From 34a39a59bccd6d0831a4b1d9c4d63625adbef44e Mon Sep 17 00:00:00 2001
From: Oscar Campos <oscar.campos@member.fsf.org>
Date: Tue, 18 Jul 2017 17:20:36 -0700
Subject: [PATCH] Input: trackpoint - assume 3 buttons when buttons detection
 fails

commit 293b915fd9bebf33cdc906516fb28d54649a25ac upstream.

Trackpoint buttons detection fails on ThinkPad 570 and 470 series,
this makes the middle button of the trackpoint to not being recogized.
As I don't believe there is any trackpoint with less than 3 buttons this
patch just assumes three buttons when the extended button information
read fails.

Signed-off-by: Oscar Campos <oscar.campos@member.fsf.org>
Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
Reading git-format-patch failed