linux-kernel - Re: [PATCH] libata: Handle bay devices in dock stations

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Message-ID: <4845937E.7040902@garzik.org>
Date:	Tue, 03 Jun 2008 14:54:54 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Matthew Garrett <mjg59@...f.ucam.org>
CC:	linux-kernel@...r.kernel.org, Tejun Heo <htejun@...il.com>,
	linux-ide@...r.kernel.org, linux-acpi@...r.kernel.org,
	akpm@...ux-foundation.org
Subject: Re: [PATCH] libata: Handle bay devices in dock stations

Matthew Garrett wrote:
> On Tue, Jun 03, 2008 at 08:27:59PM +0200, Holger Macht wrote:
>> * Differentiate between bay devices in dock stations and others:
>>
>>  - When an ACPI_NOTIFY_EJECT_REQUEST appears, just signal uevent to
>>    userspace (that is when the optional eject button on a bay device is
>>    pressed/pulled) giving the possibility to unmount file systems and to
>>    clean up. Also, only send uevent in case we get an EJECT_REQUEST
>>    without doing anything else. In other cases, you'll get an add/remove
>>    event because libata attaches/detaches the device.
>>
>>  - In case of a dock event, which in turn signals an
>>    ACPI_NOTIFY_EJECT_REQUEST, immediately detach the device, because it
>>    may already have been gone
>>
>> * In case of an ACPI_NOTIFY_DEVICE/BUS_CHECK, evaluate _STA to check if
>>   the device has been plugged or unplugged. If plugged, hotplug it, if
>>   unplugged, just signal event to userspace
>>   (initial patch by Matthew Garrett <mjg59@...f.ucam.org>)
>>
>> * Call ACPI _EJ0 for detached devices
>>
>> Signed-off-by: Holger Macht <hmacht@...e.de>
> 
> Acked-by: Matthew Garrett <mjg@...hat.com>

thanks, both!


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