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Power management fixes for 5.0-rc5

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- Since ktime_get() turns out to be problematic for device
    autosuspend in the PM-runtime framework, make it use
    ktime_get_mono_fast_ns() instead (Vincent Guittot).
 
  - Fix an initial value of a local variable in the "poll idle state"
    code that makes it behave not exactly as expected when all idle
    states except for the "polling" one are disabled (Doug Smythies).
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Merge tag 'pm-5.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix a PM-runtime framework regression introduced by the recent
  switch-over of device autosuspend to hrtimers and a mistake in the
  "poll idle state" code introduced by a recent change in it.

  Specifics:

   - Since ktime_get() turns out to be problematic for device
     autosuspend in the PM-runtime framework, make it use
     ktime_get_mono_fast_ns() instead (Vincent Guittot).

   - Fix an initial value of a local variable in the "poll idle state"
     code that makes it behave not exactly as expected when all idle
     states except for the "polling" one are disabled (Doug Smythies)"

* tag 'pm-5.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpuidle: poll_state: Fix default time limit
  PM-runtime: Fix deadlock with ktime_get()
This commit is contained in:
Linus Torvalds 2019-02-01 10:23:39 -08:00
commit 3325254ca1
3 changed files with 7 additions and 7 deletions
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2
include/linux/pm_runtime.h
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@ -105,7 +105,7 @@ static inline bool pm_runtime_callbacks_present(struct device *dev)
static inline void pm_runtime_mark_last_busy(struct device *dev)
{
WRITE_ONCE(dev->power.last_busy, ktime_to_ns(ktime_get()));
WRITE_ONCE(dev->power.last_busy, ktime_get_mono_fast_ns());
}
static inline bool pm_runtime_is_irq_safe(struct device *dev)