The previous version was only checking if the Remaining Device Path node was a MemMap DevicePath node. This fix also checks if the Root DevicePath node is a MemMap DevicePath node. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12315 6f19259b-4bc3-4df7-8a09-765794883524