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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-01-21 02:17:42 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-01-23 22:13:54 +0100 |
| commit | bac2a909a096c9110525c18cbb8ce73c660d5f71 (patch) | |
| tree | 59bd2a6efea9c9cb4cca404f35ae94c67f0dd988 /kernel | |
| parent | ec6f34e5b552fb0a52e6aae1a5afbbb1605cc6cc (diff) | |
| download | linux-bac2a909a096c9110525c18cbb8ce73c660d5f71.tar.bz2 | |
PCI / PM: Avoid resuming PCI devices during system suspend
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.wysocki@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions