com_detach
if ((error = com_detach(self, flags)) != 0)
int com_detach(device_t, int);
error = com_detach(self, flags);
if ((rc = com_detach(self, flags)) != 0)
if ((error = com_detach(self, flags)) != 0)
com_mhzc_match, com_mhzc_attach, com_detach, NULL);
com_pcmcom_match, com_pcmcom_attach, com_detach, NULL);
com_xirc_match, com_xirc_attach, com_detach, NULL);