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| author | Colin Cross <ccross@android.com> | 2011-01-28 19:32:31 -0800 |
|---|---|---|
| committer | Colin Cross <ccross@android.com> | 2011-06-14 09:09:51 -0700 |
| commit | d20e6ae8aceb712a3c74263f17c28ca63bb2a677 (patch) | |
| tree | 3fe4a1911955b5fe41ca8602fc4845de7a845caf /drivers/cpufreq/cpufreq_stats.c | |
| parent | 8e42bee3ab6a46c6ac8c9754efb3dde29b9762b2 (diff) | |
| download | kernel_samsung_tuna-d20e6ae8aceb712a3c74263f17c28ca63bb2a677.zip kernel_samsung_tuna-d20e6ae8aceb712a3c74263f17c28ca63bb2a677.tar.gz kernel_samsung_tuna-d20e6ae8aceb712a3c74263f17c28ca63bb2a677.tar.bz2 | |
cpufreq: Prevent memory leak in cpufreq_stats on hotplug
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>
Diffstat (limited to 'drivers/cpufreq/cpufreq_stats.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq_stats.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c index b60a4c2..16f6f4b 100644 --- a/drivers/cpufreq/cpufreq_stats.c +++ b/drivers/cpufreq/cpufreq_stats.c @@ -315,6 +315,27 @@ 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) @@ -333,6 +354,10 @@ static int __cpuinit cpufreq_stat_cpu_callback(struct notifier_block *nfb, case CPU_DEAD_FROZEN: 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; } |