PCI: Avoid FLR for AMD Matisse HD Audio & USB 3.0

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The AMD Matisse HD Audio & USB 3.0 devices advertise Function Level Reset
support, but hang when an FLR is triggered.

To reproduce the problem, attach the device to a VM, then detach and try to
attach again.

Rename the existing quirk_intel_no_flr(), which was not Intel-specific, to
quirk_no_flr(), and apply it to prevent the use of FLR on these AMD
devices.

Link: https://lore.kernel.org/r/CAAri2DpkcuQZYbT6XsALhx2e6vRqPHwtbjHYeiH7MNp4zmt1RA@mail.gmail.com
Signed-off-by: Marcos Scriven <marcos@scriven.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

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Marcos Scriven 2020-05-20 18:23:30 -05:00 • committed by Bjorn Helgaas

parent 60369a4f8d

commit 0d14f06cd6

1 changed files with 14 additions and 4 deletions

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drivers/pci/quirks.c

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