't possible since there
> had been other changes to include/acpi/acpi_bus.h since.
> 
> Signed-off-by: David H__rdeman <david@...deman.nu>
> ---
>  drivers/acpi/scan.c     |   12 ++++++++++++
>  include/acpi/acpi_bus.h |    2 ++
>  2 files changed, 14 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
> index 781435d..c94ab13 100644
> --- a/drivers/acpi/scan.c
> +++ b/drivers/acpi/scan.c
> @@ -464,10 +464,22 @@ static int acpi_device_remove(struct device * dev)
>  	return 0;
>  }
>  
> +static void acpi_device_shutdown(struct device *dev)
> +{
> +	struct acpi_device *acpi_dev = to_acpi_device(dev);
> +	struct acpi_driver *acpi_drv = acpi_dev->driver;
> +
> +	if (acpi_drv && acpi_drv->ops.shutdown)
> +		acpi_drv->ops.shutdown(acpi_dev);
> +
> +	return ;
> +}
> +
>  struct bus_type acpi_bus_type = {
>  	.name		= "acpi",
>  	.suspend	= acpi_device_suspend,
>  	.resume		= acpi_device_resume,
> +	.shutdown	= acpi_device_shutdown,
>  	.match		= acpi_bus_match,
>  	.probe		= acpi_device_probe,
>  	.remove		= acpi_device_remove,
> diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
> index c65e4ce..52da89a 100644
> --- a/include/acpi/acpi_bus.h
> +++ b/include/acpi/acpi_bus.h
> @@ -96,6 +96,7 @@ typedef int (*acpi_op_resume) (struct acpi_device * device);
>  typedef int (*acpi_op_bind) (struct acpi_device * device);
>  typedef int (*acpi_op_unbind) (struct acpi_device * device);
>  typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
> +typedef int (*acpi_op_shutdown) (struct acpi_device * device);
>  
>  struct acpi_bus_ops {
>  	u32 acpi_op_add:1;
> @@ -112,6 +113,7 @@ struct acpi_device_ops {
>  	acpi_op_bind bind;
>  	acpi_op_unbind unbind;
>  	acpi_op_notify notify;
> +	acpi_op_shutdown shutdown;
>  };
>  
>  #define ACPI_DRIVER_ALL_NOTIFY_EVENTS	0x1	/* system AND device events */

Len, Bjorn: is this OK?  Or is there some other mechanism which the
driver should have used?

Thanks.
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