1 files changed, 16 insertions, 45 deletions

diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
index b7c688a5659c..4a17162a392d 100644
--- a/drivers/cpufreq/cppc_cpufreq.c
+++ b/drivers/cpufreq/cppc_cpufreq.c
@@ -26,14 +26,6 @@
 
 #include <acpi/cppc_acpi.h>
 
-/*
- * This list contains information parsed from per CPU ACPI _CPC and _PSD
- * structures: e.g. the highest and lowest supported performance, capabilities,
- * desired performance, level requested etc. Depending on the share_type, not
- * all CPUs will have an entry in the list.
- */
-static LIST_HEAD(cpu_data_list);
-
 static struct cpufreq_driver cppc_cpufreq_driver;
 
 #ifdef CONFIG_ACPI_CPPC_CPUFREQ_FIE
@@ -352,7 +344,6 @@ static unsigned int cppc_cpufreq_get_transition_delay_us(unsigned int cpu)
 #if defined(CONFIG_ARM64) && defined(CONFIG_ENERGY_MODEL)
 
 static DEFINE_PER_CPU(unsigned int, efficiency_class);
-static void cppc_cpufreq_register_em(struct cpufreq_policy *policy);
 
 /* Create an artificial performance state every CPPC_EM_CAP_STEP capacity unit. */
 #define CPPC_EM_CAP_STEP	(20)
@@ -488,7 +479,19 @@ static int cppc_get_cpu_cost(struct device *cpu_dev, unsigned long KHz,
 	return 0;
 }
 
-static int populate_efficiency_class(void)
+static void cppc_cpufreq_register_em(struct cpufreq_policy *policy)
+{
+	struct cppc_cpudata *cpu_data;
+	struct em_data_callback em_cb =
+		EM_ADV_DATA_CB(cppc_get_cpu_power, cppc_get_cpu_cost);
+
+	cpu_data = policy->driver_data;
+	em_dev_register_perf_domain(get_cpu_device(policy->cpu),
+			get_perf_level_count(policy), &em_cb,
+			cpu_data->shared_cpu_map, 0);
+}
+
+static void populate_efficiency_class(void)
 {
 	struct acpi_madt_generic_interrupt *gicc;
 	DECLARE_BITMAP(used_classes, 256) = {};
@@ -503,7 +506,7 @@ static int populate_efficiency_class(void)
 	if (bitmap_weight(used_classes, 256) <= 1) {
 		pr_debug("Efficiency classes are all equal (=%d). "
 			"No EM registered", class);
-		return -EINVAL;
+		return;
 	}
 
 	/*
@@ -520,26 +523,11 @@ static int populate_efficiency_class(void)
 		index++;
 	}
 	cppc_cpufreq_driver.register_em = cppc_cpufreq_register_em;
-
-	return 0;
-}
-
-static void cppc_cpufreq_register_em(struct cpufreq_policy *policy)
-{
-	struct cppc_cpudata *cpu_data;
-	struct em_data_callback em_cb =
-		EM_ADV_DATA_CB(cppc_get_cpu_power, cppc_get_cpu_cost);
-
-	cpu_data = policy->driver_data;
-	em_dev_register_perf_domain(get_cpu_device(policy->cpu),
-			get_perf_level_count(policy), &em_cb,
-			cpu_data->shared_cpu_map, 0);
 }
 
 #else
-static int populate_efficiency_class(void)
+static void populate_efficiency_class(void)
 {
-	return 0;
 }
 #endif
 
@@ -567,8 +555,6 @@ static struct cppc_cpudata *cppc_cpufreq_get_cpu_data(unsigned int cpu)
 		goto free_mask;
 	}
 
-	list_add(&cpu_data->node, &cpu_data_list);
-
 	return cpu_data;
 
 free_mask:
@@ -583,7 +569,6 @@ static void cppc_cpufreq_put_cpu_data(struct cpufreq_policy *policy)
 {
 	struct cppc_cpudata *cpu_data = policy->driver_data;
 
-	list_del(&cpu_data->node);
 	free_cpumask_var(cpu_data->shared_cpu_map);
 	kfree(cpu_data);
 	policy->driver_data = NULL;
@@ -925,7 +910,7 @@ static struct freq_attr *cppc_cpufreq_attr[] = {
 };
 
 static struct cpufreq_driver cppc_cpufreq_driver = {
-	.flags = CPUFREQ_CONST_LOOPS,
+	.flags = CPUFREQ_CONST_LOOPS | CPUFREQ_NEED_UPDATE_LIMITS,
 	.verify = cppc_verify_policy,
 	.target = cppc_cpufreq_set_target,
 	.get = cppc_cpufreq_get_rate,
@@ -954,24 +939,10 @@ static int __init cppc_cpufreq_init(void)
 	return ret;
 }
 
-static inline void free_cpu_data(void)
-{
-	struct cppc_cpudata *iter, *tmp;
-
-	list_for_each_entry_safe(iter, tmp, &cpu_data_list, node) {
-		free_cpumask_var(iter->shared_cpu_map);
-		list_del(&iter->node);
-		kfree(iter);
-	}
-
-}
-
 static void __exit cppc_cpufreq_exit(void)
 {
 	cpufreq_unregister_driver(&cppc_cpufreq_driver);
 	cppc_freq_invariance_exit();
-
-	free_cpu_data();
 }
 
 module_exit(cppc_cpufreq_exit);