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cpufreq: preserve user_policy across suspend/resume

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Prevent __cpufreq_add_dev() from overwriting the existing values of
user_policy.{min|max|policy|governor} with defaults during resume
from system suspend.

Fixes: 5302c3fb2e ("cpufreq: Perform light-weight init/teardown during suspend/resume")
Reported-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: 3.12+ <stable@vger.kernel.org> # 3.12+
[rjw: Changelog]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2013-12-24 07:11:01 +05:30 committed by Rafael J. Wysocki
parent 72368d122c
commit 08fd8c1cf0
1 changed files with 9 additions and 5 deletions
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14
drivers/cpufreq/cpufreq.c
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@ -839,9 +839,6 @@ static void cpufreq_init_policy(struct cpufreq_policy *policy)
/* set default policy */
ret = cpufreq_set_policy(policy, &new_policy);
policy->user_policy.policy = policy->policy;
policy->user_policy.governor = policy->governor;
if (ret) {
pr_debug("setting policy failed\n");
if (cpufreq_driver->exit)
@ -1071,8 +1068,10 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif,
*/
cpumask_and(policy->cpus, policy->cpus, cpu_online_mask);
policy->user_policy.min = policy->min;
policy->user_policy.max = policy->max;
if (!frozen) {
policy->user_policy.min = policy->min;
policy->user_policy.max = policy->max;
}
blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
CPUFREQ_START, policy);
@ -1103,6 +1102,11 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif,
cpufreq_init_policy(policy);
if (!frozen) {
policy->user_policy.policy = policy->policy;
policy->user_policy.governor = policy->governor;
}
kobject_uevent(&policy->kobj, KOBJ_ADD);
up_read(&cpufreq_rwsem);