[Bug 220013] [REGRESSION, BISECTED] acpi-cpufreq: Boost disablement not being restored after resume from suspend

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=220013

--- Comment #5 from Nicholas Chin (nic.c3.14@gmail.com) ---
I did some more testing and debugging and it seems like when cpufreq_online()
runs after waking the system, policy->boost_enabled and cpufreq_boost_enabled()
are both 0, so the set_boost() at the end of that function is never run.

cpufreq_boost_enabled() being 0 indicates that the MSR has boosting disabled,
but when I read out that MSR using rdmsr the bit seems to indicate that it is
actually enabled (I am aware of the inverted logic of that bit). set_boost()
seems to be the only place in the kernel that causes that MSR to be modified,
and I didn't see any extra calls to it in my debug logs, so it seems like
something else (outside the kernel?) is setting that MSR.

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