[PATCH 4/8] cpufreq: Extract non-interface related stuff fromcpufreq_add_dev_interface

From: Srivatsa S. Bhat
Date: Thu Jul 11 2013 - 18:24:22 EST


cpufreq_add_dev_interface() includes the work of exposing the interface
to the device, as well as a lot of unrelated stuff. Move the latter to
cpufreq_add_dev(), where it is more appropriate.

Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@xxxxxxxxxxxxxxxxxx>
---

drivers/cpufreq/cpufreq.c | 43 ++++++++++++++++++++++++++-----------------
1 file changed, 26 insertions(+), 17 deletions(-)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index ca14dc2..2ab39f3 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -834,11 +834,8 @@ static int cpufreq_add_dev_interface(unsigned int cpu,
struct cpufreq_policy *policy,
struct device *dev)
{
- struct cpufreq_policy new_policy;
struct freq_attr **drv_attr;
- unsigned long flags;
int ret = 0;
- unsigned int j;

/* prepare interface data */
ret = kobject_init_and_add(&policy->kobj, &ktype_cpufreq,
@@ -870,17 +867,23 @@ static int cpufreq_add_dev_interface(unsigned int cpu,
goto err_out_kobj_put;
}

- write_lock_irqsave(&cpufreq_driver_lock, flags);
- for_each_cpu(j, policy->cpus) {
- per_cpu(cpufreq_cpu_data, j) = policy;
- per_cpu(cpufreq_policy_cpu, j) = policy->cpu;
- }
- write_unlock_irqrestore(&cpufreq_driver_lock, flags);
-
ret = cpufreq_add_dev_symlink(cpu, policy);
if (ret)
goto err_out_kobj_put;

+ return ret;
+
+err_out_kobj_put:
+ kobject_put(&policy->kobj);
+ wait_for_completion(&policy->kobj_unregister);
+ return ret;
+}
+
+static void cpufreq_init_policy(struct cpufreq_policy *policy)
+{
+ struct cpufreq_policy new_policy;
+ int ret = 0;
+
memcpy(&new_policy, policy, sizeof(struct cpufreq_policy));
/* assure that the starting sequence is run in __cpufreq_set_policy */
policy->governor = NULL;
@@ -895,12 +898,6 @@ static int cpufreq_add_dev_interface(unsigned int cpu,
if (cpufreq_driver->exit)
cpufreq_driver->exit(policy);
}
- return ret;
-
-err_out_kobj_put:
- kobject_put(&policy->kobj);
- wait_for_completion(&policy->kobj_unregister);
- return ret;
}

#ifdef CONFIG_HOTPLUG_CPU
@@ -1074,10 +1071,19 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
}
#endif

+ write_lock_irqsave(&cpufreq_driver_lock, flags);
+ for_each_cpu(j, policy->cpus) {
+ per_cpu(cpufreq_cpu_data, j) = policy;
+ per_cpu(cpufreq_policy_cpu, j) = policy->cpu;
+ }
+ write_unlock_irqrestore(&cpufreq_driver_lock, flags);
+
ret = cpufreq_add_dev_interface(cpu, policy, dev);
if (ret)
goto err_out_unregister;

+ cpufreq_init_policy(policy);
+
kobject_uevent(&policy->kobj, KOBJ_ADD);
module_put(cpufreq_driver->owner);
pr_debug("initialization complete\n");
@@ -1086,8 +1092,11 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)

err_out_unregister:
write_lock_irqsave(&cpufreq_driver_lock, flags);
- for_each_cpu(j, policy->cpus)
+ for_each_cpu(j, policy->cpus) {
per_cpu(cpufreq_cpu_data, j) = NULL;
+ if (j != cpu)
+ per_cpu(cpufreq_policy_cpu, j) = -1;
+ }
write_unlock_irqrestore(&cpufreq_driver_lock, flags);

kobject_put(&policy->kobj);

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