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Update devfreq for 5.19-rc5

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Detailed description for this pull request:
 1. Fix devfreq passive governor issue when cpufreq policy are not ready
 during kernel booting because some cpus turn on after kernel booting or others.
 
   - Re-initialize the vairables of struct devfreq_passive_data when PROBE_DEFER
   happen when cpufreq_get_returns NULL
 
   - Use dev_err_probe to mute warning when PROBE_DEFER
 
   - Fix cpufreq passive unregister erroring on PROBE_DEFER
   by using the allocated parent_cpu_data list to free resouce
   instead of for_each_possible_cpu.
 
   - Remove duplicate cpufreq passive unregister and warning when PROBE_DEFER
 
   - Use HZ_PER_KZH macro in units.h
 
   - Fix wrong indentation in SPDX-License line
 
 2. Fix reference count leak of exynos-ppmu.c by using of_node_put()
 
 3. Rework freq_table to be local to devfreq struct
   - struct devfreq_dev_profile includes freq_table array to store
   the supported frequencies. If devfreq driver doesn't initialize
   the freq_table, devfreq core allocate the memory and initialize
   the freq_table.
 
   On a devfreq PROBE_DEFER, the freq_table in the driver profile struct,
   is never reset and may be leaved in an undefined state. To fix this
   and correctly handle PROBE_DEFER, use a local freq_table and
   max_state in the devfreq struct.
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Merge tag 'devfreq-fixes-for-5.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux

Pull devfreq fixes for 5.19-rc5 from Chanwoo Choi:

"1. Fix devfreq passive governor issue when cpufreq policies are not
    ready during kernel boot because some CPUs turn on after kernel
    booting or others.

    - Re-initialize the vairables of struct devfreq_passive_data when
      PROBE_DEFER happens when cpufreq_get() returns NULL.

    - Use dev_err_probe to mute warning when PROBE_DEFER.

    - Fix cpufreq passive unregister erroring on PROBE_DEFER
      by using the allocated parent_cpu_data list to free resouce
      instead of for_each_possible_cpu().

    - Remove duplicate cpufreq passive unregister and warning when
      PROBE_DEFER.

    - Use HZ_PER_KZH macro in units.h.

    - Fix wrong indentation in SPDX-License line.

 2. Fix reference count leak in exynos-ppmu.c by using of_node_put().

 3. Rework freq_table to be local to devfreq struct

    - struct devfreq_dev_profile includes freq_table array to store
      the supported frequencies. If devfreq driver doesn't initialize
      the freq_table, devfreq core allocates the memory and initializes
      the freq_table.

      On a devfreq PROBE_DEFER, the freq_table in the driver profile
      struct is never reset and may be left in an undefined state. To fix
      this and correctly handle PROBE_DEFER, use a local freq_table and
      max_state in the devfreq struct."

* tag 'devfreq-fixes-for-5.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux:
  PM / devfreq: passive: revert an editing accident in SPDX-License line
  PM / devfreq: Fix kernel warning with cpufreq passive register fail
  PM / devfreq: Rework freq_table to be local to devfreq struct
  PM / devfreq: exynos-ppmu: Fix refcount leak in of_get_devfreq_events
  PM / devfreq: passive: Use HZ_PER_KHZ macro in units.h
  PM / devfreq: Fix cpufreq passive unregister erroring on PROBE_DEFER
  PM / devfreq: Mute warning on governor PROBE_DEFER
  PM / devfreq: Fix kernel panic with cpu based scaling to passive gov
This commit is contained in:
Rafael J. Wysocki 2022-06-30 15:30:30 +02:00
commit 589cb2c0b8
4 changed files with 75 additions and 76 deletions
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