IXGBE_FWSM_BY_MAC
mac->arc_subsystem_valid = !!(IXGBE_READ_REG(hw, IXGBE_FWSM_BY_MAC(hw))
fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM_BY_MAC(hw));
fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM_BY_MAC(hw));
mac->arc_subsystem_valid = !!(IXGBE_READ_REG(hw, IXGBE_FWSM_BY_MAC(hw))
fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM_BY_MAC(hw));