https://bugzilla.tianocore.org/show_bug.cgi?id=510 The commit fills the 'Interval' field of the Endpoint Context data for isochronous endpoints. It will resolve the error when a Configure Endpoint Command is sent to an isochronous endpoint. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Hao Wu <hao.a.wu@intel.com> Reviewed-by: Star Zeng <star.zeng@intel.com>