read_status
if(B_OK != (status = read_status(udi, fst))){
if(B_OK != (command_status = read_status(udi, &fst))){
status = read_status(udi, &csw, transfer_len);
s = read_status(st->port);
s = read_status(st->port);
s = read_status(st->port);
} while ((s & 0x80) || (s != read_status(st->port)));
s = read_status(st->port);
} while (!(s & 0x80) || (s != read_status(st->port)));
if ((read_status(st->port) & 0xf8) != 0x80)
v = read_status(st->port);
v = read_status(st->port);