IBIR_XFER_BYTES
nbytes = IBIR_XFER_BYTES(ibir);
slot->len = min_t(unsigned int, IBIR_XFER_BYTES(ibir),
for (i = 0; i < IBIR_XFER_BYTES(ibir); i += 4)
WARN_ON(IBIR_XFER_BYTES(ibir) || (ibir & IBIR_ERROR));
WARN_ON(IBIR_XFER_BYTES(ibir) || (ibir & IBIR_ERROR));