linux-kernel - Re: [REGRESSION] panic with Wacom One Tablet on 4.4.x kernel

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Message-ID: <20160324144304.GB7602@mail.corp.redhat.com>
Date:	Thu, 24 Mar 2016 15:43:04 +0100
From:	Benjamin Tissoires <benjamin.tissoires@...hat.com>
To:	Jiri Kosina <jikos@...nel.org>
Cc:	Ping Cheng <pinglinux@...il.com>,
	Laura Abbott <labbott@...hat.com>,
	Ping Cheng <pingc@...om.com>,
	Jason Gerecke <jason.gerecke@...om.com>,
	linux-input <linux-input@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [REGRESSION] panic with Wacom One Tablet on 4.4.x kernel

On Mar 24 2016 or thereabouts, Jiri Kosina wrote:
> On Wed, 16 Mar 2016, Ping Cheng wrote:
> 
> > Yes, please provide a bisect report so we get a clue.
> > 
> > I do not have a "Wacom One". I have a Wacom Bamboo Pen, which goes 
> > through the same code base as "Wacom One". I tested kernel 4.4.4. I 
> > don't see the issue.
> 
> Laura, do we have any result from the bisect please?
> 

Well, there are two users with the problem, one on Arch (reported
through linuxwacom[1]) and one on Fedora[2] that Laura mentioned. If you look
at the Fedora bug, you'll see that I found an issue in the wacom driver
that fixes the crash, and seems to make the Fedora user happy. However,
the same patch is not sufficient for the Arch user, and we are trying to
get to it in the meantime.
I think I can safely send the fix for the oops now, but we need some
clarifications on the linuxwacom issues we are seeing.

[1] https://sourceforge.net/p/linuxwacom/bugs/311/
[2] https://bugzilla.redhat.com/show_bug.cgi?id=1317116

Cheers,
Benjamin