[PATCH 2/3] HID: hid-multitouch: support arrays for the split of the touches in a report

["benjamin.tissoires" <benjamin.tissoires@gmail.com>]

From: Benjamin Tissoires <benjamin.tissoires@enac.fr>

Win8 certification introduced the ability to transmit two X and two Y per
touch. The specification precises that it must be in an array, with a
report count == 2.

This test guarantees that we split the touches on the last element
in this array.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
---
 drivers/hid/hid-multitouch.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 9a3891e..a5ef877 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -601,7 +601,10 @@ static int mt_event(struct hid_device *hid, struct hid_field *field,
 			return 0;
 		}
 
-		if (usage->hid == td->last_slot_field)
+		if (usage->hid == td->last_slot_field &&
+			usage == &field->usage[field->maxusage - 1])
+			/* we only take into account the last report
+			 * of a field if report_count > 1 */
 			mt_complete_slot(td);
 
 		if (field->index == td->last_field_index
-- 
1.7.10.2