linux-kernel - Re: [PATCH v11 00/19] input: cyapa: instruction of cyapa patches

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Date:	Fri, 21 Nov 2014 00:56:11 -0800
From:	Jeremiah Mahler <jmmahler@...il.com>
To:	Dudley Du <dudley.dulixin@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v11 00/19] input: cyapa: instruction of cyapa patches

Dudley,

On Wed, Nov 19, 2014 at 04:37:32PM +0800, Dudley Du wrote:
> V11 patches have below main updates compared with v10 patches:
> 1) Add add acpi device id supported for old gen3 and new gen5 trackpad devices.
> 2) Fix the unable to update firmware issue when cyapa_open is not called
>    which means the irq for firwmare update process is not enabled. This fix
[]

I am having a problem with an older patch which is currently in
linux-next (20141120) and which might be related to this new patch set.

On an Acer C720 if a suspend and resume is performed the touchpad will
stop working.  If the cyapa driver is reloaded it will begin working
again.

I performed a bisect and found that the following patch was the cause.

  From b1cfa7b4388285c0f0b486f152ab0cb18612c779 Mon Sep 17 00:00:00 2001
  From: Dudley Du <dudley.dulixin@...il.com>
  Date: Sun, 9 Nov 2014 12:36:34 -0800
  Subject: [PATCH] Input: cyapa - switch to using managed resources

  Use of managed resources simplifies error handling and device removal
  code.

  Signed-off-by: Dudley Du <dudl@...ress.com>
  [Dmitry: added open/close methods so cyapa_remove is no longer needed.]
  Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>

If I can provide any other information that would be of help let me know.
I will try out your new patchset if I get a chance.

-- 
- Jeremiah Mahler
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