[GIT PULL] devfreq fixes for 5.19-rc5

[GIT PULL] devfreq fixes for 5.19-rc5

[Chanwoo Choi]

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(-)

Re: [GIT PULL] devfreq fixes for 5.19-rc5

[Rafael J. Wysocki]

On Wed, Jun 29, 2022 at 11:32 PM Chanwoo Choi <cwchoi00@gmail.com> wrote:
>
> 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(-)

Pulled and pushed out, thanks!