[SRU] [F/G/Unstable/OEM-5.6] [PATCH v2 0/1] Fix non-working Intel NVMe after S3

Kai-Heng Feng kai.heng.feng at canonical.com
Thu Oct 22 05:51:45 UTC 2020

BugLink: https://bugs.launchpad.net/bugs/1900847

Intel NVMe has a 10% chance to stop working after S3.

Enable ACS quirk on all Intel CML root ports.

With the patch applied, Intel NVMe mostly works after S3. There's still a
1/1000 chance the issue happens. Intel is investigating the root cause.

[Regression Potential]
ACS works at hardware level, so I can't really assess the risk of
regression. Since Intel confirmed CML also needs ACS quirk, we can only
trust them until they devise a real fix.

Kai-Heng Feng (1):
  UBUNTU: SAUCE: PCI: Enable ACS quirk on all CML root ports

 drivers/pci/quirks.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)


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