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path: root/drivers/thermal/cpufreq_cooling.c
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Diffstat (limited to 'drivers/thermal/cpufreq_cooling.c')
-rw-r--r--drivers/thermal/cpufreq_cooling.c45
1 files changed, 37 insertions, 8 deletions
diff --git a/drivers/thermal/cpufreq_cooling.c b/drivers/thermal/cpufreq_cooling.c
index e2cc7bd308..9d1b145970 100644
--- a/drivers/thermal/cpufreq_cooling.c
+++ b/drivers/thermal/cpufreq_cooling.c
@@ -91,12 +91,16 @@ struct cpufreq_cooling_device {
static unsigned long get_level(struct cpufreq_cooling_device *cpufreq_cdev,
unsigned int freq)
{
+ struct em_perf_state *table;
int i;
+ rcu_read_lock();
+ table = em_perf_state_from_pd(cpufreq_cdev->em);
for (i = cpufreq_cdev->max_level - 1; i >= 0; i--) {
- if (freq > cpufreq_cdev->em->table[i].frequency)
+ if (freq > table[i].frequency)
break;
}
+ rcu_read_unlock();
return cpufreq_cdev->max_level - i - 1;
}
@@ -104,16 +108,20 @@ static unsigned long get_level(struct cpufreq_cooling_device *cpufreq_cdev,
static u32 cpu_freq_to_power(struct cpufreq_cooling_device *cpufreq_cdev,
u32 freq)
{
+ struct em_perf_state *table;
unsigned long power_mw;
int i;
+ rcu_read_lock();
+ table = em_perf_state_from_pd(cpufreq_cdev->em);
for (i = cpufreq_cdev->max_level - 1; i >= 0; i--) {
- if (freq > cpufreq_cdev->em->table[i].frequency)
+ if (freq > table[i].frequency)
break;
}
- power_mw = cpufreq_cdev->em->table[i + 1].power;
+ power_mw = table[i + 1].power;
power_mw /= MICROWATT_PER_MILLIWATT;
+ rcu_read_unlock();
return power_mw;
}
@@ -121,18 +129,24 @@ static u32 cpu_freq_to_power(struct cpufreq_cooling_device *cpufreq_cdev,
static u32 cpu_power_to_freq(struct cpufreq_cooling_device *cpufreq_cdev,
u32 power)
{
+ struct em_perf_state *table;
unsigned long em_power_mw;
+ u32 freq;
int i;
+ rcu_read_lock();
+ table = em_perf_state_from_pd(cpufreq_cdev->em);
for (i = cpufreq_cdev->max_level; i > 0; i--) {
/* Convert EM power to milli-Watts to make safe comparison */
- em_power_mw = cpufreq_cdev->em->table[i].power;
+ em_power_mw = table[i].power;
em_power_mw /= MICROWATT_PER_MILLIWATT;
if (power >= em_power_mw)
break;
}
+ freq = table[i].frequency;
+ rcu_read_unlock();
- return cpufreq_cdev->em->table[i].frequency;
+ return freq;
}
/**
@@ -262,8 +276,9 @@ static int cpufreq_get_requested_power(struct thermal_cooling_device *cdev,
static int cpufreq_state2power(struct thermal_cooling_device *cdev,
unsigned long state, u32 *power)
{
- unsigned int freq, num_cpus, idx;
struct cpufreq_cooling_device *cpufreq_cdev = cdev->devdata;
+ unsigned int freq, num_cpus, idx;
+ struct em_perf_state *table;
/* Request state should be less than max_level */
if (state > cpufreq_cdev->max_level)
@@ -272,7 +287,12 @@ static int cpufreq_state2power(struct thermal_cooling_device *cdev,
num_cpus = cpumask_weight(cpufreq_cdev->policy->cpus);
idx = cpufreq_cdev->max_level - state;
- freq = cpufreq_cdev->em->table[idx].frequency;
+
+ rcu_read_lock();
+ table = em_perf_state_from_pd(cpufreq_cdev->em);
+ freq = table[idx].frequency;
+ rcu_read_unlock();
+
*power = cpu_freq_to_power(cpufreq_cdev, freq) * num_cpus;
return 0;
@@ -378,8 +398,17 @@ static unsigned int get_state_freq(struct cpufreq_cooling_device *cpufreq_cdev,
#ifdef CONFIG_THERMAL_GOV_POWER_ALLOCATOR
/* Use the Energy Model table if available */
if (cpufreq_cdev->em) {
+ struct em_perf_state *table;
+ unsigned int freq;
+
idx = cpufreq_cdev->max_level - state;
- return cpufreq_cdev->em->table[idx].frequency;
+
+ rcu_read_lock();
+ table = em_perf_state_from_pd(cpufreq_cdev->em);
+ freq = table[idx].frequency;
+ rcu_read_unlock();
+
+ return freq;
}
#endif