[PATCH evdev] Only map x and y to axes 0 and 1

[Keith Packard]

Peter Hutterer <peter.hutterer at who-t.net> writes:

> The Logitech G600 has one device with all axes north of ABS_MISC. The current
> code assigns ABS_MISC as first axis to map to axis 0, i.e. x. On button press,
> one node sends the BTN_LEFT but the other node sends an ABS_MISC with a 1 0
> value. ABS_MISC is mapped to axis 0, this moves the pointer to (0, y) on
> every button click.
>
> Avoid this by simply mapping any axis other than x/y to at least axis 3, and
> make sure we only override the MT 0/1 axes when we actually have MT axes.
>
> https://bugs.freedesktop.org/show_bug.cgi?id=92856
>
> Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>

Reviewed-by: Keith Packard <keithp at keithp.com>

(who was surprised that "if (mapping == i) i++;" already existed in the
code for no good reason until now).

-- 
-keith
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