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Power management fixes for v4.15-rc5

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- Fix an issue in the PCI handling of the "thaw" transition during
    hibernation (after creating an image), introduced by a bug fix
    from the 4.13 cycle and exposed by recent changes in the IRQ
    subsystem, that caused pci_restore_state() to be called for
    devices in low-power states in some cases which is incorrect
    and breaks MSI management on some systems (Rafael Wysocki).
 
  - Fix a recent regression in the imx6q cpufreq driver that broke
    speed grading on i.MX6 QuadPlus by omitting checks causing
    invalid operating performance points (OPPs) to be disabled on
    that SoC as appropriate (Lucas Stach).
 
  - Fix a regression introduced during the 4.14 cycle in the ondemand
    and conservative cpufreq governors that causes the sampling
    interval used by them to be shorter than the tick period in some
    cases which leads to incorrect decisions (Rafael Wysocki).
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Merge tag 'pm-4.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix a regression in the ondemand and conservative cpufreq
  governors that was introduced during the 4.13 cycle, a recent
  regression in the imx6q cpufreq driver and a regression in the PCI
  handling of hibernation from the 4.14 cycle.

  Specifics:

   - Fix an issue in the PCI handling of the "thaw" transition during
     hibernation (after creating an image), introduced by a bug fix from
     the 4.13 cycle and exposed by recent changes in the IRQ subsystem,
     that caused pci_restore_state() to be called for devices in
     low-power states in some cases which is incorrect and breaks MSI
     management on some systems (Rafael Wysocki).

   - Fix a recent regression in the imx6q cpufreq driver that broke
     speed grading on i.MX6 QuadPlus by omitting checks causing invalid
     operating performance points (OPPs) to be disabled on that SoC as
     appropriate (Lucas Stach).

   - Fix a regression introduced during the 4.14 cycle in the ondemand
     and conservative cpufreq governors that causes the sampling
     interval used by them to be shorter than the tick period in some
     cases which leads to incorrect decisions (Rafael Wysocki)"

* tag 'pm-4.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: governor: Ensure sufficiently large sampling intervals
  cpufreq: imx6q: fix speed grading regression on i.MX6 QuadPlus
  PCI / PM: Force devices to D0 in pci_pm_thaw_noirq()
This commit is contained in:
Linus Torvalds 2017-12-20 13:41:40 -08:00
commit 9cd238ab2d
3 changed files with 28 additions and 9 deletions
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