linux-kernel - Re: [Qemu-devel] [PATCH 1/1] ACPI: Call ACPI remove handler when handling ACPI eject event

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Date:	Fri, 21 Oct 2011 09:37:41 +0800
From:	Chen Gong <gong.chen@...ux.intel.com>
To:	qemulist@...il.com
CC:	Gong Chen <clumsycg@...il.com>, pingfank@...ux.vnet.ibm.com,
	aliguori@...ibm.com, seabios@...bios.org, qemu-devel@...gnu.org,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
	shaohua.li@...el.com, dave@...ux.vnet.ibm.com, lenb@...nel.org
Subject: Re: [Qemu-devel] [PATCH 1/1] ACPI: Call ACPI remove handler when
 handling ACPI eject event

于 2011/10/20 17:37, qemulist@...il.com 写道:
> On Wed, Oct 19, 2011 at 09:35:46PM +0800, Gong Chen wrote:
>> On Wed, Oct 19, 2011 at 10:47 AM,<pingfank@...ux.vnet.ibm.com>  wrote:
>>> From: Liu Ping Fan<pingfank@...ux.vnet.ibm.com>
>>>
>>> Call the remove handler for ACPI_NOTIFY_EJECT_REQUEST
>>>
>>> Signed-off-by: Liu Ping Fan<pingfank@...ux.vnet.ibm.com>
>>> ---
>>>   drivers/acpi/bus.c      |    2 +-
>>>   drivers/acpi/scan.c     |    2 +-
>>>   include/acpi/acpi_bus.h |    2 ++
>>>   3 files changed, 4 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
>>> index 437ddbf..d06ec6d 100644
>>> --- a/drivers/acpi/bus.c
>>> +++ b/drivers/acpi/bus.c
>>> @@ -764,7 +764,7 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
>>>                 break;
>>>
>>>         case ACPI_NOTIFY_EJECT_REQUEST:
>>> -               /* TBD */
>>> +               acpi_os_hotplug_execute(acpi_bus_hot_remove_device, handle);
>>>                 break;
>>>
>>>         case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
>>> diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
>>> index 449c556..3b97b61 100644
>>> --- a/drivers/acpi/scan.c
>>> +++ b/drivers/acpi/scan.c
>>> @@ -83,7 +83,7 @@ acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, cha
>>>   }
>>>   static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL);
>>>
>>> -static void acpi_bus_hot_remove_device(void *context)
>>> +void acpi_bus_hot_remove_device(void *context)
>>>   {
>>>         struct acpi_device *device;
>>>         acpi_handle handle = context;
>>> diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
>>> index 6cd5b64..b19c09d 100644
>>> --- a/include/acpi/acpi_bus.h
>>> +++ b/include/acpi/acpi_bus.h
>>> @@ -310,6 +310,8 @@ extern int unregister_acpi_notifier(struct notifier_block *);
>>>
>>>   extern int register_acpi_bus_notifier(struct notifier_block *nb);
>>>   extern void unregister_acpi_bus_notifier(struct notifier_block *nb);
>>> +extern void acpi_bus_hot_remove_device(void *context);
>>> +
>>>   /*
>>>   * External Functions
>>>   */
>>> --
>>> 1.7.4.4
>>>
>>
>> I preferred the patch from Shen before. Here is the link:
>> https://lkml.org/lkml/2011/9/24/15
>> As Bjorn said, "long-term goal to move the hotplug flow out of drivers and into
>> the ACPI core". An arbitrary change in the global level just mess up the codes.
> Got it, thanks. And so will this feature emerge in upstream soon?
>
> Thanks and regards,
> pingfan
> --
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>

It's up to the maintainer, should be Len Brown :-)
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