Intel Extensible Firmware Interface - Manual (Page 281)

Protocols — EFI Driver Model
Version 1.10 12/01/02 9-39
Status Codes Returned
EFI_SUCCESS The controller specified by ControllerHandle and
ChildHandle that is being managed by the driver specified by This
has a valid set of configuration options.
EFI_INVALID_PARAMETER ControllerHandle is not a valid EFI_HANDLE .
EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid EFI_HANDLE .
EFI_UNSUPPORTED The driver specified by This is not currently managing the controller
specified by ControllerHandle and ChildHandle .
EFI_DEVICE_ERROR The controller specified by ControllerHandle and
ChildHandle that is being managed by the driver specified by This
has an invalid set of configuration options.