Re: [PATCH v3 3/3] PCI: dwc: Enable MSI affinity support

[Brian Norris <briannorris@chromium.org>]

On Mon, Jun 01, 2026 at 12:02:55PM -0700, Brian Norris wrote:
> > Perhaps a long-shot, but have you tried to apply:
> > https://lore.kernel.org/linux-pci/20260519-l1ss-fix-v2-0-b2c3a4bdeb15@oss.qualcomm.com/
> 
> For the record, that's:
> 
> [PATCH v2 0/4] PCI: Introduce pci_suspend_retains_context() API
> 
> > to see if it helps your problem?
> 
> It also seemed like a long-shot, but I tried it and it does resolve my
> problems. Maybe I can provide a Tested-by there.
> 
> > https://lore.kernel.org/linux-pci/r247uuc7ilkhn65vcbsaoxhgypif37lj3r3mvb7ooqqdg55vnm@vx3ip6klg6ha/
> > also seems to mention a recent PSCI fix:
> > https://lore.kernel.org/all/20251231162126.7728-1-manivannan.sadhasivam@oss.qualcomm.com/
> 
> That's:
> [PATCH] firmware: psci: Set pm_set_resume/suspend_via_firmware() for SYSTEM_SUSPEND
> 
> > Which also sounds somewhat related.
> 
> Yes, that looks somewhat related. I tried it, and it seems to resolve my
> issue as well.

Oh, nice, I see that this was already applied to pci/next for v7.2. I
had already tested pci/next, but as luck would have it, I had pulled it
a day before Bjorn Helgaas applied the series.

I can't imagine this is a linux-stable candidate though, as it appears
to be a bit more of a "new feature" thing. I'm still stuck wondering how
this showed up as a regression for me.

Brian