Intel Extensible Firmware Interface - Manual (Page 268)

Extensible Firmware Interface Specification
9-26 12/01/02 Version 1.10
Status Codes Returned
EFI_SUCCESS The driver override for ControllerHandle was returned in
DriverImageHandle .
EFI_NOT_FOUND A driver override for ControllerHandle was not found.
EFI_INVALID_PARAMETER The handle specified by ControllerHandle is not a valid handle.
EFI_INVALID_PARAMETER DriverImageHandle is not a handle that was returned on a
previous call to GetDriver() .