[Bug 233952] jme NICs non functional after 11.2 to 12.0 upgrade

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=233952

            Bug ID: 233952
           Summary: jme NICs non functional after 11.2 to 12.0 upgrade
           Product: Base System
           Version: 12.0-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: mail at hughobrien.ie

Created attachment 200052
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=200052&action=edit
pciconf -vl and dmesg

jme device does not seem to send/receive packages after upgrading to
12.0-RELEASE.

CC: yongari at freebsd.org

tests:
 1. boot into 11.2-RELEASE live-cd, assign ip to jme device, ping local gw,
success
 2. boot into 12.0-RELEASE live-cd, assign ip to jme device, ping local gw,
failure


workaround:

disabling msi and msi_x allow the device to work again. I tested each
separately but it seems they must both be disabled.

/boot/loader.conf:
hw.jme.msi_disable="1"
hw.jme.msix_disable="1"

FreeBSD vaio 12.0-RELEASE FreeBSD 12.0-RELEASE r341666 GENERIC  amd64

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