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Subject: [Bug 196980] [pci] PCI Resource Allocation Causing 2 em devices to
 fail during initialization
Date: Mon, 03 Aug 2015 20:08:42 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=196980

Sean Bruno <sbruno@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|New                         |In Progress
           Keywords|IntelNetworking             |
                 CC|                            |jhb@FreeBSD.org

--- Comment #4 from Sean Bruno <sbruno@FreeBSD.org> ---
As a shot in the dark, can you add this to your kernel and see if it helps?

sys/dev/pci % svn diff
Index: pci.c
===================================================================
--- pci.c    (revision 286233)
+++ pci.c    (working copy)
@@ -247,10 +247,11 @@
     { 0x35808086, PCI_QUIRK_DISABLE_MSI,    0,    0 },

     /*
-     * MSI doesn't work with devices behind the AMD 8131 HT-PCIX
+     * MSI doesn't work with devices behind the AMD 8131/8132 HT-PCIX
      * bridge.
      */
     { 0x74501022, PCI_QUIRK_DISABLE_MSI,    0,    0 },
+    { 0x74521022, PCI_QUIRK_DISABLE_MSI,    0,    0 },

     /*
      * MSI-X allocation doesn't work properly for devices passed through

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