APPLIED[K/U]: [SRU] [RESEND] [J/K] [PATCH 00/10] Disable PTM when device is suspended for all PCIe devices
Andrea Righi
andrea.righi at canonical.com
Wed Oct 12 05:46:15 UTC 2022
On Tue, Oct 11, 2022 at 11:41:28AM +0800, Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/1988797
>
> [Impact]
> Unsupporeted PTM requests can flood kernel dmesg. It can also prevent
> the system from suspending because the AER IRQ can never be quiesced.
>
> [Fix]
> Disable PTM when PCIe device is suspended.
>
> [Test]
> No more AER in dmesg, and affected system can suspend correctly.
>
> [Where problems could occur]
> According to PCIe spec, disabling PTM is suggested, but it's possible
> that there are devices don't like PTM to be disabled during suspend.
Applied to kinetic/linux and kinetic/linux-unstable.
Thanks,
-Andrea
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