--- a/drivers/staging/greybus/hid.c
+++ b/drivers/staging/greybus/hid.c
@@ -97,7 +97,7 @@ static int gb_hid_set_report(struct gb_hid *ghid, u8 report_type, u8 report_id,
 {
 	struct gb_hid_set_report_request *request;
 	struct gb_operation *operation;
-	int ret, size = sizeof(*request) + len - 1;
+	int ret, size = sizeof(*request) + len;
 
 	ret = gb_pm_runtime_get_sync(ghid->bundle);
 	if (ret)