linux-kernel - Re: [PATCH] HID: logitech-dj: add support for the new lightspeed connection iteration

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Date:   Tue, 9 Feb 2021 10:37:34 +0100 (CET)
From:   Jiri Kosina <jikos@...nel.org>
To:     Filipe Laíns <lains@...hlinux.org>
cc:     Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Filipe Laíns <lains@...eup.net>
Subject: Re: [PATCH] HID: logitech-dj: add support for the new lightspeed
 connection iteration

On Sat, 23 Jan 2021, Filipe Laíns wrote:

> From: Filipe Laíns <lains@...eup.net>
> 
> This new connection type is the new iteration of the Lightspeed
> connection and will probably be used in some of the newer gaming
> devices. It is currently use in the G Pro X Superlight.
> 
> This patch should be backported to older versions, as currently the
> driver will panic when seing the unsupported connection. This isn't
> an issue when using the receiver that came with the device, as Logitech
> has been using different PIDs when they change the connection type, but
> is an issue when using a generic receiver (well, generic Lightspeed
> receiver), which is the case of the one in the Powerplay mat. Currently,
> the only generic Ligthspeed receiver we support, and the only one that
> exists AFAIK, is ther Powerplay.
> 
> As it stands, the driver will panic when seeing a G Pro X Superlight
> connected to the Powerplay receiver and won't send any input events to
> userspace! The kernel will warn about this so the issue should be easy
> to identify, but it is still very worrying how hard it will fail :(

Applied to for-5.11/upstream-fixes, thanks Filipe.

-- 
Jiri Kosina
SUSE Labs