HID: wacom: generic: Reset events back to zero when pen leaves

As a pen leaves, we need to be sure to reset all events back to zero
so that userspace is able to get the complete pen state when it enters
proximity again.
Signed-off-by: NJason Gerecke <jason.gerecke@wacom.com>
Reviewed-by: NPing Cheng <ping.cheng@wacom.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

drivers/hid/wacom_wac.c

@@ -2218,10 +2218,10 @@ static void wacom_wac_pen_event(struct hid_device *hdev, struct hid_field *field
 		return;
 
 	/* send pen events only when the pen is in range */
-	if (!wacom_wac->hid_data.inrange_state)
-		return;
-
-	input_event(input, usage->type, usage->code, value);
+	if (wacom_wac->hid_data.inrange_state)
+		input_event(input, usage->type, usage->code, value);
+	else if (wacom_wac->shared->stylus_in_proximity && !wacom_wac->hid_data.sense_state)
+		input_event(input, usage->type, usage->code, 0);
 }
 
 static void wacom_wac_pen_pre_report(struct hid_device *hdev,