1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 6a9b05b328a9..7c811252c1ce 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -778,9 +778,16 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
         /*
          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
          * for the stylus.
+         * The check for mt_report_id ensures we don't process
+         * HID_DG_CONTACTCOUNT from the pen report as it is outside the physical
+         * collection, but within the report ID.
          */
         if (field->physical == HID_DG_STYLUS)
                 return 0;
+        else if ((field->physical == 0) &&
+                 (field->report->id != td->mt_report_id) &&
+                 (td->mt_report_id != -1))
+                return 0;
 
         if (field->application == HID_DG_TOUCHSCREEN ||
             field->application == HID_DG_TOUCHPAD)