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-rw-r--r--drivers/hid/hid-multitouch.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index c02d4cad1893..1565a307170a 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -641,6 +641,13 @@ static void mt_store_field(struct hid_device *hdev,
if (*target != DEFAULT_TRUE &&
*target != DEFAULT_FALSE &&
*target != DEFAULT_ZERO) {
+ if (usage->contactid == DEFAULT_ZERO ||
+ usage->x == DEFAULT_ZERO ||
+ usage->y == DEFAULT_ZERO) {
+ hid_dbg(hdev,
+ "ignoring duplicate usage on incomplete");
+ return;
+ }
usage = mt_allocate_usage(hdev, application);
if (!usage)
return;