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cpufreq: pcc: call CPUFREQ_POSTCHANGE notfier in error cases 

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 14:23:03 +05:30 committed by Rafael J. Wysocki
parent 567f4f6727
commit f77f146599
1 changed files with 2 additions and 0 deletions
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2
drivers/cpufreq/pcc-cpufreq.c
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@ -243,6 +243,8 @@ static int pcc_cpufreq_target(struct cpufreq_policy *policy,
return 0; return 0;
cmd_incomplete: cmd_incomplete:
freqs.new = freqs.old;
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
iowrite16(0, &pcch_hdr->status); iowrite16(0, &pcch_hdr->status);
spin_unlock(&pcc_lock); spin_unlock(&pcc_lock);
return -EINVAL; return -EINVAL;