[Bug 240944] em(4): Crash with Intel 82571EB NIC with AMD Piledriver and Steamroller APUs

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 05 Sep 2021 18:27:39 UTC

--- Comment #13 from Kevin Bowling <kbowling@freebsd.org> ---
(In reply to Ace from comment #12)
> ecap 0001[100] = AER 1 0 fatal 1 non-fatal 2 corrected

You have some fatal PCI errors occurring on the card, and that looks consistent
with the other pciconf reports..  just to start with a low effort guess can you
try disabling PCI Link Power management (ASPM) and/or AER (advanced error
reporting) in the system's firmware and see what happens?

Beyond that there are a number of relevant errata we may need to check off in
the driver to see if we are missing some mitigation
the above two firmware changes stand out to me as eliminating some possible

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