network loss and traffic loss problems with i40e 2.1.14-k in Xenial HWE Kernel 4.15

[Terry Rudd]

[SRU Justification]

= Impact =

Network loss and traffic loss problems experienced by customer with i40e 2.1.14-k in Xenial HWE Kernel 4.15
The traffic issues were reported from our customer deployments and we had Intel helping us with the troubleshooting of the problem.

= Fix =

Intel recommends and customer requests application of the following commit e78d9a39fd06109022d11c8ca444cfcec2abb290 (upstream Linus tree)

= Testcase =

The issue could only be seen in customer environment. Regression testing only would be possible.

= Regression Potential =

Change is limited to a specific driver, testing should show if there is any negative impact.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1819493

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Juerg Haefliger (juergh)]

The following commits are required for 4.15:
  - 14a627313893 ("i40e: Check and correct speed values for link on open")
  - 6f0c1b41ae95 ("i40e: Set fec_config when forcing link state")
  - c3880bd159d4 ("i40e: link_down_on_close private flag support")