EFI_STATUS(EFIAPI * EFI_PCI_HOTPLUG_REQUEST_NOTIFY)(IN EFI_PCI_HOTPLUG_REQUEST_PROTOCOL *This, IN EFI_PCI_HOTPLUG_OPERATION Operation, IN EFI_HANDLE Controller, IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL, IN OUT UINT8 *NumberOfChildren, IN OUT EFI_HANDLE *ChildHandleBuffer)