linux-kernel - [GIT PULL] devfreq fixes for 5.19-rc5

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Date:   Thu, 30 Jun 2022 06:32:29 +0900
From:   Chanwoo Choi <cwchoi00@...il.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     "open list:DEVICE FREQUENCY (DEVFREQ)" <linux-pm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Chanwoo Choi <chanwoo@...nel.org>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>
Subject: [GIT PULL] devfreq fixes for 5.19-rc5

Dear Rafael,

This is devfreq-fixes pull request for v5.19-rc5. I add detailed description of
this pull request on the following tag. Please pull devfreq with
following updates.

Best Regards,
Chanwoo Choi


The following changes since commit 03c765b0e3b4cb5063276b086c76f7a612856a9a:

  Linux 5.19-rc4 (2022-06-26 14:22:10 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git tags/devfreq-fixes-for-5.19-rc5

for you to fetch changes up to f08fe6fcbe13f83558ecccc4acaf5af3dce71a1f:

  PM / devfreq: passive: revert an editing accident in SPDX-License line (2022-06-30 05:11:17 +0900)

----------------------------------------------------------------

Update devfreq for 5.19-rc5

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.

----------------------------------------------------------------
Christian Marangi (5):
      PM / devfreq: Fix kernel panic with cpu based scaling to passive gov
      PM / devfreq: Mute warning on governor PROBE_DEFER
      PM / devfreq: Fix cpufreq passive unregister erroring on PROBE_DEFER
      PM / devfreq: Rework freq_table to be local to devfreq struct
      PM / devfreq: Fix kernel warning with cpufreq passive register fail

Lukas Bulwahn (1):
      PM / devfreq: passive: revert an editing accident in SPDX-License line

Miaoqian Lin (1):
      PM / devfreq: exynos-ppmu: Fix refcount leak in of_get_devfreq_events

Yicong Yang (1):
      PM / devfreq: passive: Use HZ_PER_KHZ macro in units.h

 drivers/devfreq/devfreq.c           | 76 ++++++++++++++++++-------------------
 drivers/devfreq/event/exynos-ppmu.c |  8 +++-
 drivers/devfreq/governor_passive.c  | 62 +++++++++++++-----------------
 include/linux/devfreq.h             |  5 +++
 4 files changed, 75 insertions(+), 76 deletions(-)