Public bug reported:
[Impact]
On PCH400 and PCH500, root port on S3 resume trips AER and DPC, dropping
NVMe after a failed reset.
[Fix]
Disable AER/DPC interrupt on suspend.
[Test]
Apply the patch, run S3 stress test 100 times on CML/PCH400 and
RKL/PCH500, issue is no longer reproducible.
[Where problems could occur]
If any device depends on tripping AER/DPC to reset after system resume
to work properly, this patch series will break them.
** Affects: linux-oem-5.10 (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux-oem-5.10 (Ubuntu Focal)
Importance: High
Status: Confirmed
** Also affects: linux-oem-5.10 (Ubuntu Focal)
Importance: Undecided
Status: New
** Changed in: linux-oem-5.10 (Ubuntu)
Status: New => Invalid
** Changed in: linux-oem-5.10 (Ubuntu Focal)
Status: New => Confirmed
** Changed in: linux-oem-5.10 (Ubuntu Focal)
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1913691
Title:
Fix unexpected AER/DPC on PCH400 and PCH500
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