linux-kernel - Re: [PATCH] ACPI : Implement ACPI_NOTIFY_EJECT

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Message-ID: <4FD6D492.504@jp.fujitsu.com>
Date:	Tue, 12 Jun 2012 14:33:06 +0900
From:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
To:	lenb@...nel.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ACPI  : Implement ACPI_NOTIFY_EJECT_REQUEST for ACPI
 container

Please ignore the patch.
I found that ACPI container driver does not need to implement EJECT routine
because it has already prepared eject file at userland.

2012/06/05 15:26, Yasuaki Ishimatsu wrote:
> Even if ACPI_NOTIFY_EJECT_REQUEST is notified to ACPI container, ACPI
> container just calls kobject_uevent(). The patch implements a function
> to remove all devices included in ACPI container.
> 
> Signed-off-by: Yasuaki Ishimatsu<isimatu.yasuaki@...fujitsu.com>
> 
> ---
>   drivers/acpi/container.c |   32 ++++++++++++++++++++++++++++++--
>   1 file changed, 30 insertions(+), 2 deletions(-)
> 
> Index: linux-3.5-rc1/drivers/acpi/container.c
> ===================================================================
> --- linux-3.5-rc1.orig/drivers/acpi/container.c	2012-06-05 14:01:54.000000000 +0900
> +++ linux-3.5-rc1/drivers/acpi/container.c	2012-06-05 14:17:40.940836226 +0900
> @@ -123,6 +123,8 @@ static int acpi_container_remove(struct
>   	acpi_status status = AE_OK;
>   	struct acpi_container *pc = NULL;
> 
> +	kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
> +
>   	pc = acpi_driver_data(device);
>   	kfree(pc);
>   	return status;
> @@ -152,6 +154,32 @@ static int container_device_add(struct a
>   	return result;
>   }
> 
> +static void container_device_remove(struct acpi_device *device,
> +				    acpi_handle handle)
> +{
> +	struct acpi_object_list arg_list;
> +	union acpi_object arg;
> +	int result;
> +	acpi_status status;
> +
> +	result = acpi_bus_trim(device, 1);
> +	if (result) {
> +		printk(KERN_WARNING "Removing contaier failed");
> +		return;
> +	}
> +
> +	arg_list.count = 1;
> +	arg_list.pointer =&arg;
> +	arg.type = ACPI_TYPE_INTEGER;
> +	arg.integer.value = 1;
> +
> +	status = acpi_evaluate_object(handle, "_EJ0",&arg_list, NULL);
> +	if (ACPI_FAILURE(status))
> +		printk(KERN_WARNING "Eject device failed\n");
> +
> +	return;
> +}
> +
>   static void container_notify_cb(acpi_handle handle, u32 type, void *context)
>   {
>   	struct acpi_device *device = NULL;
> @@ -183,13 +211,13 @@ static void container_notify_cb(acpi_han
>   		} else {
>   			if (ACPI_SUCCESS(status)) {
>   				/* device exist and this is a remove request */
> -				kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
> +				container_device_remove(device, handle);
>   			}
>   		}
>   		break;
>   	case ACPI_NOTIFY_EJECT_REQUEST:
>   		if (!acpi_bus_get_device(handle,&device)&&  device) {
> -			kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
> +			container_device_remove(device, handle);
>   		}
>   		break;
>   	default:
> 
> --
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> 
> 


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