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

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
index dc10bee75a72..34aab4dd336c 100644
--- a/include/linux/devfreq.h
+++ b/include/linux/devfreq.h
@@ -148,6 +148,8 @@ struct devfreq_stats {
  *		reevaluate operable frequencies. Devfreq users may use
  *		devfreq.nb to the corresponding register notifier call chain.
  * @work:	delayed work for load monitoring.
+ * @freq_table:		current frequency table used by the devfreq driver.
+ * @max_state:		count of entry present in the frequency table.
  * @previous_freq:	previously configured frequency value.
  * @last_status:	devfreq user device info, performance statistics
  * @data:	Private data of the governor. The devfreq framework does not
@@ -185,6 +187,9 @@ struct devfreq {
 	struct notifier_block nb;
 	struct delayed_work work;
 
+	unsigned long *freq_table;
+	unsigned int max_state;
+
 	unsigned long previous_freq;
 	struct devfreq_dev_status last_status;