linux-kernel - Re: [PATCH 8/9] Input: Block suspend while event queue is not empty.

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Message-ID: <z2wd6200be21004232202me5d59908y25bf9523fd62edce@mail.gmail.com>
Date:	Fri, 23 Apr 2010 22:02:50 -0700
From:	Arve Hjønnevåg <arve@...roid.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	Randy Dunlap <randy.dunlap@...cle.com>,
	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	Thadeu Lima de Souza Cascardo <cascardo@...oscopio.com>,
	Márton Németh <nm127@...email.hu>,
	Sven Neumann <s.neumann@...mfeld.com>,
	Tero Saarni <tero.saarni@...il.com>,
	Henrik Rydberg <rydberg@...omail.se>,
	Matthew Garrett <mjg@...hat.com>,
	Jiri Kosina <jkosina@...e.cz>, linux-input@...r.kernel.org
Subject: Re: [PATCH 8/9] Input: Block suspend while event queue is not empty.

On Fri, Apr 23, 2010 at 2:08 PM, Dmitry Torokhov
<dmitry.torokhov@...il.com> wrote:
> On Friday 23 April 2010 01:56:25 pm Randy Dunlap wrote:
>> On Thu, 22 Apr 2010 18:08:57 -0700 Arve Hjønnevåg wrote:
>> > Add an ioctl, EVIOCSSUSPENDBLOCK, to enable a suspend_blocker that will
>> > block suspend while the event queue is not empty. This allows userspace
>> > code to process input events while the device appears to be asleep.
>>
>> All new ioctls need to be added to Documentation/ioctl/ioctl-number.txt,
>> please.
>
> I do not see the reason for it to be in the kernel still. Have a process
> that listens to all input devices (or subset of them), once events stop
> coming initiate suspend.
>

I think the document added by the first patch explains this. The
solution you propose above will ignore a wakeup key pressed right
after user space decides to initiate suspend.

-- 
Arve Hjønnevåg
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