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Commit 12205a4b authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

Revert "cpufreq: suspend governors on system suspend/hibernate" 



Commit 5a87182a (cpufreq: suspend governors on system
suspend/hibernate) causes hibernation problems to happen on
Bjørn Mork's and Paul Bolle's systems, so revert it.

Fixes: 5a87182a (cpufreq: suspend governors on system suspend/hibernate)
Reported-by: default avatarBjørn Mork <bjorn@mork.no>
Reported-by: default avatarPaul Bolle <pebolle@tiscali.nl>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 374b1057

drivers/base/power/main.c

+0 −3
Original line number Diff line number Diff line
@@ -29,7 +29,6 @@ 
#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>
@@ -541,7 +540,6 @@ static void dpm_resume_noirq(pm_message_t state) 
	dpm_show_time(starttime, state, "noirq");

	resume_device_irqs();

	cpuidle_resume();

	cpufreq_resume();

}



/**
@@ -957,7 +955,6 @@ 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

+0 −43
Original line number Diff line number Diff line
@@ -26,7 +26,6 @@ 
#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>
@@ -48,9 +47,6 @@ 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;
@@ -1466,41 +1462,6 @@ 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.

 *
@@ -1803,10 +1764,6 @@ 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) {

include/linux/cpufreq.h

+0 −8
Original line number Diff line number Diff line
@@ -280,14 +280,6 @@ 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                    *

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