The original code doesn't reset the slot when there is device change. It may bring issue on device identification procedure of some SD cards. Cc: Hao Wu <hao.a.wu@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Feng Tian <feng.tian@Intel.com> Reviewed-by: Hao Wu <hao.a.wu@intel.com>