[PATCH 0/1][SRU][J/OEM-5.17/U] Fix invalid MAC address after hotplug tbt dock

Aaron Ma aaron.ma at canonical.com
Wed Aug 3 07:55:52 UTC 2022

BugLink: https://bugs.launchpad.net/bugs/1942999

igc driver can not connect to network after re-plugin thunderbolt dock
MAC passthrough enabled in BIOS.

Wait for the MAC copy of BIOS when enabled MAC passthrough.
Intel engineer wants a different solution and promise to discuss with
firmware engineer.
Due to the schedule, made this as a short term solution to fix the
issue, and wait for the other
fix from Intel.

Verified on hardware, after hotplug the thunderbolt cable,
Ethernet works fine.

[Where problems could occur]
It may break the igc driver.

Intel still doesn't provide any solution about their approach.
In the meantime, this patch is still the only fix.
Re-submit it to Jammy, oem-5.17 and Unstable kernel.

Aaron Ma (1):
  UBUNTU: SAUCE: igc: wait for the MAC copy when enabled MAC passthrough

 drivers/net/ethernet/intel/igc/igc_main.c | 3 +++
 1 file changed, 3 insertions(+)


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