PCI: Avoid FLR for AMD Matisse HD Audio & USB 3.0
authorMarcos Scriven <marcos@scriven.org>
Wed, 20 May 2020 23:23:30 +0000 (18:23 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 22 Jun 2020 07:31:16 +0000 (09:31 +0200)
commitcb5ac1a32552be435a0459737d4051466c4953f9
treed67a766856bcd1b664e1baa3ac339d8a3c37c693
parentc41d7ca0061e59ab06148616ec4021c7089ca215
PCI: Avoid FLR for AMD Matisse HD Audio & USB 3.0

[ Upstream commit 0d14f06cd6657ba3446a5eb780672da487b068e7 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/pci/quirks.c