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Date: Sun, 7 Apr 2024 19:51:47 -0400 From: Sasha Levin <sashal@...nel.org> To: Bjorn Helgaas <helgaas@...nel.org> Cc: linux-kernel@...r.kernel.org, stable@...r.kernel.org, Edmund Raile <edmund.raile@...ton.me>, Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org Subject: Re: [PATCH AUTOSEL 6.6 52/75] PCI: Mark LSI FW643 to avoid bus reset 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@...ton.me> >> >> [ 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@proton.me >> Signed-off-by: Edmund Raile <edmund.raile@...ton.me> >> [bhelgaas: commit log, comment] >> Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com> >> Signed-off-by: Sasha Levin <sashal@...nel.org> > >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@kernel.org I'll drop it, thanks! -- Thanks, Sasha
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