- Instance->McastUdpPort = UdpIoCreateIo (\r
- Instance->Service->Controller,\r
- Instance->Service->Image,\r
- Mtftp4RrqConfigMcastPort,\r
- UDP_IO_UDP4_VERSION,\r
- Instance\r
- );\r
+ if (Instance->McastUdpPort == NULL) {\r
+ Instance->McastUdpPort = UdpIoCreateIo (\r
+ Instance->Service->Controller,\r
+ Instance->Service->Image,\r
+ Mtftp4RrqConfigMcastPort,\r
+ UDP_IO_UDP4_VERSION,\r
+ Instance\r
+ );\r
+ if (Instance->McastUdpPort != NULL) {\r
+ Status = gBS->OpenProtocol (\r
+ Instance->McastUdpPort->UdpHandle,\r
+ &gEfiUdp4ProtocolGuid,\r
+ (VOID **) &Udp4,\r
+ Instance->Service->Image,\r
+ Instance->Handle,\r
+ EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r
+ );\r
+ if (EFI_ERROR (Status)) {\r
+ UdpIoFreeIo (Instance->McastUdpPort);\r
+ Instance->McastUdpPort = NULL;\r
+ return EFI_DEVICE_ERROR;\r
+ }\r
+ }\r
+ }\r
+\r