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Power management fix for 4.17-rc7

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Fix a regression from the 4.15 cycle that caused the system suspend
 and resume overhead to increase on many systems and triggered more
 serious problems on some of them (Rafael Wysocki).
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Merge tag 'pm-4.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fix from Rafael Wysocki:
 "Fix a regression from the 4.15 cycle that caused the system suspend
  and resume overhead to increase on many systems and triggered more
  serious problems on some of them (Rafael Wysocki)"

* tag 'pm-4.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / core: Fix direct_complete handling for devices with no callbacks
This commit is contained in:
Linus Torvalds 2018-05-24 08:49:56 -07:00
commit 9ca5a2ae42
1 changed files with 3 additions and 4 deletions
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7
drivers/base/power/main.c
View file

@ -1923,10 +1923,8 @@ static int device_prepare(struct device *dev, pm_message_t state)
dev->power.wakeup_path = false;
if (dev->power.no_pm_callbacks) {
ret = 1; /* Let device go direct_complete */
if (dev->power.no_pm_callbacks)
goto unlock;
}
if (dev->pm_domain)
callback = dev->pm_domain->ops.prepare;
@ -1960,7 +1958,8 @@ unlock:
*/
spin_lock_irq(&dev->power.lock);
dev->power.direct_complete = state.event == PM_EVENT_SUSPEND &&
pm_runtime_suspended(dev) && ret > 0 &&
((pm_runtime_suspended(dev) && ret > 0) ||
dev->power.no_pm_callbacks) &&
!dev_pm_test_driver_flags(dev, DPM_FLAG_NEVER_SKIP);
spin_unlock_irq(&dev->power.lock);
return 0;