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

[Tim Gardner]

On 7/6/22 05:40, AceLan Kao wrote:
> 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(-)
> 

"PCI/ASPM: Save/restore L1SS Capability for suspend/resume" has been 
reverted in linux-next.

rtg
-- 
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Tim Gardner
Canonical, Inc