func: static int vfio_start_eventfd_injection(VFIOINTp *intp)
  
  {
  
      int ret;
  
  
  
      ret = vfio_set_trigger_eventfd(intp, vfio_intp_interrupt);
  
      if (ret) {
  
          error_report("vfio: Error: Failed to pass IRQ fd to the driver: %m");
  
      }
  
      return ret;
  
  }
  