func: static void ohci_async_cancel_device(OHCIState *ohci, USBDevice *dev)
  
  {
  
      if (ohci->async_td &&
  
          ohci->usb_packet.owner != NULL &&
  
          ohci->usb_packet.owner->dev == dev) {
  
          usb_cancel_packet(&ohci->usb_packet);
  
          ohci->async_td = 0;
  
      }
  
  }
  