Merge tag 'pm-5.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fix from Rafael Wysocki:
 "Fix a recently introduced (mostly theoretical) issue that the requests
  to confine the maximum CPU frequency coming from the platform firmware
  may not be taken into account if multiple CPUs are covered by one
  cpufreq policy on a system with ACPI"

* tag 'pm-5.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: processor: Add QoS requests for all CPUs

2 files changed, 42 insertions, 26 deletions

diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index 753e171de006..5909e8fa4013 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -159,26 +159,34 @@ void acpi_processor_ignore_ppc_init(void)
 
 void acpi_processor_ppc_init(struct cpufreq_policy *policy)
 {
-	int cpu = policy->cpu;
-	struct acpi_processor *pr = per_cpu(processors, cpu);
-	int ret;
+	unsigned int cpu;
 
-	if (!pr)
-		return;
+	for_each_cpu(cpu, policy->related_cpus) {
+		struct acpi_processor *pr = per_cpu(processors, cpu);
+		int ret;
+
+		if (!pr)
+			continue;
 
-	ret = freq_qos_add_request(&policy->constraints, &pr->perflib_req,
-				   FREQ_QOS_MAX, INT_MAX);
-	if (ret < 0)
-		pr_err("Failed to add freq constraint for CPU%d (%d)\n", cpu,
-		       ret);
+		ret = freq_qos_add_request(&policy->constraints,
+					   &pr->perflib_req,
+					   FREQ_QOS_MAX, INT_MAX);
+		if (ret < 0)
+			pr_err("Failed to add freq constraint for CPU%d (%d)\n",
+			       cpu, ret);
+	}
 }
 
 void acpi_processor_ppc_exit(struct cpufreq_policy *policy)
 {
-	struct acpi_processor *pr = per_cpu(processors, policy->cpu);
+	unsigned int cpu;
 
-	if (pr)
-		freq_qos_remove_request(&pr->perflib_req);
+	for_each_cpu(cpu, policy->related_cpus) {
+		struct acpi_processor *pr = per_cpu(processors, cpu);
+
+		if (pr)
+			freq_qos_remove_request(&pr->perflib_req);
+	}
 }
 
 static int acpi_processor_get_performance_control(struct acpi_processor *pr)
diff --git a/drivers/acpi/processor_thermal.c b/drivers/acpi/processor_thermal.c
index c77a5b1fb107..41feb88ee92d 100644
--- a/drivers/acpi/processor_thermal.c
+++ b/drivers/acpi/processor_thermal.c
@@ -127,26 +127,34 @@ static int cpufreq_set_cur_state(unsigned int cpu, int state)
 
 void acpi_thermal_cpufreq_init(struct cpufreq_policy *policy)
 {
-	int cpu = policy->cpu;
-	struct acpi_processor *pr = per_cpu(processors, cpu);
-	int ret;
+	unsigned int cpu;
 
-	if (!pr)
-		return;
+	for_each_cpu(cpu, policy->related_cpus) {
+		struct acpi_processor *pr = per_cpu(processors, cpu);
+		int ret;
+
+		if (!pr)
+			continue;
 
-	ret = freq_qos_add_request(&policy->constraints, &pr->thermal_req,
-				   FREQ_QOS_MAX, INT_MAX);
-	if (ret < 0)
-		pr_err("Failed to add freq constraint for CPU%d (%d)\n", cpu,
-		       ret);
+		ret = freq_qos_add_request(&policy->constraints,
+					   &pr->thermal_req,
+					   FREQ_QOS_MAX, INT_MAX);
+		if (ret < 0)
+			pr_err("Failed to add freq constraint for CPU%d (%d)\n",
+			       cpu, ret);
+	}
 }
 
 void acpi_thermal_cpufreq_exit(struct cpufreq_policy *policy)
 {
-	struct acpi_processor *pr = per_cpu(processors, policy->cpu);
+	unsigned int cpu;
+
+	for_each_cpu(cpu, policy->related_cpus) {
+		struct acpi_processor *pr = per_cpu(processors, policy->cpu);
 
-	if (pr)
-		freq_qos_remove_request(&pr->thermal_req);
+		if (pr)
+			freq_qos_remove_request(&pr->thermal_req);
+	}
 }
 #else				/* ! CONFIG_CPU_FREQ */
 static int cpufreq_get_max_state(unsigned int cpu)