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cpufreq: ACPI: call CPUFREQ_POSTCHANGE notfier in error cases

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PRECHANGE and POSTCHANGE notifiers must be called in groups, i.e either both
should be called or both shouldn't be.

In case we have started PRECHANGE notifier and found an error, we
must call POSTCHANGE notifier with freqs.new = freqs.old to
guarantee that the sequence of calling notifiers is complete.

This patch fixes it.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2013-06-19 14:22:55 +05:30 • committed by Rafael J. Wysocki
parent 0956df9c84
commit e15d8309e9
1 changed files with 4 additions and 2 deletions

6
drivers/cpufreq/acpi-cpufreq.c
View file

@ -494,12 +494,14 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
pr_debug("acpi_cpufreq_target failed (%d)\n",
policy->cpu);
result = -EAGAIN;
goto out;
freqs.new = freqs.old;
}
}
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
perf->state = next_perf_state;
if (!result)
perf->state = next_perf_state;
out:
return result;