Public bug reported:
SRU justification:
[Impact]
System hang after unplug thunderbolt dock with Intel igc lan.
[Fix]
igc driver continue reading and writing MMIO address after PCI device is
unplugged.
This cause system page fault, and system hang.
Add safe check and prevent reading and writing the MMIO.
The patch is in maintainer's tree, but not merged to Linus's tree.
Due to the schedule, send SRU as SAUCE patch.
[Test]
Verified on hardware, after unplug the thunderbolt cable,
system work 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-5.10 (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-oem-5.13 (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-oem-5.10 (Ubuntu Focal)
Importance: Undecided
Status: New
** Affects: linux-oem-5.13 (Ubuntu Focal)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Hirsute)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Impish)
Importance: Undecided
Status: New
** Tags: oem-priority originate-from-1931982 originate-from-1932115 sutton
** Also affects: linux-oem-5.10 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.13 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.10 (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.13 (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Impish)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.10 (Ubuntu Impish)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.13 (Ubuntu Impish)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Hirsute)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.10 (Ubuntu Hirsute)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.13 (Ubuntu Hirsute)
Importance: Undecided
Status: New
** No longer affects: linux (Ubuntu Focal)
** No longer affects: linux-oem-5.10 (Ubuntu Hirsute)
** No longer affects: linux-oem-5.10 (Ubuntu Impish)
** No longer affects: linux-oem-5.13 (Ubuntu Hirsute)
** No longer affects: linux-oem-5.13 (Ubuntu Impish)
** Tags added: oem-priority originate-from-1932115 sutton
** Tags added: originate-from-1931982
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https://bugs.launchpad.net/bugs/1938689
Title:
[SRU][H/OEM-5.10/OEM-5.13/U] Fix system hang after unplug tbt dock
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