[PATCH 0/2][SRU][J][K][OEM-5.14][OEM-5.17] System freeze after resuming from suspend due to PCI ASPM settings

[AceLan Kao]

From: "Chia-Lin Kao (AceLan)" <acelan.kao at canonical.com>

BugLink: https://bugs.launchpad.net/bugs/1980829

[Impact]
While doing some tests such as suspend/resume or CPU stress tests the system would hang.

[Fix]
The 2 commits fix the issue, but still not get accepted yet.
https://patchwork.ozlabs.org/project/linux-pci/patch/20220705060014.10050-1-vidyas@nvidia.com/
https://patchwork.ozlabs.org/project/linux-pci/patch/20220509073639.2048236-1-kai.heng.feng@canonical.com/

[Test]
Verified on the failed machines and ODM also verified on their side.

[Where problems could occur]
The 2 patches look pretty safe to me, they try to preserve the ASPM state of devices.

Kai-Heng Feng (1):
  PCI:ASPM: Remove pcie_aspm_pm_state_change()

Vidya Sagar (1):
  PCI/ASPM: Save/restore L1SS Capability for suspend/resume

 drivers/pci/pci.c       | 10 +++++--
 drivers/pci/pci.h       |  6 ++--
 drivers/pci/pcie/aspm.c | 63 ++++++++++++++++++++++++++++-------------
 3 files changed, 55 insertions(+), 24 deletions(-)

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2.25.1