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    SubjectRE: [PATCH 0/2] PCI/AER: Consistently use _OSC to determine who owns AER
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    From: Alexandru Gagniuc
    > Sent: 15 November 2018 23:16
    ...
    > I've asked around a few people at Dell and they unanimously agree that
    > _OSC is the correct way to determine ownership of AER.

    This is all very well, but we have systems (they might be Dell ones)
    where failure of a PCIe link (even when all the drivers are removed)
    causes an NMI - and crashes the kernel.

    There are other systems which have AER registers available for
    some of the PCIe devices, but the BIOS ignores them and _OSC
    doesn't let the kernel take control.
    In this case the AER registers can contain useful information
    after a read returns ~0u.
    It would be useful to be able to get this information without
    having to grovel through all the PCIe config space.

    David

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