summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--Documentation/power/runtime_pm.txt6
-rw-r--r--arch/arm/mach-omap2/omap_device.c7
-rw-r--r--drivers/base/power/main.c11
-rw-r--r--drivers/base/power/runtime.c1
-rw-r--r--drivers/base/power/wakeup.c54
-rw-r--r--drivers/bus/omap_l3_noc.c4
-rw-r--r--drivers/cpuidle/cpuidle.c2
-rw-r--r--drivers/leds/led-class.c7
-rw-r--r--include/linux/cpuidle.h16
-rw-r--r--include/linux/pm.h12
-rw-r--r--include/linux/tick.h12
-rw-r--r--kernel/power/main.c2
-rw-r--r--kernel/power/suspend.c8
-rw-r--r--kernel/time/tick-common.c17
14 files changed, 124 insertions, 35 deletions
diff --git a/Documentation/power/runtime_pm.txt b/Documentation/power/runtime_pm.txt
index 44fe1d28a163..e76dc0ad4d2b 100644
--- a/Documentation/power/runtime_pm.txt
+++ b/Documentation/power/runtime_pm.txt
@@ -556,6 +556,12 @@ helper functions described in Section 4. In that case, pm_runtime_resume()
should be used. Of course, for this purpose the device's runtime PM has to be
enabled earlier by calling pm_runtime_enable().
+Note, if the device may execute pm_runtime calls during the probe (such as
+if it is registers with a subsystem that may call back in) then the
+pm_runtime_get_sync() call paired with a pm_runtime_put() call will be
+appropriate to ensure that the device is not put back to sleep during the
+probe. This can happen with systems such as the network device layer.
+
It may be desirable to suspend the device once ->probe() has finished.
Therefore the driver core uses the asyncronous pm_request_idle() to submit a
request to execute the subsystem-level idle callback for the device at that
diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c
index 166b18f515a2..83a0f5ab85c2 100644
--- a/arch/arm/mach-omap2/omap_device.c
+++ b/arch/arm/mach-omap2/omap_device.c
@@ -688,11 +688,8 @@ struct dev_pm_domain omap_device_pm_domain = {
SET_RUNTIME_PM_OPS(_od_runtime_suspend, _od_runtime_resume,
NULL)
USE_PLATFORM_PM_SLEEP_OPS
- .suspend_noirq = _od_suspend_noirq,
- .resume_noirq = _od_resume_noirq,
- .freeze_noirq = _od_suspend_noirq,
- .thaw_noirq = _od_resume_noirq,
- .restore_noirq = _od_resume_noirq,
+ SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(_od_suspend_noirq,
+ _od_resume_noirq)
}
};
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 3d874eca7104..5528e59ae788 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -920,9 +920,7 @@ static void device_complete(struct device *dev, pm_message_t state)
if (callback) {
pm_dev_dbg(dev, state, info);
- trace_device_pm_callback_start(dev, info, state.event);
callback(dev);
- trace_device_pm_callback_end(dev, 0);
}
device_unlock(dev);
@@ -954,7 +952,9 @@ void dpm_complete(pm_message_t state)
list_move(&dev->power.entry, &list);
mutex_unlock(&dpm_list_mtx);
+ trace_device_pm_callback_start(dev, "", state.event);
device_complete(dev, state);
+ trace_device_pm_callback_end(dev, 0);
mutex_lock(&dpm_list_mtx);
put_device(dev);
@@ -1585,11 +1585,8 @@ static int device_prepare(struct device *dev, pm_message_t state)
callback = dev->driver->pm->prepare;
}
- if (callback) {
- trace_device_pm_callback_start(dev, info, state.event);
+ if (callback)
ret = callback(dev);
- trace_device_pm_callback_end(dev, ret);
- }
device_unlock(dev);
@@ -1631,7 +1628,9 @@ int dpm_prepare(pm_message_t state)
get_device(dev);
mutex_unlock(&dpm_list_mtx);
+ trace_device_pm_callback_start(dev, "", state.event);
error = device_prepare(dev, state);
+ trace_device_pm_callback_end(dev, error);
mutex_lock(&dpm_list_mtx);
if (error) {
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 5070c4fe8542..4ffe4a2add76 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -741,6 +741,7 @@ static int rpm_resume(struct device *dev, int rpmflags)
} else {
no_callback:
__update_runtime_status(dev, RPM_ACTIVE);
+ pm_runtime_mark_last_busy(dev);
if (parent)
atomic_inc(&parent->power.child_count);
}
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index 77262009f89d..87c2603b9327 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -56,6 +56,11 @@ static LIST_HEAD(wakeup_sources);
static DECLARE_WAIT_QUEUE_HEAD(wakeup_count_wait_queue);
+static struct wakeup_source deleted_ws = {
+ .name = "deleted",
+ .lock = __SPIN_LOCK_UNLOCKED(deleted_ws.lock),
+};
+
/**
* wakeup_source_prepare - Prepare a new wakeup source for initialization.
* @ws: Wakeup source to prepare.
@@ -107,6 +112,34 @@ void wakeup_source_drop(struct wakeup_source *ws)
}
EXPORT_SYMBOL_GPL(wakeup_source_drop);
+/*
+ * Record wakeup_source statistics being deleted into a dummy wakeup_source.
+ */
+static void wakeup_source_record(struct wakeup_source *ws)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&deleted_ws.lock, flags);
+
+ if (ws->event_count) {
+ deleted_ws.total_time =
+ ktime_add(deleted_ws.total_time, ws->total_time);
+ deleted_ws.prevent_sleep_time =
+ ktime_add(deleted_ws.prevent_sleep_time,
+ ws->prevent_sleep_time);
+ deleted_ws.max_time =
+ ktime_compare(deleted_ws.max_time, ws->max_time) > 0 ?
+ deleted_ws.max_time : ws->max_time;
+ deleted_ws.event_count += ws->event_count;
+ deleted_ws.active_count += ws->active_count;
+ deleted_ws.relax_count += ws->relax_count;
+ deleted_ws.expire_count += ws->expire_count;
+ deleted_ws.wakeup_count += ws->wakeup_count;
+ }
+
+ spin_unlock_irqrestore(&deleted_ws.lock, flags);
+}
+
/**
* wakeup_source_destroy - Destroy a struct wakeup_source object.
* @ws: Wakeup source to destroy.
@@ -119,6 +152,7 @@ void wakeup_source_destroy(struct wakeup_source *ws)
return;
wakeup_source_drop(ws);
+ wakeup_source_record(ws);
kfree(ws->name);
kfree(ws);
}
@@ -351,6 +385,20 @@ int device_set_wakeup_enable(struct device *dev, bool enable)
}
EXPORT_SYMBOL_GPL(device_set_wakeup_enable);
+/**
+ * wakeup_source_not_registered - validate the given wakeup source.
+ * @ws: Wakeup source to be validated.
+ */
+static bool wakeup_source_not_registered(struct wakeup_source *ws)
+{
+ /*
+ * Use timer struct to check if the given source is initialized
+ * by wakeup_source_add.
+ */
+ return ws->timer.function != pm_wakeup_timer_fn ||
+ ws->timer.data != (unsigned long)ws;
+}
+
/*
* The functions below use the observation that each wakeup event starts a
* period in which the system should not be suspended. The moment this period
@@ -391,6 +439,10 @@ static void wakeup_source_activate(struct wakeup_source *ws)
{
unsigned int cec;
+ if (WARN_ONCE(wakeup_source_not_registered(ws),
+ "unregistered wakeup source\n"))
+ return;
+
/*
* active wakeup source should bring the system
* out of PM_SUSPEND_FREEZE state
@@ -894,6 +946,8 @@ static int wakeup_sources_stats_show(struct seq_file *m, void *unused)
print_wakeup_source_stats(m, ws);
rcu_read_unlock();
+ print_wakeup_source_stats(m, &deleted_ws);
+
return 0;
}
diff --git a/drivers/bus/omap_l3_noc.c b/drivers/bus/omap_l3_noc.c
index ebee57d715d2..5012e3ad1225 100644
--- a/drivers/bus/omap_l3_noc.c
+++ b/drivers/bus/omap_l3_noc.c
@@ -301,7 +301,7 @@ static int omap_l3_probe(struct platform_device *pdev)
return ret;
}
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
/**
* l3_resume_noirq() - resume function for l3_noc
@@ -347,7 +347,7 @@ static int l3_resume_noirq(struct device *dev)
}
static const struct dev_pm_ops l3_dev_pm_ops = {
- .resume_noirq = l3_resume_noirq,
+ SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(NULL, l3_resume_noirq)
};
#define L3_DEV_PM_OPS (&l3_dev_pm_ops)
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 7f1b8f507a56..e8e2775c3821 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -97,6 +97,7 @@ static int find_deepest_state(struct cpuidle_driver *drv,
return ret;
}
+#ifdef CONFIG_SUSPEND
/**
* cpuidle_find_deepest_state - Find the deepest available idle state.
* @drv: cpuidle driver for the given CPU.
@@ -150,6 +151,7 @@ int cpuidle_enter_freeze(struct cpuidle_driver *drv, struct cpuidle_device *dev)
return index;
}
+#endif /* CONFIG_SUSPEND */
/**
* cpuidle_enter_state - enter the state and update stats
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index 728681debdbe..7fb2a19ac649 100644
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -187,6 +187,7 @@ void led_classdev_resume(struct led_classdev *led_cdev)
}
EXPORT_SYMBOL_GPL(led_classdev_resume);
+#ifdef CONFIG_PM_SLEEP
static int led_suspend(struct device *dev)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
@@ -206,11 +207,9 @@ static int led_resume(struct device *dev)
return 0;
}
+#endif
-static const struct dev_pm_ops leds_class_dev_pm_ops = {
- .suspend = led_suspend,
- .resume = led_resume,
-};
+static SIMPLE_DEV_PM_OPS(leds_class_dev_pm_ops, led_suspend, led_resume);
static int match_name(struct device *dev, const void *data)
{
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index c7a63643658e..d075d34279df 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -151,10 +151,6 @@ extern void cpuidle_resume(void);
extern int cpuidle_enable_device(struct cpuidle_device *dev);
extern void cpuidle_disable_device(struct cpuidle_device *dev);
extern int cpuidle_play_dead(void);
-extern int cpuidle_find_deepest_state(struct cpuidle_driver *drv,
- struct cpuidle_device *dev);
-extern int cpuidle_enter_freeze(struct cpuidle_driver *drv,
- struct cpuidle_device *dev);
extern struct cpuidle_driver *cpuidle_get_cpu_driver(struct cpuidle_device *dev);
#else
@@ -190,14 +186,22 @@ static inline int cpuidle_enable_device(struct cpuidle_device *dev)
{return -ENODEV; }
static inline void cpuidle_disable_device(struct cpuidle_device *dev) { }
static inline int cpuidle_play_dead(void) {return -ENODEV; }
+static inline struct cpuidle_driver *cpuidle_get_cpu_driver(
+ struct cpuidle_device *dev) {return NULL; }
+#endif
+
+#if defined(CONFIG_CPU_IDLE) && defined(CONFIG_SUSPEND)
+extern int cpuidle_find_deepest_state(struct cpuidle_driver *drv,
+ struct cpuidle_device *dev);
+extern int cpuidle_enter_freeze(struct cpuidle_driver *drv,
+ struct cpuidle_device *dev);
+#else
static inline int cpuidle_find_deepest_state(struct cpuidle_driver *drv,
struct cpuidle_device *dev)
{return -ENODEV; }
static inline int cpuidle_enter_freeze(struct cpuidle_driver *drv,
struct cpuidle_device *dev)
{return -ENODEV; }
-static inline struct cpuidle_driver *cpuidle_get_cpu_driver(
- struct cpuidle_device *dev) {return NULL; }
#endif
/* kernel/sched/idle.c */
diff --git a/include/linux/pm.h b/include/linux/pm.h
index 2d29c64f8fb1..4890743892ef 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -342,6 +342,18 @@ struct dev_pm_ops {
#define SET_LATE_SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn)
#endif
+#ifdef CONFIG_PM_SLEEP
+#define SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn) \
+ .suspend_noirq = suspend_fn, \
+ .resume_noirq = resume_fn, \
+ .freeze_noirq = suspend_fn, \
+ .thaw_noirq = resume_fn, \
+ .poweroff_noirq = suspend_fn, \
+ .restore_noirq = resume_fn,
+#else
+#define SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn)
+#endif
+
#ifdef CONFIG_PM
#define SET_RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
.runtime_suspend = suspend_fn, \
diff --git a/include/linux/tick.h b/include/linux/tick.h
index f8492da57ad3..ec6e8bc992bf 100644
--- a/include/linux/tick.h
+++ b/include/linux/tick.h
@@ -13,8 +13,6 @@
#ifdef CONFIG_GENERIC_CLOCKEVENTS
extern void __init tick_init(void);
-extern void tick_freeze(void);
-extern void tick_unfreeze(void);
/* Should be core only, but ARM BL switcher requires it */
extern void tick_suspend_local(void);
/* Should be core only, but XEN resume magic and ARM BL switcher require it */
@@ -23,14 +21,20 @@ extern void tick_handover_do_timer(void);
extern void tick_cleanup_dead_cpu(int cpu);
#else /* CONFIG_GENERIC_CLOCKEVENTS */
static inline void tick_init(void) { }
-static inline void tick_freeze(void) { }
-static inline void tick_unfreeze(void) { }
static inline void tick_suspend_local(void) { }
static inline void tick_resume_local(void) { }
static inline void tick_handover_do_timer(void) { }
static inline void tick_cleanup_dead_cpu(int cpu) { }
#endif /* !CONFIG_GENERIC_CLOCKEVENTS */
+#if defined(CONFIG_GENERIC_CLOCKEVENTS) && defined(CONFIG_SUSPEND)
+extern void tick_freeze(void);
+extern void tick_unfreeze(void);
+#else
+static inline void tick_freeze(void) { }
+static inline void tick_unfreeze(void) { }
+#endif
+
#ifdef CONFIG_TICK_ONESHOT
extern void tick_irq_enter(void);
# ifndef arch_needs_cpu
diff --git a/kernel/power/main.c b/kernel/power/main.c
index 86e8157a450f..63d395b5df93 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -272,7 +272,7 @@ static inline void pm_print_times_init(void)
{
pm_print_times_enabled = !!initcall_debug;
}
-#else /* !CONFIG_PP_SLEEP_DEBUG */
+#else /* !CONFIG_PM_SLEEP_DEBUG */
static inline void pm_print_times_init(void) {}
#endif /* CONFIG_PM_SLEEP_DEBUG */
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 8d7a1ef72758..53266b729fd9 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -366,6 +366,8 @@ static int suspend_enter(suspend_state_t state, bool *wakeup)
trace_suspend_resume(TPS("machine_suspend"),
state, false);
events_check_enabled = false;
+ } else if (*wakeup) {
+ error = -EBUSY;
}
syscore_resume();
}
@@ -468,7 +470,7 @@ static int enter_state(suspend_state_t state)
if (state == PM_SUSPEND_FREEZE) {
#ifdef CONFIG_PM_DEBUG
if (pm_test_level != TEST_NONE && pm_test_level <= TEST_CPUS) {
- pr_warning("PM: Unsupported test mode for freeze state,"
+ pr_warning("PM: Unsupported test mode for suspend to idle,"
"please choose none/freezer/devices/platform.\n");
return -EAGAIN;
}
@@ -488,7 +490,7 @@ 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]);
+ pr_debug("PM: Preparing system for sleep (%s)\n", pm_states[state]);
error = suspend_prepare(state);
if (error)
goto Unlock;
@@ -497,7 +499,7 @@ 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]);
+ pr_debug("PM: Suspending system (%s)\n", pm_states[state]);
pm_restrict_gfp_mask();
error = suspend_devices_and_enter(state);
pm_restore_gfp_mask();
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index 3ae6afa1eb98..51508465153c 100644
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -19,6 +19,7 @@
#include <linux/profile.h>
#include <linux/sched.h>
#include <linux/module.h>
+#include <trace/events/power.h>
#include <asm/irq_regs.h>
@@ -440,6 +441,7 @@ void tick_resume(void)
tick_resume_local();
}
+#ifdef CONFIG_SUSPEND
static DEFINE_RAW_SPINLOCK(tick_freeze_lock);
static unsigned int tick_freeze_depth;
@@ -457,10 +459,13 @@ void tick_freeze(void)
raw_spin_lock(&tick_freeze_lock);
tick_freeze_depth++;
- if (tick_freeze_depth == num_online_cpus())
+ if (tick_freeze_depth == num_online_cpus()) {
+ trace_suspend_resume(TPS("timekeeping_freeze"),
+ smp_processor_id(), true);
timekeeping_suspend();
- else
+ } else {
tick_suspend_local();
+ }
raw_spin_unlock(&tick_freeze_lock);
}
@@ -478,15 +483,19 @@ void tick_unfreeze(void)
{
raw_spin_lock(&tick_freeze_lock);
- if (tick_freeze_depth == num_online_cpus())
+ if (tick_freeze_depth == num_online_cpus()) {
timekeeping_resume();
- else
+ trace_suspend_resume(TPS("timekeeping_freeze"),
+ smp_processor_id(), false);
+ } else {
tick_resume_local();
+ }
tick_freeze_depth--;
raw_spin_unlock(&tick_freeze_lock);
}
+#endif /* CONFIG_SUSPEND */
/**
* tick_init - initialize the tick control
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-28 03:11:04 +0000