On Fri, Mar 29, 2024 at 10:17:02AM -0500, Bjorn Helgaas wrote:
On Fri, Mar 29, 2024 at 08:42:33AM -0400, Sasha Levin wrote:
From: Edmund Raile <edmund.raile@xxxxxxxxx>
[ Upstream commit 29a43dc130ce65d365a8ea9e1cc4bc51005a353e ]
Apparently the LSI / Agere FW643 can't recover after a Secondary Bus Reset
and requires a power-off or suspend/resume and rescan.
VFIO resets a device before assigning it to a VM, and the FW643 doesn't
support any other reset methods, so this problem prevented assignment of
FW643 to VMs.
Prevent use of Secondary Bus Reset for this device.
With this change, the FW643 can be assigned to VMs with VFIO. Note that it
will not be reset, resulting in leaking state between VMs and host.
Link: https://lore.kernel.org/r/20240227131401.17913-1-edmund.raile@xxxxxxxxx
Signed-off-by: Edmund Raile <edmund.raile@xxxxxxxxx>
[bhelgaas: commit log, comment]
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
We're about to revert this upstream, so I wouldn't backport this to
any stable trees:
https://lore.kernel.org/r/20240328212302.1582483-1-helgaas@xxxxxxxxxx
I'll drop it, thanks!
--
Thanks,
Sasha
