"A parallel fault was detected" messages occurred constantly

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux
  • Intel upstream ice drivers

Issue

  • Below messages occurred constantly that can not do anything.
ens1f1 : A parallel fault was detected.
possible solution : check link partner connection and configuration.
port number : 1

Resolution

  • The messages are not occurred from driver which provided from Red Hat
  • Remove 3rd party driver modules and check if the problem still exist

Root Cause

  • Message are not included in drivers which provided from Red Hat but included upstream ice drivers from intel
[1] [tags/RHEL-7.9]% grep -i "parallel fault" drivers/net/ethernet/intel/ice/ice* | wc -l
    0

[2] [tags/kernel-4.18.0-372.9.1.el8]% grep -i "parallel fault" drivers/net/ethernet/intel/ice/ice* | wc -l
    0

    % xzcat /lib/modules/4.18.0-372.26.1.el8_6.x86_64/kernel/drivers/net/ethernet/intel/ice/ice.ko.xz | strings /dev/stdin | grep -i parallel | wc -l
    0

[3] [tags/kernel-5.14.0-70.13.1.el9_0]% grep -i "parallel fault" drivers/net/ethernet/intel/ice/ice* | wc -l
    0

[4] ice-1.9.11% grep -ir "parallel fault" src
    src/ice_main.c:     netdev_err(netdev, "A parallel fault was detected.\n");

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