SFP+ module of X520 cannot be identified

Hi,

We have several HP DL380Gen9 with x520 10Gb NIC, and use CentOS. After Update CentOS 7.2 to 7.4, we found same SFP+ module (HP 10Gb SR SFP+) behave differently:

      1, Centos 7.2+ixgbe 5.3.7:  SFP+ Module works fine.

      2, CentOS 7.4+ixgbe 5.3.7: SFP+ Module doesnot work.  The value of comp_codes_10g/comp_codes_1g in ixgbe_identify_sfp_module_generic of ixgbe driver is zero, and cause the SFP+ modules cannot be identified.

By comparison test, we also found:

     1, Using allow_unsupported_sfp param cannot fix this problem.

     2, Using CentOS 7.4+x520+other SFP+ module(from HPE or other vendor), SFP+ Module can work fine.

These make us very confused and wanna to know:

     1, the reason of comp_codes_10g/comp_codes_1g becomes zero.

     2, how fix this problem.

     3, is it related to kernel or driver.

Any ideas and suggestions will be appreciated, Tks a lot!