This is a note to let you know that I've just added the patch titled
HID: elo: clear BTN_LEFT mapping
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
hid-elo-clear-btn_left-mapping.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Mon Mar 19 09:58:12 CET 2018
From: Jiri Kosina <jkosina@xxxxxxx>
Date: Wed, 22 Nov 2017 11:19:51 +0100
Subject: HID: elo: clear BTN_LEFT mapping
From: Jiri Kosina <jkosina@xxxxxxx>
[ 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@xxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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);
Patches currently in stable-queue which might be from jkosina@xxxxxxx are
queue-4.4/hid-elo-clear-btn_left-mapping.patch
queue-4.4/hid-clamp-input-to-logical-range-if-no-null-state.patch
queue-4.4/hid-reject-input-outside-logical-range-only-if-null-state-is-set.patch