cpufreq: governor: Avoid invalid states with additional checks

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There can be races where the request has come to a wrong state. For
example INIT followed by STOP (instead of START) or START followed by
EXIT (instead of STOP).

Address these races by making sure the state-machine never gets into
any invalid state. Also return an error if an invalid state-transition
is requested.

Reviewed-and-tested-by: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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Viresh Kumar 2015-07-18 11:31:01 +05:30 • committed by Rafael J. Wysocki

parent 43e0ee361e

commit a72c49590a

1 changed files with 35 additions and 11 deletions

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drivers/cpufreq/cpufreq_governor.c

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