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From: Christian 'Ansuel' Marangi <ansuelsmth@gmail.com>
To: MyungJoo Ham <myungjoo.ham@samsung.com>,
	Kyungmin Park <kyungmin.park@samsung.com>,
	Chanwoo Choi <cw00.choi@samsung.com>,
	Sibi Sankar <sibis@codeaurora.org>,
	Saravana Kannan <skannan@codeaurora.org>,
	linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Christian 'Ansuel' Marangi <ansuelsmth@gmail.com>
Subject: [PATCH v3 0/5] PM / devfreq: Various Fixes to cpufreq based passive governor
Date: Tue, 14 Jun 2022 13:06:56 +0200	[thread overview]
Message-ID: <20220614110701.31240-1-ansuelsmth@gmail.com> (raw)

While developing a krait cache scaling devfreq driver I encounter tons
of panics and errors with using the new cpufreq passive governor
functions. While the krait cache scaling is still WIP and required some
testing I would like to push all the fixes to make the new
implementation wroking since currently with a the governor
PROBE_DEFERRing all sort of things happen from kernel panic from invalid
address access to freq_table getting corrupted.

With the following fixes my WIP driver works correctly without any
warning/problems. 

v3:
- Fix compilation error for list_for_each_entry_safe (i'm stupid -.-''')
v2:
- Fix wrong list_for_each_entry reported by Dan Carpenter

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

 drivers/devfreq/devfreq.c          | 75 ++++++++++++++----------------
 drivers/devfreq/governor_passive.c | 41 ++++++----------
 include/linux/devfreq.h            |  4 ++
 3 files changed, 54 insertions(+), 66 deletions(-)

-- 
2.36.1


             reply	other threads:[~2022-06-14 11:07 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-14 11:06 Christian 'Ansuel' Marangi [this message]
2022-06-14 11:06 ` [PATCH v3 1/5] PM / devfreq: Fix cpufreq passive unregister erroring on PROBE_DEFER Christian 'Ansuel' Marangi
2022-06-14 22:58   ` Chanwoo Choi
2022-06-14 22:07     ` Ansuel Smith
2022-06-14 23:12       ` Chanwoo Choi
2022-06-14 11:06 ` [PATCH v3 2/5] PM / devfreq: Fix kernel warning with cpufreq passive register fail Christian 'Ansuel' Marangi
2022-06-14 11:06 ` [PATCH v3 3/5] PM / devfreq: Fix kernel panic with cpu based scaling to passive gov Christian 'Ansuel' Marangi
2022-06-14 23:06   ` Chanwoo Choi
2022-06-14 11:07 ` [PATCH v3 4/5] PM / devfreq: Rework freq_table to be local to devfreq struct Christian 'Ansuel' Marangi
2022-06-14 11:07 ` [PATCH v3 5/5] PM / devfreq: Mute warning on governor PROBE_DEFER Christian 'Ansuel' Marangi
2022-06-14 23:10   ` Chanwoo Choi

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