[Bug 211219] NIC status does not pass into a state of "no carrier" after disconnecting the cable.

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211219

Eric Joyner <erj at freebsd.org> changed:

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                 CC|                            |erj at freebsd.org

--- Comment #5 from Eric Joyner <erj at freebsd.org> ---
(In reply to Jeff Pieper from comment #4)

I think this is an issue only in MSI-X mode; I tried an 82754L in MSI mode and
unplugging/plugging in the cable behaved as expected.

We should check the IVAR, IMS, and other interrupt-cause-related registers,
since it appears the link interrupt isn't even being generated.

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