IXGBE_RXCSUM
reg_val = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
reg_val = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, reg_val);
rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);