Re: [PATCH 0/5] Improvements to PCI hibernate path

[Rafael J. Wysocki]

On Mon, Apr 27, 2026 at 4:14 PM Mario Limonciello <superm1@xxxxxxxxxx> wrote:
>
> On 4/27/26 07:20, Rafael J. Wysocki wrote:
> > On Mon, Apr 27, 2026 at 5:53 AM Mario Limonciello (AMD)
> > <superm1@xxxxxxxxxx> wrote:
> >>
> >> A few cycles ago I sent out a kernel series for using the S4 paths when
> >> the system goes to S5.  Some parts of it got merged, and Rafael suggested
> >> to split the other parts into smaller pieces across multiple kernel cycles
> >> to make bisecting easier.
> >>
> >> This fell into my backlog behind other things, so I wanted to try again
> >> this cycle for the PCI pieces. I have been carrying it, rebasing it and
> >> personally using it for a while now though.
> >>
> >> This series attempts to unify the PCI suspend and hibernate paths and to
> >> fix some things that I observed to be wrong with how I expect hibernate
> >> to work.
> >>
> >> It is based off 7.1-rc1 + Lukas' patch:
> >> "PCI: Stop setting cached power state to "unknown" on unbind"
> >>
> >> Mario Limonciello (AMD) (5):
> >>    PCI/PM: Disable device wakeups when halting or powering off system
> >>    PCI/PM: Split out code from pci_pm_suspend_noirq() into helper
> >>    PCI/PM: Run bridge power up actions as part of restore phase
> >>    PCI/PM: Use pci_power_manageable() in pci_pm_poweroff_noirq()
> >>    PCI: Put PCIe bridges with downstream devices into D3 at hibernate
> >>
> >>   drivers/pci/pci-driver.c | 103 ++++++++++++++++++++++++++-------------
> >>   1 file changed, 69 insertions(+), 34 deletions(-)
> >>
> >> --
> >
> > It would be good to CC this to linux-pm.
>
> Sure thing - if there is a need for a v2, I will include linux-pm in CC.

The thing is, you may not know if there's a need for a v2 without resending.