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Commit 7cdcec99 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

Merge branches 'pm-cpuidle' and 'pm-cpufreq' 

* pm-cpuidle:
  cpuidle: Check for dev before deregistering it.
  intel_idle: Fixed C6 state on Avoton/Rangeley processors

* pm-cpufreq:
  cpufreq: fix garbage kobjects on errors during suspend/resume
  cpufreq: suspend governors on system suspend/hibernate
parents dc1ccc48 813e8e3d 2167e239

drivers/base/power/main.c

+3 −0
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ 
#include <linux/async.h>

#include <linux/suspend.h>

#include <trace/events/power.h>

#include <linux/cpufreq.h>

#include <linux/cpuidle.h>

#include <linux/timer.h>
@@ -540,6 +541,7 @@ static void dpm_resume_noirq(pm_message_t state) 
	dpm_show_time(starttime, state, "noirq");

	resume_device_irqs();

	cpuidle_resume();

	cpufreq_resume();

}



/**
@@ -955,6 +957,7 @@ static int dpm_suspend_noirq(pm_message_t state) 
	ktime_t starttime = ktime_get();

	int error = 0;



	cpufreq_suspend();

	cpuidle_pause();

	suspend_device_irqs();

	mutex_lock(&dpm_list_mtx);

drivers/cpufreq/cpufreq.c

+43 −3
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include <linux/module.h>

#include <linux/mutex.h>

#include <linux/slab.h>

#include <linux/suspend.h>

#include <linux/syscore_ops.h>

#include <linux/tick.h>

#include <trace/events/power.h>
@@ -47,6 +48,9 @@ static LIST_HEAD(cpufreq_policy_list); 
static DEFINE_PER_CPU(char[CPUFREQ_NAME_LEN], cpufreq_cpu_governor);

#endif



/* Flag to suspend/resume CPUFreq governors */

static bool cpufreq_suspended;



static inline bool has_target(void)

{

	return cpufreq_driver->target_index || cpufreq_driver->target;
@@ -1462,6 +1466,41 @@ static struct subsys_interface cpufreq_interface = { 
	.remove_dev	= cpufreq_remove_dev,

};



void cpufreq_suspend(void)

{

	struct cpufreq_policy *policy;



	if (!has_target())

		return;



	pr_debug("%s: Suspending Governors\n", __func__);



	list_for_each_entry(policy, &cpufreq_policy_list, policy_list)

		if (__cpufreq_governor(policy, CPUFREQ_GOV_STOP))

			pr_err("%s: Failed to stop governor for policy: %p\n",

				__func__, policy);



	cpufreq_suspended = true;

}



void cpufreq_resume(void)

{

	struct cpufreq_policy *policy;



	if (!has_target())

		return;



	pr_debug("%s: Resuming Governors\n", __func__);



	cpufreq_suspended = false;



	list_for_each_entry(policy, &cpufreq_policy_list, policy_list)

		if (__cpufreq_governor(policy, CPUFREQ_GOV_START)

		    || __cpufreq_governor(policy, CPUFREQ_GOV_LIMITS))

			pr_err("%s: Failed to start governor for policy: %p\n",

				__func__, policy);

}



/**

 * cpufreq_bp_suspend - Prepare the boot CPU for system suspend.

 *
@@ -1764,6 +1803,10 @@ static int __cpufreq_governor(struct cpufreq_policy *policy, 
	struct cpufreq_governor *gov = NULL;

#endif



	/* Don't start any governor operations if we are entering suspend */

	if (cpufreq_suspended)

		return 0;



	if (policy->governor->max_transition_latency &&

	    policy->cpuinfo.transition_latency >

	    policy->governor->max_transition_latency) {
@@ -2076,9 +2119,6 @@ static int cpufreq_cpu_callback(struct notifier_block *nfb, 
	dev = get_cpu_device(cpu);

	if (dev) {



		if (action & CPU_TASKS_FROZEN)

			frozen = true;



		switch (action & ~CPU_TASKS_FROZEN) {

		case CPU_ONLINE:

			__cpufreq_add_dev(dev, NULL, frozen);

drivers/cpuidle/cpuidle.c

+1 −1
Original line number Diff line number Diff line
@@ -400,7 +400,7 @@ EXPORT_SYMBOL_GPL(cpuidle_register_device); 
 */

void cpuidle_unregister_device(struct cpuidle_device *dev)

{

	if (dev->registered == 0)

	if (!dev || dev->registered == 0)

		return;



	cpuidle_pause_and_lock();

drivers/idle/intel_idle.c

+2 −2
Original line number Diff line number Diff line
@@ -329,7 +329,7 @@ static struct cpuidle_state atom_cstates[] __initdata = { 
	{

		.enter = NULL }

};

static struct cpuidle_state avn_cstates[CPUIDLE_STATE_MAX] = {

static struct cpuidle_state avn_cstates[] __initdata = {

	{

		.name = "C1-AVN",

		.desc = "MWAIT 0x00",
@@ -340,7 +340,7 @@ static struct cpuidle_state avn_cstates[CPUIDLE_STATE_MAX] = { 
	{

		.name = "C6-AVN",

		.desc = "MWAIT 0x51",

		.flags = MWAIT2flg(0x58) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,

		.flags = MWAIT2flg(0x51) | CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,

		.exit_latency = 15,

		.target_residency = 45,

		.enter = &intel_idle },

include/linux/cpufreq.h

+8 −0
Original line number Diff line number Diff line
@@ -280,6 +280,14 @@ cpufreq_verify_within_cpu_limits(struct cpufreq_policy *policy) 
			policy->cpuinfo.max_freq);

}



#ifdef CONFIG_CPU_FREQ

void cpufreq_suspend(void);

void cpufreq_resume(void);

#else

static inline void cpufreq_suspend(void) {}

static inline void cpufreq_resume(void) {}

#endif



/*********************************************************************

 *                     CPUFREQ NOTIFIER INTERFACE                    *

 *********************************************************************/