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REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3418 According to xhci spec, at USB packet level, a Control Transfer consists of multiple transactions partitioned into stages: a setup stage, an optional data stage, and a terminating status stage. If Data Stage does not exist, the Transfer Type flag(TRT) should be No Data Stage. So if data length equals to 0, TRT is set to 0. Cc: Jian J Wang <jian.j.wang@intel.com> Cc: Hao A Wu <hao.a.wu@intel.com> Cc: Ray Ni <ray.ni@intel.com> Signed-off-by: Wenyi Xie <xiewenyi2@huawei.com> Reviewed-by: Hao A Wu <hao.a.wu@intel.com>