linux-kernel - Re: [PATCH] HID: i2c-hid: check if device is there before really probing

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Message-ID: <nycvar.YFH.7.76.1805151115540.27054@cbobk.fhfr.pm>
Date:   Tue, 15 May 2018 11:16:03 +0200 (CEST)
From:   Jiri Kosina <jikos@...nel.org>
To:     Dmitry Torokhov <dtor@...gle.com>
cc:     Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Brian Norris <briannorris@...omium.org>,
        Douglas Anderson <dianders@...omium.org>
Subject: Re: [PATCH] HID: i2c-hid: check if device is there before really
 probing

On Wed, 9 May 2018, Dmitry Torokhov wrote:

> From: Dmitry Torokhov <dtor@...omium.org>
> 
> On many Chromebooks touch devices are multi-sourced; the components are
> electrically compatible and one can be freely swapped for another without
> changing the OS image or firmware.
> 
> To avoid bunch of scary messages when device is not actually present in the
> system let's try testing basic communication with it and if there is no
> response terminate probe early with -ENXIO.
> 
> Signed-off-by: Dmitry Torokhov <dtor@...omium.org>

Applied, thanks.

-- 
Jiri Kosina
SUSE Labs