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cpufreq: Prevent memory leak in cpufreq_stats on hotplug

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Ensures that cpufreq_stats_free_table is called before
__cpufreq_remove_dev on cpu hotplug (which also occurs during
suspend on SMP systems) to make sure that sysfs_remove_group
can get called before the cpufreq kobj is freed.  Otherwise,
the sysfs file structures are leaked.

Change-Id: I87e55277272f5cfad47e9e7c92630e990bb90069
Signed-off-by: Colin Cross <ccross@android.com>
This commit is contained in:
Colin Cross 2011-01-28 19:32:31 -08:00 committed by Arve Hjønnevåg
parent 879d744033
commit 32d3498d04
1 changed files with 25 additions and 0 deletions
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25
drivers/cpufreq/cpufreq_stats.c
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@ -341,6 +341,27 @@ static int cpufreq_stat_notifier_trans(struct notifier_block *nb,
return 0;
}
static int cpufreq_stats_create_table_cpu(unsigned int cpu)
{
struct cpufreq_policy *policy;
struct cpufreq_frequency_table *table;
int ret = -ENODEV;
policy = cpufreq_cpu_get(cpu);
if (!policy)
return -ENODEV;
table = cpufreq_frequency_get_table(cpu);
if (!table)
goto out;
ret = cpufreq_stats_create_table(policy, table);
out:
cpufreq_cpu_put(policy);
return ret;
}
static int __cpuinit cpufreq_stat_cpu_callback(struct notifier_block *nfb,
unsigned long action,
void *hcpu)
@ -361,6 +382,10 @@ static int __cpuinit cpufreq_stat_cpu_callback(struct notifier_block *nfb,
cpufreq_stats_free_sysfs(cpu);
cpufreq_stats_free_table(cpu);
break;
case CPU_DOWN_FAILED:
case CPU_DOWN_FAILED_FROZEN:
cpufreq_stats_create_table_cpu(cpu);
break;
}
return NOTIFY_OK;
}