linux-kernel - Re: Crash caused by hid-rmi and no longer working touchscreen

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Message-ID: <alpine.LSU.2.20.1704101515380.28004@cbobk.fhfr.pm>
Date:   Mon, 10 Apr 2017 15:18:03 +0200 (CEST)
From:   Jiri Kosina <jikos@...nel.org>
To:     Gabriele Mazzotta <gabriele.mzt@...il.com>
cc:     aduggan@...aptics.com, benjamin.tissoires@...hat.com,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-input@...r.kernel.org,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Peter Hutterer <peter.hutterer@...-t.net>,
        Cameron Gutman <aicommander@...il.com>,
        Thorsten Leemhuis <linux@...mhuis.info>,
        Nick Dyer <nick@...anahar.org>,
        Christopher Heiny <cheiny@...aptics.com>
Subject: Re: Crash caused by hid-rmi and no longer working touchscreen


[ a couple more people from "the other regression thread" added to CC ]

On Mon, 10 Apr 2017, Gabriele Mazzotta wrote:

> Hi,
> 
> I'm having troubles with hid-rmi using 4.11-rc6. I'm getting some
> "rmi_hid_read_block: timeout elapsed" errors and ultimately the
> crash you can see at the end of this mail. I will reply to this
> mail with a full log that shows all the errors.
> 
> The problem seems to be caused by commit 279967a65b320d174a507498ae
> ("HID: rmi: Handle all Synaptics touchpads using hid-rmi").
> 
> My laptop has a Synaptics touchpad and a Synaptics touchscreen.
> Because of that commit, hid-rmi is used for both the devices, while
> it has always been used only for the touchpad. Needless to say that
> the touchscreen no longer works.
> 
> If I revert that commit, everything goes back to normal.

Alright, given this is a second regression cause by this switch, I suggest 
to revert this one for 4.11 still, and work on fixing this properly for 
4.12.

If noone raises any objections (a few more people added to Cc), I'll queue 
a 4.11-rc revert tomorrow.

-- 
Jiri Kosina
SUSE Labs