MLXBF_GIGE_RX_DMA
data = readq(priv->base + MLXBF_GIGE_RX_DMA);
writeq(data, priv->base + MLXBF_GIGE_RX_DMA);
data = readq(priv->base + MLXBF_GIGE_RX_DMA);
writeq(data, priv->base + MLXBF_GIGE_RX_DMA);