linux-kernel - [GIT PULL] Power management fixes for v5.15-rc2

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Date:   Fri, 17 Sep 2021 20:21:29 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Linux PM <linux-pm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [GIT PULL] Power management fixes for v5.15-rc2

Hi Linus,

Please pull from the tag

 git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git \
 pm-5.15-rc2

with top-most commit cdef1196608892b9a46caa5f2b64095a7f0be60c

 cpufreq: schedutil: Destroy mutex before kobject_put() frees the memory

on top of commit 6880fa6c56601bb8ed59df6c30fd390cc5f6dd8f

 Linux 5.15-rc1

to receive power management fixes for 5.15-rc2.

These fix two cpufreq issues, one in the intel_pstate driver and one
in the core.

Specifics:

 - Prevent intel_pstate from avoiding to use HWP, even if instructed
   to do so via the kernel command line, when HWP has been enabled
   already by the platform firmware (Doug Smythies).

 - Prevent use-after-free from occurring in the schedutil cpufreq
   governor on exit by fixing a core helper function that attempts
   to access memory associated with a kobject after calling
   kobject_put() on it (James Morse).

Thanks!


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

Doug Smythies (1):
      cpufreq: intel_pstate: Override parameters if HWP forced by BIOS

James Morse (1):
      cpufreq: schedutil: Destroy mutex before kobject_put() frees the memory

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

 drivers/cpufreq/cpufreq_governor_attr_set.c |  2 +-
 drivers/cpufreq/intel_pstate.c              | 22 ++++++++++++++--------
 2 files changed, 15 insertions(+), 9 deletions(-)