PCI: Mark AMD Stoney GPU ATS as broken

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ATS is broken on this hardware and causes IOMMU stalls and system failure.
Disable ATS on these devices to make them usable again with IOMMU enabled.

Note that the commit in the Fixes tag is not buggy; it just uncovers the
problem in the hardware by increasing the ATS flush rate.

Link: https://lists.linuxfoundation.org/pipermail/iommu/2017-March/020836.html
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1409201
Fixes: b1516a1465 ("iommu/amd: Implement flush queue")
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>

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Joerg Roedel 2017-07-11 15:48:00 -05:00 • committed by Bjorn Helgaas

parent 16f73eb02d

commit 9b44b0b09d

1 changed files with 15 additions and 0 deletions

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drivers/pci/quirks.c

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