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| author |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2025-03-28 21:39:08 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2025-04-01 18:44:12 +0200 |
| commit | 9e4e249018d208678888bdf22f6b652728106528 (patch) | |
| tree | ec8a7d37973e058126a960f5c7d35f4f700a5ea3 /scripts/lib/kdoc/kdoc_re.py | |
| parent | Merge tag 'pm-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm (diff) | |
| download | wireguard-linux-9e4e249018d208678888bdf22f6b652728106528.tar.xz wireguard-linux-9e4e249018d208678888bdf22f6b652728106528.zip | |
cpufreq: Reference count policy in cpufreq_update_limits()
Since acpi_processor_notify() can be called before registering a cpufreq
driver or even in cases when a cpufreq driver is not registered at all,
cpufreq_update_limits() needs to check if a cpufreq driver is present
and prevent it from being unregistered.
For this purpose, make it call cpufreq_cpu_get() to obtain a cpufreq
policy pointer for the given CPU and reference count the corresponding
policy object, if present.
Fixes: 5a25e3f7cc53 ("cpufreq: intel_pstate: Driver-specific handling of _PPC updates")
Closes: https://lore.kernel.org/linux-acpi/Z-ShAR59cTow0KcR@mail-itl
Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://patch.msgid.link/1928789.tdWV9SEqCh@rjwysocki.net
Diffstat (limited to 'scripts/lib/kdoc/kdoc_re.py')
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