[Bug 211713] NVME controller failure: resetting

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211713

--- Comment #9 from Robin Randhawa <robin.randhawa at arm.com> ---
(In reply to Terry Kennedy from Comment #8)

Hi Terry.

Thanks for the responses. I concur with your view that this is likely something
to do with the suspend-resume pathway and missing context that isn't restored
correctly (or at all).

BTW I was incorrectly stating a ~5 second 'stall'. This is in fact closer to
~30 seconds. So after a resume from ACPI S3, there is a ~30 second freeze
before the abort messages and the system becoming usable again. Most
irritating.

I'm trying to grok the nvme driver source to see if there is some basic suspend
resume callbacks that need fleshing out. I will update if I make any headway.

I also worry that there is some ACPI <-> NVMe overlaps that may be to blame.
This is a fairly new laptop and there are a whole lot of ACPI related messages
appearing in the kernel log buffer at suspend-resume time.

Cheers.

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