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cpufreq: Properly handle errors from cpufreq_init_policy()

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cpufreq_init_policy() can fail, and we don't do anything except a call
to ->exit() on that. The policy should be freed if this happens.

Do it properly.

Reported-and-tested-by: "Jon Medhurst (Tixy)" <tixy@linaro.org>
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 2015-07-08 15:12:16 +05:30 committed by Rafael J. Wysocki
parent 8101f99703
commit 7f0fa40f5a
1 changed files with 11 additions and 9 deletions
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20
drivers/cpufreq/cpufreq.c
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@ -1060,11 +1060,10 @@ static int cpufreq_add_dev_interface(struct cpufreq_policy *policy,
return cpufreq_add_dev_symlink(policy);
}
static void cpufreq_init_policy(struct cpufreq_policy *policy)
static int cpufreq_init_policy(struct cpufreq_policy *policy)
{
struct cpufreq_governor *gov = NULL;
struct cpufreq_policy new_policy;
int ret = 0;
memcpy(&new_policy, policy, sizeof(*policy));
@ -1083,12 +1082,7 @@ static void cpufreq_init_policy(struct cpufreq_policy *policy)
cpufreq_parse_governor(gov->name, &new_policy.policy, NULL);
/* set default policy */
ret = cpufreq_set_policy(policy, &new_policy);
if (ret) {
pr_debug("setting policy failed\n");
if (cpufreq_driver->exit)
cpufreq_driver->exit(policy);
}
return cpufreq_set_policy(policy, &new_policy);
}
static int cpufreq_add_policy_cpu(struct cpufreq_policy *policy,
@ -1386,7 +1380,12 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
write_unlock_irqrestore(&cpufreq_driver_lock, flags);
}
cpufreq_init_policy(policy);
ret = cpufreq_init_policy(policy);
if (ret) {
pr_err("%s: Failed to initialize policy for cpu: %d (%d)\n",
__func__, cpu, ret);
goto out_remove_policy_notify;
}
if (!recover_policy) {
policy->user_policy.policy = policy->policy;
@ -1406,6 +1405,9 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
return 0;
out_remove_policy_notify:
/* cpufreq_policy_free() will notify based on this */
recover_policy = true;
out_exit_policy:
up_write(&policy->rwsem);