linux-kernel - Re: [PATCH] Input: serio - re-add thaw (and add freeze)

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Message-Id: <201002242338.49873.dmitry.torokhov@gmail.com>
Date:	Wed, 24 Feb 2010 23:38:49 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Pavel Machek <pavel@....cz>
Cc:	Alan Jenkins <sourcejedi.lkml@...glemail.com>,
	linux-input@...r.kernel.org,
	"linux-kernel" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Input: serio - re-add thaw (and add freeze)

On Wednesday 24 February 2010 11:03:03 pm Pavel Machek wrote:
> On Tue 2010-02-16 09:22:33, Dmitry Torokhov wrote:
> > On Tue, Feb 16, 2010 at 04:48:30PM +0000, Alan Jenkins wrote:
> > > On 2/4/10, Alan Jenkins <alan-jenkins@...fmail.co.uk> wrote:
> > > > Dmitry Torokhov wrote:
> > > >> On Wed, Feb 03, 2010 at 06:59:54PM +0000, Alan Jenkins wrote:
> > > >>> 633aae2 "Input: i8042 - switch to using dev_pm_ops"
> > > >>> removed handling for PMSG_THAW, causing obscure breakage.
> > > >>> 
> > > >>> It can break if you press keys during hibernation,
> > > >>> which causes subsequent keypresses to be lost -
> > > >>> so you can't cancel s2disk by pressing backspace -
> > > >>> and then just before system poweroff you get
> > > >>> "psmouse.c: Failed to deactivate mouse".
> > > >>> 
> > > >>> So let's add the thaw handler back.
> > > >>> 
> > > >>> Also set the freeze handler.  It looks like PMSG_FREEZE
> > > >>> didn't do anything in the past, but I think that must
> > > >>> have been an oversight.
> > > >> 
> > > >> We do not need to do anything special at freeze time that is why
> > > >> there wasn't freeze handler. And so thaw should be pretty much noop
> > > >> as well.
> > > 
> > > Ok, so I did some more mindless fiddling.  It seems that all it needs
> > > is to call the interrupt handler at thaw time.
> > 
> > Yep, this makes more sense. If you happen to press the key(s) while
> > interrupts are off the keyboard controller becomes "jammed". Your sign
> > off please?
> 
> Dmitry wants your Signed-off-by: line, to easily apply the patch.
>

Pavel, I already have it and it is in mainline.

Thanks.

-- 
Dmitry
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