IXGBE_DMATXCTL
reg_data = IXGBE_READ_REG(&adapter->hw, IXGBE_DMATXCTL);
IXGBE_WRITE_REG(&adapter->hw, IXGBE_DMATXCTL, reg_data);
dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
(IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
reg_dma = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, reg_dma);