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Commit8e461a1cb4("cpufreq: schedutil: Fix superfluous updates caused by need_freq_update") modified sugov_should_update_freq() to set the need_freq_update flag only for drivers with CPUFREQ_NEED_UPDATE_LIMITS set, but that flag generally needs to be set when the policy limits change because the driver callback may need to be invoked for the new limits to take effect. However, if the return value of cpufreq_driver_resolve_freq() after applying the new limits is still equal to the previously selected frequency, the driver callback needs to be invoked only in the case when CPUFREQ_NEED_UPDATE_LIMITS is set (which means that the driver specifically wants its callback to be invoked every time the policy limits change). Update the code accordingly to avoid missing policy limits changes for drivers without CPUFREQ_NEED_UPDATE_LIMITS. Fixes:8e461a1cb4("cpufreq: schedutil: Fix superfluous updates caused by need_freq_update") Closes: https://lore.kernel.org/lkml/Z_Tlc6Qs-tYpxWYb@linaro.org/ Reported-by: Stephan Gerhold <stephan.gerhold@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Christian Loehle <christian.loehle@arm.com> Link: https://patch.msgid.link/3010358.e9J7NaK4W3@rjwysocki.net
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.