linux-kernel - [PATCH 4.14 069/115] Input: xen-kbdfront - do not advertise multi-touch pressure support

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Date:   Fri,  2 Mar 2018 09:51:12 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Oleksandr Andrushchenko <oleksandr_andrushchenko@...m.com>,
        Andrii Chepurnyi <andrii_chepurnyi@...m.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.14 069/115] Input: xen-kbdfront - do not advertise multi-touch pressure support

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Oleksandr Andrushchenko <oleksandr_andrushchenko@...m.com>


[ Upstream commit 02a0d9216d4daf6a58d88642bd2da2c78c327552 ]

Some user-space applications expect multi-touch pressure
on contact to be reported if it is advertised in device
properties. Otherwise, such applications may treat reports
not as actual touches, but hovering. Currently this is
only advertised, but not reported.
Fix this by not advertising that ABS_MT_PRESSURE is supported.

Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@...m.com>
Signed-off-by: Andrii Chepurnyi <andrii_chepurnyi@...m.com>
Patchwork-Id: 10140017
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/input/misc/xen-kbdfront.c |    2 --
 1 file changed, 2 deletions(-)

--- a/drivers/input/misc/xen-kbdfront.c
+++ b/drivers/input/misc/xen-kbdfront.c
@@ -326,8 +326,6 @@ static int xenkbd_probe(struct xenbus_de
 				     0, width, 0, 0);
 		input_set_abs_params(mtouch, ABS_MT_POSITION_Y,
 				     0, height, 0, 0);
-		input_set_abs_params(mtouch, ABS_MT_PRESSURE,
-				     0, 255, 0, 0);
 
 		ret = input_mt_init_slots(mtouch, num_cont, INPUT_MT_DIRECT);
 		if (ret) {