Input: wacom - don't retrieve touch_max when it is predefined
Some models, such as 0xE6, report more fingers than we process.
Reported-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Ping Cheng <pingc@wacom.com>
Tested-by: Nils Kanning <nils@kanning.de>
Tested-by: Rafi Rubin <rafi@seas.upenn.edu>
Reviewed-by: Jason Gerecke <killertofu@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c
index 23a933d..b145841 100644
--- a/drivers/input/tablet/wacom_sys.c
+++ b/drivers/input/tablet/wacom_sys.c
@@ -398,7 +398,9 @@
break;
case HID_USAGE_CONTACTMAX:
- wacom_retrieve_report_data(intf, features);
+ /* leave touch_max as is if predefined */
+ if (!features->touch_max)
+ wacom_retrieve_report_data(intf, features);
i++;
break;
}