From 486b908d4412510d66ee348ba765de8d93441345 Mon Sep 17 00:00:00 2001
From: Ping Cheng <pinglinux@gmail.com>
Date: Fri, 20 Feb 2015 14:25:58 -0800
Subject: [PATCH] HID: wacom: do not send pen events before touch is up/forced
 out

If pen comes in proximity while touch is down, we force touch up
before sending pen events. Otherwise, there can be unfinished
touch events compete with pen events. This idea has been fully
implemented for Tablet PCs. But other tablets that support both
pen and touch are not fully considered.

Signed-off-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/wacom_wac.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index 046351cf17f3..69827c928e50 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -554,6 +554,9 @@ static int wacom_intuos_inout(struct wacom_wac *wacom)
 	if (features->quirks & WACOM_QUIRK_MULTI_INPUT)
 		wacom->shared->stylus_in_proximity = true;
 
+	if (wacom->shared->touch_down)
+		return 1;
+
 	/* in Range while exiting */
 	if (((data[1] & 0xfe) == 0x20) && wacom->reporting_data) {
 		input_report_key(input, BTN_TOUCH, 0);
@@ -1759,6 +1762,9 @@ static int wacom_bpt_pen(struct wacom_wac *wacom)
 		return 0;
 	}
 
+	if (wacom->shared->touch_down)
+		return 0;
+
 	prox = (data[1] & 0x20) == 0x20;
 
 	/*
-- 
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