usb_addr2dindex
size_t dindex = usb_addr2dindex(addr);
size_t dindex = usb_addr2dindex(addr);
size_t dindex = usb_addr2dindex(addr);
size_t dindex = usb_addr2dindex(addr);
bus->ub_devices[usb_addr2dindex(addr)] = dev;
dev->ud_bus->ub_devices[usb_addr2dindex(dev->ud_addr)] = NULL;
dev->ud_bus->ub_devices[usb_addr2dindex(dev->ud_addr)] = NULL;
KASSERTMSG(bus->ub_devices[usb_addr2dindex(dev->ud_addr)] == NULL,
bus->ub_devices[usb_addr2dindex(dev->ud_addr)] = dev;