Index: MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c
===================================================================
--- MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c	(revision 9330)
+++ MdeModulePkg/Universal/Disk/PartitionDxe/Partition.c	(working copy)
@@ -310,8 +310,15 @@
           This->DriverBindingHandle,
           ControllerHandle
           );
+    return Status;
   }
 
+    gBS->CloseProtocol (
+          ControllerHandle,
+          &gEfiDiskIoProtocolGuid,
+          This->DriverBindingHandle,
+          ControllerHandle
+          );
   return Status;
 }