Intel Extensible Firmware Interface - Manual (Page 259)

Protocols — EFI Driver Model
Version 1.10 12/01/02 9-17
if (EFI_ERROR (Status)) {
goto ErrorExit;
}
ZeroMem (AbcDevice, sizeof (EFI_ABC_DEVICE));
//
// Initialize the contents of the private data structure for the Abc device.
// This includes the XyzIo protocol instance and other private data fields
// and the EFI_ABC_IO_PROTOCOL instance that will be installed.
//
AbcDevice->Signature = EFI_ABC_DEVICE_SIGNATURE;
AbcDevice->XyzIo = XyzIo;
AbcDevice->PrivateData1 = PrivateValue1;
AbcDevice->PrivateData2 = PrivateValue2;
. . .
AbcDevice->PrivateDataN = PrivateValueN;
AbcDevice->AbcIo.Revision = EFI_ABC_IO_PROTOCOL_REVISION;
AbcDevice->AbcIo.Func1 = AbcIoFunc1;
AbcDevice->AbcIo.Func2 = AbcIoFunc2;
. . .
AbcDevice->AbcIo.FuncN = AbcIoFuncN;
AbcDevice->AbcIo.Data1 = Value1;
AbcDevice->AbcIo.Data2 = Value2;
. . .
AbcDevice->AbcIo.DataN = ValueN;
//
// Install protocol interfaces for the ABC I/O device.
//
Status = gBS->InstallMultipleProtocolInterfaces (
&ControllerHandle,
&gEfiAbcIoProtocolGuid, &AbcDevice->AbcIo,
NULL
);
if (EFI_ERROR (Status)) {
goto ErrorExit;
}
return EFI_SUCCESS;
ErrorExit:
//
// When there is an error, the private data structures need to be freed and
// the protocols that were opened need to be closed.
//
if (AbcDevice != NULL) {
gBS->FreePool (AbcDevice);
}
gBS->CloseProtocol (
ControllerHandle,
&gEfiXyzIoProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
return Status;
}