On Friday, January 23, 2015 02:55:25 PM Bjorn Helgaas wrote: > On Tue, Jan 20, 2015 at 7:17 PM, Rafael J. Wysocki <r...@rjwysocki.net> wrote: > > From: Rafael J. Wysocki <rafael.j.wyso...@intel.com> > > > > Commit f25c0ae2b4c4 (ACPI / PM: Avoid resuming devices in ACPI PM > > domain during system suspend) modified the ACPI PM domain's system > > suspend callbacks to allow devices attached to it to be left in the > > runtime-suspended state during system suspend so as to optimize > > the suspend process. > > > > This was based on the general mechanism introduced by commit > > aae4518b3124 (PM / sleep: Mechanism to avoid resuming runtime-suspended > > devices unnecessarily). > > > > Extend that approach to PCI devices by modifying the PCI bus type's > > ->prepare callback to return 1 for devices that are runtime-suspended > > when it is being executed and that are in a suitable power state and > > need not be resumed going forward. > > > > Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com> > > I don't profess to understand this, and it seems like something you > could merge via your PM tree. So I trust you to do the right thing > with it :) > > Acked-by: Bjorn Helgaas <bhelg...@google.com>
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