APPLIED [OEM-5.14] Re: [SRU] [J/K/Unstable/OEM-5.17/OEM-6.0] [PATCH 00/10] Disable PTM when device is suspended for all PCIe devices

[Timo Aaltonen]

Kai-Heng Feng kirjoitti 15.9.2022 klo 15.09:
> 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.
> 
> Bjorn Helgaas (9):
>    PCI/PTM: Cache PTM Capability offset
>    PCI/PTM: Add pci_upstream_ptm() helper
>    PCI/PTM: Separate configuration and enable
>    PCI/PTM: Add pci_suspend_ptm() and pci_resume_ptm()
>    PCI/PTM: Move pci_ptm_info() body into its only caller
>    PCI/PTM: Preserve RsvdP bits in PTM Control register
>    PCI/PTM: Reorder functions in logical order
>    PCI/PTM: Consolidate PTM interface declarations
>    PCI/PM: Always disable PTM for all devices during suspend
> 
> Rajvi Jingar (1):
>    PCI/PM: Simplify pci_pm_suspend_noirq()
> 
>   drivers/pci/pci-driver.c |  30 ++--
>   drivers/pci/pci.c        |  28 +---
>   drivers/pci/pci.h        |  14 +-
>   drivers/pci/pcie/ptm.c   | 300 ++++++++++++++++++++++-----------------
>   include/linux/pci.h      |   3 +
>   5 files changed, 199 insertions(+), 176 deletions(-)
> 

Since this is needed in a final (for real) oem-5.14 respin I've 
cherry-picked 1d71eb53 and 014408cd so these applied cleanly.


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