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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-10-07 01:50:24 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-10-14 03:17:34 +0300
commit58a1fbbb2ee873dd1fe327e80bc7b08e80866269 (patch)
tree3c3552e6631af82c4afb3f449ae8042bc925bf53 /drivers/acpi/acpi_lpss.c
parentef25ba0476015908ef5960f9faac149ddf34ede0 (diff)
downloadlinux-58a1fbbb2ee873dd1fe327e80bc7b08e80866269.tar.xz
PM / PCI / ACPI: Kick devices that might have been reset by firmware
There is a concern that if the platform firmware was involved in the system resume that's being completed, some devices might have been reset by it and if those devices had the power.direct_complete flag set during the preceding suspend transition, they may stay in a reset-power-on state indefinitely (until they are runtime-resumed and then suspended again). That may not be a big deal from the individual device's perspective, but if the system is an SoC, it may be prevented from entering deep SoC-wide low-power states on idle because of that. The devices that are most likely to be affected by this issue are PCI devices and ACPI-enumerated devices using the general ACPI PM domain, so to prevent it from happening for those devices, force a runtime resume for them if they have their power.direct_complete flags set and the platform firmware was involved in the resume transition currently in progress. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/acpi_lpss.c')
-rw-r--r--drivers/acpi/acpi_lpss.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index f51bd0d0bc17..f9e0d09f7c66 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -664,7 +664,7 @@ static struct dev_pm_domain acpi_lpss_pm_domain = {
#ifdef CONFIG_PM
#ifdef CONFIG_PM_SLEEP
.prepare = acpi_subsys_prepare,
- .complete = acpi_subsys_complete,
+ .complete = pm_complete_with_resume_check,
.suspend = acpi_subsys_suspend,
.suspend_late = acpi_lpss_suspend_late,
.resume_early = acpi_lpss_resume_early,