From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens-P6GI/4k7KOmELgA04lAiVw@public.gmane.org>
Subject: AMD-Vi regression with PCIe/PCI bridges in 4.4
Date: Sun, 3 Apr 2016 08:59:53 +0200
Message-ID: <5700BF69.2080102@ladisch.de>
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To: Joerg Roedel <jroedel-l3A5Bk7waGM@public.gmane.org>
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Hi,

there are several reports of Xonar PCIe sound cards failing to work in
kernel 4.4 (including 4.4.5):

https://bugzilla.redhat.com/show_bug.cgi?id=1313790
https://bugzilla.kernel.org/show_bug.cgi?id=111711
https://bbs.archlinux.org/viewtopic.php?pid=1601338#p1601338

They show error messages like this:

  AMD-Vi: Event logged [IO_PAGE_FAULT device=03:00.0 domain=0x0000 address=0x000000000020cf00 flags=0x0070]

All these cards use a PCI chip, with different PCIe bridges (ASM1083,
PEX8112, PEX8111).

It probably matters that "03" is the PCI bus, but that device "00" does
not exist.


Regards,
Clemens