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OpenCloudOS-Kernel
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cpufreq: s3c64xx: 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 sequence of
calling notifiers is complete.

This patch fixes it.

Cc: Mark Brown <broonie@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Viresh Kumar 2013-06-19 11:18:20 +05:30
parent 44a49a23c9
commit 6cdc9ef32c
1 changed files with 6 additions and 2 deletions
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8
drivers/cpufreq/s3c64xx-cpufreq.c
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@ -104,7 +104,8 @@ static int s3c64xx_cpufreq_set_target(struct cpufreq_policy *policy,
if (ret != 0) {
pr_err("Failed to set VDDARM for %dkHz: %d\n",
freqs.new, ret);
goto err;
freqs.new = freqs.old;
goto post_notify;
}
}
#endif
@ -113,10 +114,13 @@ static int s3c64xx_cpufreq_set_target(struct cpufreq_policy *policy,
if (ret < 0) {
pr_err("Failed to set rate %dkHz: %d\n",
freqs.new, ret);
goto err;
freqs.new = freqs.old;
}
post_notify:
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
if (ret)
goto err;
#ifdef CONFIG_REGULATOR
if (vddarm && freqs.new < freqs.old) {