MVPP2_GMAC_INT_SUM_MASK_REG
reg = mvpp2_gmac_read(sc, MVPP2_GMAC_INT_SUM_MASK_REG);
mvpp2_gmac_write(sc, MVPP2_GMAC_INT_SUM_MASK_REG, reg);
reg = mvpp2_gmac_read(sc, MVPP2_GMAC_INT_SUM_MASK_REG);
mvpp2_gmac_write(sc, MVPP2_GMAC_INT_SUM_MASK_REG, reg);