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udev: don't assign INPUT_ID_MOUSE to a touchpad/joystick/touchscreen (#8259)

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If a touchpad has MT axes only but not ABS_X/ABS_Y (DualShock 4 controller),
then we hit both the conditions is_touchpad and the later check for
!has_abs_axes here, assigning is_mouse and ID_INPUT_MOUSE later.

This is a bug, we historically only assigned either of of the pointing device
tags ID_INPUT_MOUSE/TOUCHPAD/JOYSTICK/TOUCHSCREEN, never multiple of them.

Note that we cannot just check for has_abs_axes and has_mt_coordinates because
the apple touch mouse has both. We really need to check if the device has
already been assigned something else.

https://bugs.freedesktop.org/show_bug.cgi?id=105050
This commit is contained in:
Peter Hutterer 2018-02-23 18:36:45 +10:00 committed by Zbigniew Jędrzejewski-Szmek
parent 6719ca7211
commit 774ff9ba69
1 changed files with 2 additions and 1 deletions
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3
src/udev/udev-builtin-input_id.c
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@ -233,7 +233,8 @@ static bool test_pointers(struct udev_device *dev,
is_touchscreen = true;
}
if (has_mouse_button &&
if (!is_tablet && !is_touchpad && !is_joystick &&
has_mouse_button &&
(has_rel_coordinates ||
!has_abs_coordinates)) /* mouse buttons and no axis */
is_mouse = true;