OTUS_N_XFER
for (i = 0; i != OTUS_N_XFER; i++) {
for (i = 0; i != OTUS_N_XFER; i++) {
static const struct usb_config otus_config[OTUS_N_XFER] = {
otus_config, OTUS_N_XFER, sc, &sc->sc_mtx);
usbd_transfer_unsetup(sc->sc_xfer, OTUS_N_XFER);
usbd_transfer_unsetup(sc->sc_xfer, OTUS_N_XFER);
struct usb_xfer *sc_xfer[OTUS_N_XFER];
STAILQ_HEAD(, otus_data) sc_tx_active[OTUS_N_XFER];
STAILQ_HEAD(, otus_data) sc_tx_pending[OTUS_N_XFER];