1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 3d2e6bbb004..9c7415ff4aa 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -121,6 +121,7 @@ struct mt_device {
 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS      0x0109
 
 #define MT_DEFAULT_MAXCONTACT   10
+#define MT_MAX_MAXCONTACT       250
 
 #define MT_USB_DEVICE(v, p)     HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
 #define MT_BT_DEVICE(v, p)      HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
@@ -282,6 +283,9 @@ static void mt_feature_mapping(struct hid_device *hdev,
         case HID_DG_CONTACTMAX:
                 td->maxcontact_report_id = field->report->id;
                 td->maxcontacts = field->value[0];
+                if (!td->maxcontacts &&
+                    field->logical_maximum <= MT_MAX_MAXCONTACT)
+                        td->maxcontacts = field->logical_maximum;
                 if (td->mtclass.maxcontacts)
                         /* check if the maxcontacts is given by the class */
                         td->maxcontacts = td->mtclass.maxcontacts;