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Commit 3bd8f7d8 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal 

Pull thermal fixes from Eduardo Valentin:
 "Last minute fixes on the thermal-soc tree.  There is a fix of a long
  lasting bug in cpu cooling device, thanks for RMK for being pushing
  this"

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal:
  thermal/cpu_cooling: update policy limits if clipped_freq < policy->max
  thermal/cpu_cooling: rename max_freq as clipped_freq in notifier
  thermal/cpu_cooling: rename cpufreq_val as clipped_freq
  thermal/cpu_cooling: convert 'switch' block to 'if' block in notifier
  thermal/cpu_cooling: quit early after updating policy
  thermal/cpu_cooling: No need to initialize max_freq to 0
  thermal: cpu_cooling: fix lockdep problems in cpu_cooling
  thermal: power_allocator: do not use devm* interfaces
parents 1b647a16 1afb9c53

drivers/thermal/cpu_cooling.c

+44 −29
Original line number Diff line number Diff line
@@ -68,7 +68,7 @@ struct power_table { 
 *	registered cooling device.

 * @cpufreq_state: integer value representing the current state of cpufreq

 *	cooling	devices.

 * @cpufreq_val: integer value representing the absolute value of the clipped

 * @clipped_freq: integer value representing the absolute value of the clipped

 *	frequency.

 * @max_level: maximum cooling level. One less than total number of valid

 *	cpufreq frequencies.
@@ -91,7 +91,7 @@ struct cpufreq_cooling_device { 
	int id;

	struct thermal_cooling_device *cool_dev;

	unsigned int cpufreq_state;

	unsigned int cpufreq_val;

	unsigned int clipped_freq;

	unsigned int max_level;

	unsigned int *freq_table;	/* In descending order */

	struct cpumask allowed_cpus;
@@ -107,6 +107,9 @@ struct cpufreq_cooling_device { 
static DEFINE_IDR(cpufreq_idr);

static DEFINE_MUTEX(cooling_cpufreq_lock);



static unsigned int cpufreq_dev_count;



static DEFINE_MUTEX(cooling_list_lock);

static LIST_HEAD(cpufreq_dev_list);



/**
@@ -185,14 +188,14 @@ unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq) 
{

	struct cpufreq_cooling_device *cpufreq_dev;



	mutex_lock(&cooling_cpufreq_lock);

	mutex_lock(&cooling_list_lock);

	list_for_each_entry(cpufreq_dev, &cpufreq_dev_list, node) {

		if (cpumask_test_cpu(cpu, &cpufreq_dev->allowed_cpus)) {

			mutex_unlock(&cooling_cpufreq_lock);

			mutex_unlock(&cooling_list_lock);

			return get_level(cpufreq_dev, freq);

		}

	}

	mutex_unlock(&cooling_cpufreq_lock);

	mutex_unlock(&cooling_list_lock);



	pr_err("%s: cpu:%d not part of any cooling device\n", __func__, cpu);

	return THERMAL_CSTATE_INVALID;
@@ -215,29 +218,35 @@ static int cpufreq_thermal_notifier(struct notifier_block *nb, 
				    unsigned long event, void *data)

{

	struct cpufreq_policy *policy = data;

	unsigned long max_freq = 0;

	unsigned long clipped_freq;

	struct cpufreq_cooling_device *cpufreq_dev;



	switch (event) {

	if (event != CPUFREQ_ADJUST)

		return NOTIFY_DONE;



	case CPUFREQ_ADJUST:

		mutex_lock(&cooling_cpufreq_lock);

	mutex_lock(&cooling_list_lock);

	list_for_each_entry(cpufreq_dev, &cpufreq_dev_list, node) {

			if (!cpumask_test_cpu(policy->cpu,

					      &cpufreq_dev->allowed_cpus))

		if (!cpumask_test_cpu(policy->cpu, &cpufreq_dev->allowed_cpus))

			continue;



			max_freq = cpufreq_dev->cpufreq_val;

		/*

		 * policy->max is the maximum allowed frequency defined by user

		 * and clipped_freq is the maximum that thermal constraints

		 * allow.

		 *

		 * If clipped_freq is lower than policy->max, then we need to

		 * readjust policy->max.

		 *

		 * But, if clipped_freq is greater than policy->max, we don't

		 * need to do anything.

		 */

		clipped_freq = cpufreq_dev->clipped_freq;



			if (policy->max != max_freq)

				cpufreq_verify_within_limits(policy, 0,

							     max_freq);

		}

		mutex_unlock(&cooling_cpufreq_lock);

		if (policy->max > clipped_freq)

			cpufreq_verify_within_limits(policy, 0, clipped_freq);

		break;

	default:

		return NOTIFY_DONE;

	}

	mutex_unlock(&cooling_list_lock);



	return NOTIFY_OK;

}
@@ -519,7 +528,7 @@ static int cpufreq_set_cur_state(struct thermal_cooling_device *cdev, 


	clip_freq = cpufreq_device->freq_table[state];

	cpufreq_device->cpufreq_state = state;

	cpufreq_device->cpufreq_val = clip_freq;

	cpufreq_device->clipped_freq = clip_freq;



	cpufreq_update_policy(cpu);
@@ -861,17 +870,19 @@ __cpufreq_cooling_register(struct device_node *np, 
			pr_debug("%s: freq:%u KHz\n", __func__, freq);

	}



	cpufreq_dev->cpufreq_val = cpufreq_dev->freq_table[0];

	cpufreq_dev->clipped_freq = cpufreq_dev->freq_table[0];

	cpufreq_dev->cool_dev = cool_dev;



	mutex_lock(&cooling_cpufreq_lock);



	mutex_lock(&cooling_list_lock);

	list_add(&cpufreq_dev->node, &cpufreq_dev_list);

	mutex_unlock(&cooling_list_lock);



	/* Register the notifier for first cpufreq cooling device */

	if (list_empty(&cpufreq_dev_list))

	if (!cpufreq_dev_count++)

		cpufreq_register_notifier(&thermal_cpufreq_notifier_block,

					  CPUFREQ_POLICY_NOTIFIER);

	list_add(&cpufreq_dev->node, &cpufreq_dev_list);



	mutex_unlock(&cooling_cpufreq_lock);



	return cool_dev;
@@ -1013,13 +1024,17 @@ void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev) 
		return;



	cpufreq_dev = cdev->devdata;

	mutex_lock(&cooling_cpufreq_lock);

	list_del(&cpufreq_dev->node);



	/* Unregister the notifier for the last cpufreq cooling device */

	if (list_empty(&cpufreq_dev_list))

	mutex_lock(&cooling_cpufreq_lock);

	if (!--cpufreq_dev_count)

		cpufreq_unregister_notifier(&thermal_cpufreq_notifier_block,

					    CPUFREQ_POLICY_NOTIFIER);



	mutex_lock(&cooling_list_lock);

	list_del(&cpufreq_dev->node);

	mutex_unlock(&cooling_list_lock);



	mutex_unlock(&cooling_cpufreq_lock);



	thermal_cooling_device_unregister(cpufreq_dev->cool_dev);

drivers/thermal/power_allocator.c

+4 −4
Original line number Diff line number Diff line
@@ -334,7 +334,7 @@ static int allocate_power(struct thermal_zone_device *tz, 
				      max_allocatable_power, current_temp,

				      (s32)control_temp - (s32)current_temp);



	devm_kfree(&tz->device, req_power);

	kfree(req_power);

unlock:

	mutex_unlock(&tz->lock);
@@ -426,7 +426,7 @@ static int power_allocator_bind(struct thermal_zone_device *tz) 
		return -EINVAL;

	}



	params = devm_kzalloc(&tz->device, sizeof(*params), GFP_KERNEL);

	params = kzalloc(sizeof(*params), GFP_KERNEL);

	if (!params)

		return -ENOMEM;
@@ -468,14 +468,14 @@ static int power_allocator_bind(struct thermal_zone_device *tz) 
	return 0;



free:

	devm_kfree(&tz->device, params);

	kfree(params);

	return ret;

}



static void power_allocator_unbind(struct thermal_zone_device *tz)

{

	dev_dbg(&tz->device, "Unbinding from thermal zone %d\n", tz->id);

	devm_kfree(&tz->device, tz->governor_data);

	kfree(tz->governor_data);

	tz->governor_data = NULL;

}