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udev: consider a device with BTN_TRIGGER_HAPPY as joystick

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These buttons were added specifically for joysticks with lots of buttons, no
other device should be using them. See kernel commit
cf2f765f18960 "HID: handle joysticks with large number of buttons"

We only test for BTN_TRIGGER_HAPPY (an alias for BTN_TRIGGER_HAPPY1) here, a
device that sets buttons 2 and above but doesn't set 1 is considered buggy.

https://github.com/systemd/systemd/issues/6137

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Peter Hutterer
2017-06-22 09:19:25 +10:00
parent c9fb8c7c4a
commit c874fed348
1 changed files with 1 additions and 0 deletions
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src/udev/udev-builtin-input_id.c
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@@ -206,6 +206,7 @@ static bool test_pointers(struct udev_device *dev,
* rudders/pedals are joystick-like, but buttonless; they have
* other fancy axes */
has_joystick_axes_or_buttons = test_bit(BTN_TRIGGER, bitmask_key) ||
test_bit(BTN_TRIGGER_HAPPY, bitmask_key) ||
test_bit(BTN_A, bitmask_key) ||
test_bit(BTN_1, bitmask_key) ||
test_bit(ABS_RX, bitmask_abs) ||