[Bug 1942999] [NEW] [SRU][H/OEM-5.13/OEM-5.14/U] Fix invalid MAC address after hotplug tbt dock

Public bug reported:

SRU justification:

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

[Fix]
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.

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

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

** Affects: hwe-next
Importance: Undecided
Status: New

** Affects: linux (Ubuntu)
Importance: Undecided
Status: New

** Affects: linux-oem-5.13 (Ubuntu)
Importance: Undecided
Status: New

** Affects: linux-oem-5.14 (Ubuntu)
Importance: Undecided
Status: New

** Affects: linux-oem-5.13 (Ubuntu Focal)
Importance: Undecided
Status: New

** Affects: linux-oem-5.14 (Ubuntu Focal)
Importance: Undecided
Status: New

** Affects: linux (Ubuntu Hirsute)
Importance: Undecided
Status: New


** Tags: oem-priority originate-from-1942744 originate-from-1942746 sutton

** Also affects: linux (Ubuntu Hirsute)
Importance: Undecided
Status: New

** Also affects: linux-oem-5.13 (Ubuntu)
Importance: Undecided
Status: New

** Also affects: linux-oem-5.14 (Ubuntu)
Importance: Undecided
Status: New

** No longer affects: linux-oem-5.13 (Ubuntu Hirsute)

** No longer affects: linux-oem-5.14 (Ubuntu Hirsute)

** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New

** Also affects: linux-oem-5.13 (Ubuntu Focal)
Importance: Undecided
Status: New

** Also affects: linux-oem-5.14 (Ubuntu Focal)
Importance: Undecided
Status: New

** No longer affects: linux (Ubuntu Focal)

** Tags added: oem-priority originate-from-1942746 sutton

** Tags added: originate-from-1942744

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

Title:
[SRU][H/OEM-5.13/OEM-5.14/U] Fix invalid MAC address after hotplug tbt
dock

Status in HWE Next:
New
Status in linux package in Ubuntu:
New
Status in linux-oem-5.13 package in Ubuntu:
New
Status in linux-oem-5.14 package in Ubuntu:
New
Status in linux-oem-5.13 source package in Focal:
New
Status in linux-oem-5.14 source package in Focal:
New
Status in linux source package in Hirsute:
New

Bug description:
SRU justification:

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

[Fix]
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.

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

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

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