[PATCH v3 06/12] PM / devfreq: Use scope-based cleanup helper

[Zihuan Zhang]

Replace the manual cpufreq_cpu_put() with __free(put_cpufreq_policy)
annotation for policy references. This reduces the risk of reference
counting mistakes and aligns the code with the latest kernel style.

No functional change intended.

Signed-off-by: Zihuan Zhang <zhangzihuan@xxxxxxxxxx>
---
 drivers/devfreq/governor_passive.c | 25 +++++++++----------------
 1 file changed, 9 insertions(+), 16 deletions(-)

diff --git a/drivers/devfreq/governor_passive.c b/drivers/devfreq/governor_passive.c
index 953cf9a1e9f7..a035cf44bdb8 100644
--- a/drivers/devfreq/governor_passive.c
+++ b/drivers/devfreq/governor_passive.c
@@ -80,24 +80,23 @@ static int get_target_freq_with_cpufreq(struct devfreq *devfreq,
 	struct devfreq_passive_data *p_data =
 				(struct devfreq_passive_data *)devfreq->data;
 	struct devfreq_cpu_data *parent_cpu_data;
-	struct cpufreq_policy *policy;
 	unsigned long cpu, cpu_cur, cpu_min, cpu_max, cpu_percent;
 	unsigned long dev_min, dev_max;
 	unsigned long freq = 0;
 	int ret = 0;
 
 	for_each_online_cpu(cpu) {
-		policy = cpufreq_cpu_get(cpu);
+		struct cpufreq_policy *policy __free(put_cpufreq_policy) =
+			cpufreq_cpu_get(cpu);
+
 		if (!policy) {
 			ret = -EINVAL;
 			continue;
 		}
 
 		parent_cpu_data = get_parent_cpu_data(p_data, policy);
-		if (!parent_cpu_data) {
-			cpufreq_cpu_put(policy);
+		if (!parent_cpu_data)
 			continue;
-		}
 
 		/* Get target freq via required opps */
 		cpu_cur = parent_cpu_data->cur_freq * HZ_PER_KHZ;
@@ -106,7 +105,6 @@ static int get_target_freq_with_cpufreq(struct devfreq *devfreq,
 					devfreq->opp_table, &cpu_cur);
 		if (freq) {
 			*target_freq = max(freq, *target_freq);
-			cpufreq_cpu_put(policy);
 			continue;
 		}
 
@@ -121,7 +119,6 @@ static int get_target_freq_with_cpufreq(struct devfreq *devfreq,
 		freq = dev_min + mult_frac(dev_max - dev_min, cpu_percent, 100);
 
 		*target_freq = max(freq, *target_freq);
-		cpufreq_cpu_put(policy);
 	}
 
 	return ret;
@@ -256,7 +253,6 @@ static int cpufreq_passive_register_notifier(struct devfreq *devfreq)
 	struct device *dev = devfreq->dev.parent;
 	struct opp_table *opp_table = NULL;
 	struct devfreq_cpu_data *parent_cpu_data;
-	struct cpufreq_policy *policy;
 	struct device *cpu_dev;
 	unsigned int cpu;
 	int ret;
@@ -273,23 +269,23 @@ static int cpufreq_passive_register_notifier(struct devfreq *devfreq)
 	}
 
 	for_each_possible_cpu(cpu) {
-		policy = cpufreq_cpu_get(cpu);
+		struct cpufreq_policy *policy __free(put_cpufreq_policy) =
+			cpufreq_cpu_get(cpu);
+
 		if (!policy) {
 			ret = -EPROBE_DEFER;
 			goto err;
 		}
 
 		parent_cpu_data = get_parent_cpu_data(p_data, policy);
-		if (parent_cpu_data) {
-			cpufreq_cpu_put(policy);
+		if (parent_cpu_data)
 			continue;
-		}
 
 		parent_cpu_data = kzalloc(sizeof(*parent_cpu_data),
 						GFP_KERNEL);
 		if (!parent_cpu_data) {
 			ret = -ENOMEM;
-			goto err_put_policy;
+			goto err;
 		}
 
 		cpu_dev = get_cpu_device(cpu);
@@ -314,7 +310,6 @@ static int cpufreq_passive_register_notifier(struct devfreq *devfreq)
 		parent_cpu_data->max_freq = policy->cpuinfo.max_freq;
 
 		list_add_tail(&parent_cpu_data->node, &p_data->cpu_data_list);
-		cpufreq_cpu_put(policy);
 	}
 
 	mutex_lock(&devfreq->lock);
@@ -327,8 +322,6 @@ static int cpufreq_passive_register_notifier(struct devfreq *devfreq)
 
 err_free_cpu_data:
 	kfree(parent_cpu_data);
-err_put_policy:
-	cpufreq_cpu_put(policy);
 err:
 
 	return ret;
-- 
2.25.1