Merge branches 'pm-cpufreq' and 'pm-runtime'

Merge cpufreq and runtime PM updates for 7.0-rc2:

 - Fix two issues in the intel_pstate driver causing it to crash when
   its sysfs interface is used on a system with some offline CPUs (David
   Arcari, Srinivas Pandruvada)

 - Update the last user of the pm_runtime_put() return value to discard
   it and turn pm_runtime_put() into a void function (Rafael Wysocki)

* pm-cpufreq:
  cpufreq: intel_pstate: Fix crash during turbo disable
  cpufreq: intel_pstate: Fix NULL pointer dereference in update_cpu_qos_request()

* pm-runtime:
  PM: runtime: Change pm_runtime_put() return type to void
  pmdomain: imx: gpcv2: Discard pm_runtime_put() return value

Author: rafaeljw

drivers/cpufreq/intel_pstate.c

@@ -1476,13 +1476,13 @@ static void __intel_pstate_update_max_freq(struct cpufreq_policy *policy,
 	refresh_frequency_limits(policy);
 }
 
-static bool intel_pstate_update_max_freq(struct cpudata *cpudata)
+static bool intel_pstate_update_max_freq(int cpu)
 {
-	struct cpufreq_policy *policy __free(put_cpufreq_policy) = cpufreq_cpu_get(cpudata->cpu);
+	struct cpufreq_policy *policy __free(put_cpufreq_policy) = cpufreq_cpu_get(cpu);
 	if (!policy)
 		return false;
 
-	__intel_pstate_update_max_freq(policy, cpudata);
+	__intel_pstate_update_max_freq(policy, all_cpu_data[cpu]);
 
 	return true;
 }
@@ -1501,7 +1501,7 @@ static void intel_pstate_update_limits_for_all(void)
 	int cpu;
 
 	for_each_possible_cpu(cpu)
-		intel_pstate_update_max_freq(all_cpu_data[cpu]);
+		intel_pstate_update_max_freq(cpu);
 
 	mutex_lock(&hybrid_capacity_lock);
 
@@ -1647,8 +1647,8 @@ static ssize_t store_no_turbo(struct kobject *a, struct kobj_attribute *b,
 static void update_cpu_qos_request(int cpu, enum freq_qos_req_type type)
 {
 	struct cpudata *cpudata = all_cpu_data[cpu];
-	unsigned int freq = cpudata->pstate.turbo_freq;
 	struct freq_qos_request *req;
+	unsigned int freq;
 
 	struct cpufreq_policy *policy __free(put_cpufreq_policy) = cpufreq_cpu_get(cpu);
 	if (!policy)
@@ -1661,6 +1661,8 @@ static void update_cpu_qos_request(int cpu, enum freq_qos_req_type type)
 	if (hwp_active)
 		intel_pstate_get_hwp_cap(cpudata);
 
+	freq = cpudata->pstate.turbo_freq;
+
 	if (type == FREQ_QOS_MIN) {
 		freq = DIV_ROUND_UP(freq * global.min_perf_pct, 100);
 	} else {
@@ -1908,7 +1910,7 @@ static void intel_pstate_notify_work(struct work_struct *work)
 	struct cpudata *cpudata =
 		container_of(to_delayed_work(work), struct cpudata, hwp_notify_work);
 
-	if (intel_pstate_update_max_freq(cpudata)) {
+	if (intel_pstate_update_max_freq(cpudata->cpu)) {
 		/*
 		 * The driver will not be unregistered while this function is
 		 * running, so update the capacity without acquiring the driver

drivers/pmdomain/imx/gpcv2.c

@@ -1416,7 +1416,9 @@ static int imx_pgc_domain_suspend(struct device *dev)
 
 static int imx_pgc_domain_resume(struct device *dev)
 {
-	return pm_runtime_put(dev);
+	pm_runtime_put(dev);
+
+	return 0;
 }
 #endif
 

include/linux/pm_runtime.h

@@ -545,22 +545,10 @@ static inline int pm_runtime_resume_and_get(struct device *dev)
  *
  * Decrement the runtime PM usage counter of @dev and if it turns out to be
  * equal to 0, queue up a work item for @dev like in pm_request_idle().
- *
- * Return:
- * * 1: Success. Usage counter dropped to zero, but device was already suspended.
- * * 0: Success.
- * * -EINVAL: Runtime PM error.
- * * -EACCES: Runtime PM disabled.
- * * -EAGAIN: Runtime PM usage counter became non-zero or Runtime PM status
- *            change ongoing.
- * * -EBUSY: Runtime PM child_count non-zero.
- * * -EPERM: Device PM QoS resume latency 0.
- * * -EINPROGRESS: Suspend already in progress.
- * * -ENOSYS: CONFIG_PM not enabled.
  */
-static inline int pm_runtime_put(struct device *dev)
+static inline void pm_runtime_put(struct device *dev)
 {
-	return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
+	__pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC);
 }
 
 /**