4.14-stable review patch. If anyone has any objections, please let me know.
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From: Jiri Kosina jkosina@suse.cz
[ Upstream commit 9abd04af951e5734c9d5cfee9b49790844b734cf ]
ELO devices have one Button usage in GenDesk field, which makes hid-input map it to BTN_LEFT; that confuses userspace, which then considers the device to be a mouse/touchpad instead of touchscreen.
Fix that by unmapping BTN_LEFT and keeping only BTN_TOUCH in place.
Signed-off-by: Jiri Kosina jkosina@suse.cz Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/hid/hid-elo.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/drivers/hid/hid-elo.c +++ b/drivers/hid/hid-elo.c @@ -42,6 +42,12 @@ static int elo_input_configured(struct h { struct input_dev *input = hidinput->input;
+ /* + * ELO devices have one Button usage in GenDesk field, which makes + * hid-input map it to BTN_LEFT; that confuses userspace, which then + * considers the device to be a mouse/touchpad instead of touchscreen. + */ + clear_bit(BTN_LEFT, input->keybit); set_bit(BTN_TOUCH, input->keybit); set_bit(ABS_PRESSURE, input->absbit); input_set_abs_params(input, ABS_PRESSURE, 0, 256, 0, 0);