linux-kernel - Re: [PATCH 2/2] Input: tsc2007: do I2C transfers in non-interrupt context

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Message-ID: <483a38b80905111840k6b7e7aaao9b70f17753bebada@mail.gmail.com>
Date:	Tue, 12 May 2009 10:40:38 +0900
From:	Kwangwoo Lee <kwangwoo.lee@...il.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	Thierry Reding <thierry.reding@...onic-design.de>,
	Trilok Soni <soni.trilok@...il.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org
Subject: Re: [PATCH 2/2] Input: tsc2007: do I2C transfers in non-interrupt 
	context

Hi,

On Tue, May 12, 2009 at 12:41 AM, Dmitry Torokhov
<dmitry.torokhov@...il.com> wrote:
> On Mon, May 11, 2009 at 08:38:09AM -0700, Dmitry Torokhov wrote:
>> Hi,
>> On Mon, May 11, 2009 at 08:44:00PM +0900, Kwangwoo Lee wrote:
>> > From d5de0d22109de7564f9bf1df688acbe6b18f41db Mon Sep 17 00:00:00 2001
>> > From: Kwangwoo Lee <kwangwoo.lee@...il.com>
>> > Date: Mon, 11 May 2009 20:05:50 +0900
>> > Subject: [PATCH 2/2] Input: tsc2007: do I2C transfers in non-interrupt context.
>> >
>> > This patch enhances pointer movements much smoother.
>> > The original patch is written by Thierry.
>> >
>> > --- a/drivers/input/touchscreen/tsc2007.c
>> > +++ b/drivers/input/touchscreen/tsc2007.c
>> > @@ -70,6 +70,7 @@ struct ts_event {
>> >  struct tsc2007 {
>> >     struct input_dev        *input;
>> >     char                    phys[32];
>> > +   struct work_struct      work;
>>
>> Every time I see a work_struct in a driver and don't see
>> cancel_work_sync() anywhere I know there are issues...
>>

Thanks for your comment. I also missed that thing, sorry.

> Also, why do we need to chain irq->timer->work now? Surely we can bypass
> the timer if we have to read in process context.

It's good point. I'll check again.
Thanks.

-- 
Kwangwoo Lee <kwangwoo.lee@...il.com>
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