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authorSai Gurrappadi <sgurrappadi@nvidia.com>2016-04-29 14:44:37 -0700
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-05-05 01:30:38 +0200
commite43e94c1eda76dabd686ddf6f7825f54d747b310 (patch)
tree9668779f7f97f3fbd76e3e9a9876be69bfc74fe8 /usr
parent9f123def55d3fd0d76d49e0009419bcb994f6f1f (diff)
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cpufreq: Fix GOV_LIMITS handling for the userspace governor
Currently, the userspace governor only updates frequency on GOV_LIMITS if policy->cur falls outside policy->{min/max}. However, it is also necessary to update current frequency on GOV_LIMITS to match the user requested value if it can be achieved within the new policy->{max/min}. This was previously the behaviour in the governor until commit d1922f0 ("cpufreq: Simplify userspace governor") which incorrectly assumed that policy->cur == user requested frequency via scaling_setspeed. This won't be true if the user requested frequency falls outside policy->{min/max}. Ex: a temporary thermal cap throttled the user requested frequency. Fix this by storing the user requested frequency in a seperate variable. The governor will then try to achieve this request on every GOV_LIMITS change. Fixes: d1922f02562f (cpufreq: Simplify userspace governor) Signed-off-by: Sai Gurrappadi <sgurrappadi@nvidia.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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