BmExpandMediaDevicePath contains a bug that it uses the uninitialized Handle. Since the function is called when the Handle supports BlockIo or SimpleFileSystem, when there is no SimpleFileSystem installed on the Handle, BlockIo is *guaranteed* to be installed on the Handle. The fix initializes the Handle by locating the BlockIo protocol from the device path. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com> Cc: Jeff Fan <jeff.fan@intel.com> Reviewed-by: Sunny Wang <sunnywang@hpe.com>