RX_BUFS_COUNT
priv->rx_size = RX_BUF_SIZE * RX_BUFS_COUNT;
value = (RX_BUFS_COUNT << UDMA_RX_CTRL_NUM_BUF_USED_SHIFT)
for (x = 0; x < RX_BUFS_COUNT; x++) {
for (x = 0; x < RX_BUFS_COUNT; x++)
if (priv->rx_next_buf == RX_BUFS_COUNT)