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Commit bb1c095f authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

Merge branches 'pm-apm' and 'pm-sleep' 

* pm-apm:
  x86, apm: Remove unused variable

* pm-sleep:
  PM / sleep: Move platform suspend operations to separate functions
  PM / sleep: Simplify sleep states sysfs interface code
parents e5e0243e 42062234 8490fdf9

kernel/power/main.c

+11 −10
Original line number Diff line number Diff line
@@ -296,8 +296,8 @@ static ssize_t state_show(struct kobject *kobj, struct kobj_attribute *attr, 
	suspend_state_t i;



	for (i = PM_SUSPEND_MIN; i < PM_SUSPEND_MAX; i++)

		if (pm_states[i].state)

			s += sprintf(s,"%s ", pm_states[i].label);

		if (pm_states[i])

			s += sprintf(s,"%s ", pm_states[i]);



#endif

	if (hibernation_available())
@@ -311,8 +311,7 @@ static ssize_t state_show(struct kobject *kobj, struct kobj_attribute *attr, 
static suspend_state_t decode_state(const char *buf, size_t n)

{

#ifdef CONFIG_SUSPEND

	suspend_state_t state = PM_SUSPEND_MIN;

	struct pm_sleep_state *s;

	suspend_state_t state;

#endif

	char *p;

	int len;
@@ -325,10 +324,12 @@ static suspend_state_t decode_state(const char *buf, size_t n) 
		return PM_SUSPEND_MAX;



#ifdef CONFIG_SUSPEND

	for (s = &pm_states[state]; state < PM_SUSPEND_MAX; s++, state++)

		if (s->state && len == strlen(s->label)

		    && !strncmp(buf, s->label, len))

			return s->state;

	for (state = PM_SUSPEND_MIN; state < PM_SUSPEND_MAX; state++) {

		const char *label = pm_states[state];



		if (label && len == strlen(label) && !strncmp(buf, label, len))

			return state;

	}

#endif



	return PM_SUSPEND_ON;
@@ -446,8 +447,8 @@ static ssize_t autosleep_show(struct kobject *kobj, 


#ifdef CONFIG_SUSPEND

	if (state < PM_SUSPEND_MAX)

		return sprintf(buf, "%s\n", pm_states[state].state ?

					pm_states[state].label : "error");

		return sprintf(buf, "%s\n", pm_states[state] ?

					pm_states[state] : "error");

#endif

#ifdef CONFIG_HIBERNATION

	return sprintf(buf, "disk\n");

kernel/power/power.h

+1 −6
Original line number Diff line number Diff line
@@ -178,13 +178,8 @@ extern void swsusp_show_speed(struct timeval *, struct timeval *, 
				unsigned int, char *);



#ifdef CONFIG_SUSPEND

struct pm_sleep_state {

	const char *label;

	suspend_state_t state;

};



/* kernel/power/suspend.c */

extern struct pm_sleep_state pm_states[];

extern const char *pm_states[];



extern int suspend_devices_and_enter(suspend_state_t state);

#else /* !CONFIG_SUSPEND */

kernel/power/suspend.c

+90 −62
Original line number Diff line number Diff line
@@ -31,20 +31,11 @@ 


#include "power.h"



struct pm_sleep_state pm_states[PM_SUSPEND_MAX] = {

	[PM_SUSPEND_FREEZE] = { .label = "freeze", .state = PM_SUSPEND_FREEZE },

	[PM_SUSPEND_STANDBY] = { .label = "standby", },

	[PM_SUSPEND_MEM] = { .label = "mem", },

};

static const char *pm_labels[] = { "mem", "standby", "freeze", };

const char *pm_states[PM_SUSPEND_MAX];



static const struct platform_suspend_ops *suspend_ops;

static const struct platform_freeze_ops *freeze_ops;



static bool need_suspend_ops(suspend_state_t state)

{

	return state > PM_SUSPEND_FREEZE;

}



static DECLARE_WAIT_QUEUE_HEAD(suspend_freeze_wait_head);

static bool suspend_freeze_wake;
@@ -97,10 +88,7 @@ static bool relative_states; 
static int __init sleep_states_setup(char *str)

{

	relative_states = !strncmp(str, "1", 1);

	if (relative_states) {

		pm_states[PM_SUSPEND_MEM].state = PM_SUSPEND_FREEZE;

		pm_states[PM_SUSPEND_FREEZE].state = 0;

	}

	pm_states[PM_SUSPEND_FREEZE] = pm_labels[relative_states ? 0 : 2];

	return 1;

}
@@ -113,20 +101,20 @@ __setup("relative_sleep_states=", sleep_states_setup); 
void suspend_set_ops(const struct platform_suspend_ops *ops)

{

	suspend_state_t i;

	int j = PM_SUSPEND_MAX - 1;

	int j = 0;



	lock_system_sleep();



	suspend_ops = ops;

	for (i = PM_SUSPEND_MEM; i >= PM_SUSPEND_STANDBY; i--)

		if (valid_state(i))

			pm_states[j--].state = i;

		else if (!relative_states)

			pm_states[j--].state = 0;

		if (valid_state(i)) {

			pm_states[i] = pm_labels[j++];

		} else if (!relative_states) {

			pm_states[i] = NULL;

			j++;

		}



	pm_states[j--].state = PM_SUSPEND_FREEZE;

	while (j >= PM_SUSPEND_MIN)

		pm_states[j--].state = 0;

	pm_states[PM_SUSPEND_FREEZE] = pm_labels[j];



	unlock_system_sleep();

}
@@ -145,6 +133,65 @@ int suspend_valid_only_mem(suspend_state_t state) 
}

EXPORT_SYMBOL_GPL(suspend_valid_only_mem);



static bool sleep_state_supported(suspend_state_t state)

{

	return state == PM_SUSPEND_FREEZE || (suspend_ops && suspend_ops->enter);

}



static int platform_suspend_prepare(suspend_state_t state)

{

	return state != PM_SUSPEND_FREEZE && suspend_ops->prepare ?

		suspend_ops->prepare() : 0;

}



static int platform_suspend_prepare_late(suspend_state_t state)

{

	return state != PM_SUSPEND_FREEZE && suspend_ops->prepare_late ?

		suspend_ops->prepare_late() : 0;

}



static void platform_suspend_wake(suspend_state_t state)

{

	if (state != PM_SUSPEND_FREEZE && suspend_ops->wake)

		suspend_ops->wake();

}



static void platform_suspend_finish(suspend_state_t state)

{

	if (state != PM_SUSPEND_FREEZE && suspend_ops->finish)

		suspend_ops->finish();

}



static int platform_suspend_begin(suspend_state_t state)

{

	if (state == PM_SUSPEND_FREEZE && freeze_ops && freeze_ops->begin)

		return freeze_ops->begin();

	else if (suspend_ops->begin)

		return suspend_ops->begin(state);

	else

		return 0;

}



static void platform_suspend_end(suspend_state_t state)

{

	if (state == PM_SUSPEND_FREEZE && freeze_ops && freeze_ops->end)

		freeze_ops->end();

	else if (suspend_ops->end)

		suspend_ops->end();

}



static void platform_suspend_recover(suspend_state_t state)

{

	if (state != PM_SUSPEND_FREEZE && suspend_ops->recover)

		suspend_ops->recover();

}



static bool platform_suspend_again(suspend_state_t state)

{

	return state != PM_SUSPEND_FREEZE && suspend_ops->suspend_again ?

		suspend_ops->suspend_again() : false;

}



static int suspend_test(int level)

{

#ifdef CONFIG_PM_DEBUG
@@ -168,7 +215,7 @@ static int suspend_prepare(suspend_state_t state) 
{

	int error;



	if (need_suspend_ops(state) && (!suspend_ops || !suspend_ops->enter))

	if (!sleep_state_supported(state))

		return -EPERM;



	pm_prepare_console();
@@ -214,23 +261,18 @@ static int suspend_enter(suspend_state_t state, bool *wakeup) 
{

	int error;



	if (need_suspend_ops(state) && suspend_ops->prepare) {

		error = suspend_ops->prepare();

	error = platform_suspend_prepare(state);

	if (error)

		goto Platform_finish;

	}



	error = dpm_suspend_end(PMSG_SUSPEND);

	if (error) {

		printk(KERN_ERR "PM: Some devices failed to power down\n");

		goto Platform_finish;

	}



	if (need_suspend_ops(state) && suspend_ops->prepare_late) {

		error = suspend_ops->prepare_late();

	error = platform_suspend_prepare_late(state);

	if (error)

		goto Platform_wake;

	}



	if (suspend_test(TEST_PLATFORM))

		goto Platform_wake;
@@ -278,15 +320,11 @@ static int suspend_enter(suspend_state_t state, bool *wakeup) 
	ftrace_start();



 Platform_wake:

	if (need_suspend_ops(state) && suspend_ops->wake)

		suspend_ops->wake();



	platform_suspend_wake(state);

	dpm_resume_start(PMSG_RESUME);



 Platform_finish:

	if (need_suspend_ops(state) && suspend_ops->finish)

		suspend_ops->finish();



	platform_suspend_finish(state);

	return error;

}
@@ -299,18 +337,13 @@ int suspend_devices_and_enter(suspend_state_t state) 
	int error;

	bool wakeup = false;



	if (need_suspend_ops(state) && !suspend_ops)

	if (!sleep_state_supported(state))

		return -ENOSYS;



	if (need_suspend_ops(state) && suspend_ops->begin) {

		error = suspend_ops->begin(state);

	error = platform_suspend_begin(state);

	if (error)

		goto Close;

	} else if (state == PM_SUSPEND_FREEZE && freeze_ops && freeze_ops->begin) {

		error = freeze_ops->begin();

		if (error)

			goto Close;

	}



	suspend_console();

	suspend_test_start();

	error = dpm_suspend_start(PMSG_SUSPEND);
@@ -324,25 +357,20 @@ int suspend_devices_and_enter(suspend_state_t state) 


	do {

		error = suspend_enter(state, &wakeup);

	} while (!error && !wakeup && need_suspend_ops(state)

		&& suspend_ops->suspend_again && suspend_ops->suspend_again());

	} while (!error && !wakeup && platform_suspend_again(state));



 Resume_devices:

	suspend_test_start();

	dpm_resume_end(PMSG_RESUME);

	suspend_test_finish("resume devices");

	resume_console();

 Close:

	if (need_suspend_ops(state) && suspend_ops->end)

		suspend_ops->end();

	else if (state == PM_SUSPEND_FREEZE && freeze_ops && freeze_ops->end)

		freeze_ops->end();



 Close:

	platform_suspend_end(state);

	return error;



 Recover_platform:

	if (need_suspend_ops(state) && suspend_ops->recover)

		suspend_ops->recover();

	platform_suspend_recover(state);

	goto Resume_devices;

}
@@ -395,7 +423,7 @@ static int enter_state(suspend_state_t state) 
	printk("done.\n");

	trace_suspend_resume(TPS("sync_filesystems"), 0, false);



	pr_debug("PM: Preparing system for %s sleep\n", pm_states[state].label);

	pr_debug("PM: Preparing system for %s sleep\n", pm_states[state]);

	error = suspend_prepare(state);

	if (error)

		goto Unlock;
@@ -404,7 +432,7 @@ static int enter_state(suspend_state_t state) 
		goto Finish;



	trace_suspend_resume(TPS("suspend_enter"), state, false);

	pr_debug("PM: Entering %s sleep\n", pm_states[state].label);

	pr_debug("PM: Entering %s sleep\n", pm_states[state]);

	pm_restrict_gfp_mask();

	error = suspend_devices_and_enter(state);

	pm_restore_gfp_mask();

kernel/power/suspend_test.c

+6 −6
Original line number Diff line number Diff line
@@ -92,13 +92,13 @@ static void __init test_wakealarm(struct rtc_device *rtc, suspend_state_t state) 
	}



	if (state == PM_SUSPEND_MEM) {

		printk(info_test, pm_states[state].label);

		printk(info_test, pm_states[state]);

		status = pm_suspend(state);

		if (status == -ENODEV)

			state = PM_SUSPEND_STANDBY;

	}

	if (state == PM_SUSPEND_STANDBY) {

		printk(info_test, pm_states[state].label);

		printk(info_test, pm_states[state]);

		status = pm_suspend(state);

	}

	if (status < 0)
@@ -141,8 +141,8 @@ static int __init setup_test_suspend(char *value) 
	/* "=mem" ==> "mem" */

	value++;

	for (i = PM_SUSPEND_MIN; i < PM_SUSPEND_MAX; i++)

		if (!strcmp(pm_states[i].label, value)) {

			test_state = pm_states[i].state;

		if (!strcmp(pm_states[i], value)) {

			test_state = i;

			return 0;

		}
@@ -162,8 +162,8 @@ static int __init test_suspend(void) 
	/* PM is initialized by now; is that state testable? */

	if (test_state == PM_SUSPEND_ON)

		goto done;

	if (!pm_states[test_state].state) {

		printk(warn_bad_state, pm_states[test_state].label);

	if (!pm_states[test_state]) {

		printk(warn_bad_state, pm_states[test_state]);

		goto done;

	}