PRESTERA_SDMA_RX_DESC_PER_Q
return (buf_idx + 1) % PRESTERA_SDMA_RX_DESC_PER_Q;
for (b = 0; b < PRESTERA_SDMA_RX_DESC_PER_Q; b++) {
int bnum = PRESTERA_SDMA_RX_DESC_PER_Q;