diff options
Diffstat (limited to 'drivers/base')
-rw-r--r-- | drivers/base/memory.c | 1 | ||||
-rw-r--r-- | drivers/base/power/domain.c | 402 | ||||
-rw-r--r-- | drivers/base/power/opp.c | 17 | ||||
-rw-r--r-- | drivers/base/power/trace.c | 2 | ||||
-rw-r--r-- | drivers/base/syscore.c | 8 |
5 files changed, 347 insertions, 83 deletions
diff --git a/drivers/base/memory.c b/drivers/base/memory.c index 9f9b235..45d7c8f 100644 --- a/drivers/base/memory.c +++ b/drivers/base/memory.c @@ -30,7 +30,6 @@ static DEFINE_MUTEX(mem_sysfs_mutex); #define MEMORY_CLASS_NAME "memory" -#define MIN_MEMORY_BLOCK_SIZE (1 << SECTION_SIZE_BITS) static int sections_per_block; diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 1aed94c..be8714a 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -13,6 +13,11 @@ #include <linux/pm_domain.h> #include <linux/slab.h> #include <linux/err.h> +#include <linux/sched.h> +#include <linux/suspend.h> + +static LIST_HEAD(gpd_list); +static DEFINE_MUTEX(gpd_list_lock); #ifdef CONFIG_PM @@ -30,6 +35,41 @@ static void genpd_sd_counter_dec(struct generic_pm_domain *genpd) genpd->sd_count--; } +static void genpd_acquire_lock(struct generic_pm_domain *genpd) +{ + DEFINE_WAIT(wait); + + mutex_lock(&genpd->lock); + /* + * Wait for the domain to transition into either the active, + * or the power off state. + */ + for (;;) { + prepare_to_wait(&genpd->status_wait_queue, &wait, + TASK_UNINTERRUPTIBLE); + if (genpd->status == GPD_STATE_ACTIVE + || genpd->status == GPD_STATE_POWER_OFF) + break; + mutex_unlock(&genpd->lock); + + schedule(); + + mutex_lock(&genpd->lock); + } + finish_wait(&genpd->status_wait_queue, &wait); +} + +static void genpd_release_lock(struct generic_pm_domain *genpd) +{ + mutex_unlock(&genpd->lock); +} + +static void genpd_set_active(struct generic_pm_domain *genpd) +{ + if (genpd->resume_count == 0) + genpd->status = GPD_STATE_ACTIVE; +} + /** * pm_genpd_poweron - Restore power to a given PM domain and its parents. * @genpd: PM domain to power up. @@ -37,24 +77,34 @@ static void genpd_sd_counter_dec(struct generic_pm_domain *genpd) * Restore power to @genpd and all of its parents so that it is possible to * resume a device belonging to it. */ -static int pm_genpd_poweron(struct generic_pm_domain *genpd) +int pm_genpd_poweron(struct generic_pm_domain *genpd) { + struct generic_pm_domain *parent = genpd->parent; + DEFINE_WAIT(wait); int ret = 0; start: - if (genpd->parent) - mutex_lock(&genpd->parent->lock); - mutex_lock_nested(&genpd->lock, SINGLE_DEPTH_NESTING); + if (parent) { + genpd_acquire_lock(parent); + mutex_lock_nested(&genpd->lock, SINGLE_DEPTH_NESTING); + } else { + mutex_lock(&genpd->lock); + } - if (!genpd->power_is_off + if (genpd->status == GPD_STATE_ACTIVE || (genpd->prepared_count > 0 && genpd->suspend_power_off)) goto out; - if (genpd->parent && genpd->parent->power_is_off) { + if (genpd->status != GPD_STATE_POWER_OFF) { + genpd_set_active(genpd); + goto out; + } + + if (parent && parent->status != GPD_STATE_ACTIVE) { mutex_unlock(&genpd->lock); - mutex_unlock(&genpd->parent->lock); + genpd_release_lock(parent); - ret = pm_genpd_poweron(genpd->parent); + ret = pm_genpd_poweron(parent); if (ret) return ret; @@ -67,14 +117,14 @@ static int pm_genpd_poweron(struct generic_pm_domain *genpd) goto out; } - genpd->power_is_off = false; - if (genpd->parent) - genpd->parent->sd_count++; + genpd_set_active(genpd); + if (parent) + parent->sd_count++; out: mutex_unlock(&genpd->lock); - if (genpd->parent) - mutex_unlock(&genpd->parent->lock); + if (parent) + genpd_release_lock(parent); return ret; } @@ -90,6 +140,7 @@ static int pm_genpd_poweron(struct generic_pm_domain *genpd) */ static int __pm_genpd_save_device(struct dev_list_entry *dle, struct generic_pm_domain *genpd) + __releases(&genpd->lock) __acquires(&genpd->lock) { struct device *dev = dle->dev; struct device_driver *drv = dev->driver; @@ -98,6 +149,8 @@ static int __pm_genpd_save_device(struct dev_list_entry *dle, if (dle->need_restore) return 0; + mutex_unlock(&genpd->lock); + if (drv && drv->pm && drv->pm->runtime_suspend) { if (genpd->start_device) genpd->start_device(dev); @@ -108,6 +161,8 @@ static int __pm_genpd_save_device(struct dev_list_entry *dle, genpd->stop_device(dev); } + mutex_lock(&genpd->lock); + if (!ret) dle->need_restore = true; @@ -121,6 +176,7 @@ static int __pm_genpd_save_device(struct dev_list_entry *dle, */ static void __pm_genpd_restore_device(struct dev_list_entry *dle, struct generic_pm_domain *genpd) + __releases(&genpd->lock) __acquires(&genpd->lock) { struct device *dev = dle->dev; struct device_driver *drv = dev->driver; @@ -128,6 +184,8 @@ static void __pm_genpd_restore_device(struct dev_list_entry *dle, if (!dle->need_restore) return; + mutex_unlock(&genpd->lock); + if (drv && drv->pm && drv->pm->runtime_resume) { if (genpd->start_device) genpd->start_device(dev); @@ -138,10 +196,39 @@ static void __pm_genpd_restore_device(struct dev_list_entry *dle, genpd->stop_device(dev); } + mutex_lock(&genpd->lock); + dle->need_restore = false; } /** + * genpd_abort_poweroff - Check if a PM domain power off should be aborted. + * @genpd: PM domain to check. + * + * Return true if a PM domain's status changed to GPD_STATE_ACTIVE during + * a "power off" operation, which means that a "power on" has occured in the + * meantime, or if its resume_count field is different from zero, which means + * that one of its devices has been resumed in the meantime. + */ +static bool genpd_abort_poweroff(struct generic_pm_domain *genpd) +{ + return genpd->status == GPD_STATE_ACTIVE || genpd->resume_count > 0; +} + +/** + * genpd_queue_power_off_work - Queue up the execution of pm_genpd_poweroff(). + * @genpd: PM domait to power off. + * + * Queue up the execution of pm_genpd_poweroff() unless it's already been done + * before. + */ +void genpd_queue_power_off_work(struct generic_pm_domain *genpd) +{ + if (!work_pending(&genpd->power_off_work)) + queue_work(pm_wq, &genpd->power_off_work); +} + +/** * pm_genpd_poweroff - Remove power from a given PM domain. * @genpd: PM domain to power down. * @@ -150,13 +237,22 @@ static void __pm_genpd_restore_device(struct dev_list_entry *dle, * the @genpd's devices' drivers and remove power from @genpd. */ static int pm_genpd_poweroff(struct generic_pm_domain *genpd) + __releases(&genpd->lock) __acquires(&genpd->lock) { struct generic_pm_domain *parent; struct dev_list_entry *dle; unsigned int not_suspended; - int ret; + int ret = 0; - if (genpd->power_is_off || genpd->prepared_count > 0) + start: + /* + * Do not try to power off the domain in the following situations: + * (1) The domain is already in the "power off" state. + * (2) System suspend is in progress. + * (3) One of the domain's devices is being resumed right now. + */ + if (genpd->status == GPD_STATE_POWER_OFF || genpd->prepared_count > 0 + || genpd->resume_count > 0) return 0; if (genpd->sd_count > 0) @@ -170,35 +266,76 @@ static int pm_genpd_poweroff(struct generic_pm_domain *genpd) if (not_suspended > genpd->in_progress) return -EBUSY; + if (genpd->poweroff_task) { + /* + * Another instance of pm_genpd_poweroff() is executing + * callbacks, so tell it to start over and return. + */ + genpd->status = GPD_STATE_REPEAT; + return 0; + } + if (genpd->gov && genpd->gov->power_down_ok) { if (!genpd->gov->power_down_ok(&genpd->domain)) return -EAGAIN; } + genpd->status = GPD_STATE_BUSY; + genpd->poweroff_task = current; + list_for_each_entry_reverse(dle, &genpd->dev_list, node) { ret = __pm_genpd_save_device(dle, genpd); - if (ret) - goto err_dev; - } + if (ret) { + genpd_set_active(genpd); + goto out; + } - if (genpd->power_off) - genpd->power_off(genpd); + if (genpd_abort_poweroff(genpd)) + goto out; - genpd->power_is_off = true; + if (genpd->status == GPD_STATE_REPEAT) { + genpd->poweroff_task = NULL; + goto start; + } + } parent = genpd->parent; if (parent) { - genpd_sd_counter_dec(parent); - if (parent->sd_count == 0) - queue_work(pm_wq, &parent->power_off_work); + mutex_unlock(&genpd->lock); + + genpd_acquire_lock(parent); + mutex_lock_nested(&genpd->lock, SINGLE_DEPTH_NESTING); + + if (genpd_abort_poweroff(genpd)) { + genpd_release_lock(parent); + goto out; + } } - return 0; + if (genpd->power_off) { + ret = genpd->power_off(genpd); + if (ret == -EBUSY) { + genpd_set_active(genpd); + if (parent) + genpd_release_lock(parent); + + goto out; + } + } + + genpd->status = GPD_STATE_POWER_OFF; + + if (parent) { + genpd_sd_counter_dec(parent); + if (parent->sd_count == 0) + genpd_queue_power_off_work(parent); - err_dev: - list_for_each_entry_continue(dle, &genpd->dev_list, node) - __pm_genpd_restore_device(dle, genpd); + genpd_release_lock(parent); + } + out: + genpd->poweroff_task = NULL; + wake_up_all(&genpd->status_wait_queue); return ret; } @@ -212,13 +349,9 @@ static void genpd_power_off_work_fn(struct work_struct *work) genpd = container_of(work, struct generic_pm_domain, power_off_work); - if (genpd->parent) - mutex_lock(&genpd->parent->lock); - mutex_lock_nested(&genpd->lock, SINGLE_DEPTH_NESTING); + genpd_acquire_lock(genpd); pm_genpd_poweroff(genpd); - mutex_unlock(&genpd->lock); - if (genpd->parent) - mutex_unlock(&genpd->parent->lock); + genpd_release_lock(genpd); } /** @@ -239,23 +372,17 @@ static int pm_genpd_runtime_suspend(struct device *dev) if (IS_ERR(genpd)) return -EINVAL; - if (genpd->parent) - mutex_lock(&genpd->parent->lock); - mutex_lock_nested(&genpd->lock, SINGLE_DEPTH_NESTING); - if (genpd->stop_device) { int ret = genpd->stop_device(dev); if (ret) - goto out; + return ret; } + + mutex_lock(&genpd->lock); genpd->in_progress++; pm_genpd_poweroff(genpd); genpd->in_progress--; - - out: mutex_unlock(&genpd->lock); - if (genpd->parent) - mutex_unlock(&genpd->parent->lock); return 0; } @@ -276,9 +403,6 @@ static void __pm_genpd_runtime_resume(struct device *dev, break; } } - - if (genpd->start_device) - genpd->start_device(dev); } /** @@ -292,6 +416,7 @@ static void __pm_genpd_runtime_resume(struct device *dev, static int pm_genpd_runtime_resume(struct device *dev) { struct generic_pm_domain *genpd; + DEFINE_WAIT(wait); int ret; dev_dbg(dev, "%s()\n", __func__); @@ -305,9 +430,34 @@ static int pm_genpd_runtime_resume(struct device *dev) return ret; mutex_lock(&genpd->lock); + genpd->status = GPD_STATE_BUSY; + genpd->resume_count++; + for (;;) { + prepare_to_wait(&genpd->status_wait_queue, &wait, + TASK_UNINTERRUPTIBLE); + /* + * If current is the powering off task, we have been called + * reentrantly from one of the device callbacks, so we should + * not wait. + */ + if (!genpd->poweroff_task || genpd->poweroff_task == current) + break; + mutex_unlock(&genpd->lock); + + schedule(); + + mutex_lock(&genpd->lock); + } + finish_wait(&genpd->status_wait_queue, &wait); __pm_genpd_runtime_resume(dev, genpd); + genpd->resume_count--; + genpd_set_active(genpd); + wake_up_all(&genpd->status_wait_queue); mutex_unlock(&genpd->lock); + if (genpd->start_device) + genpd->start_device(dev); + return 0; } @@ -339,7 +489,7 @@ static void pm_genpd_sync_poweroff(struct generic_pm_domain *genpd) { struct generic_pm_domain *parent = genpd->parent; - if (genpd->power_is_off) + if (genpd->status == GPD_STATE_POWER_OFF) return; if (genpd->suspended_count != genpd->device_count || genpd->sd_count > 0) @@ -348,7 +498,7 @@ static void pm_genpd_sync_poweroff(struct generic_pm_domain *genpd) if (genpd->power_off) genpd->power_off(genpd); - genpd->power_is_off = true; + genpd->status = GPD_STATE_POWER_OFF; if (parent) { genpd_sd_counter_dec(parent); pm_genpd_sync_poweroff(parent); @@ -356,6 +506,33 @@ static void pm_genpd_sync_poweroff(struct generic_pm_domain *genpd) } /** + * resume_needed - Check whether to resume a device before system suspend. + * @dev: Device to check. + * @genpd: PM domain the device belongs to. + * + * There are two cases in which a device that can wake up the system from sleep + * states should be resumed by pm_genpd_prepare(): (1) if the device is enabled + * to wake up the system and it has to remain active for this purpose while the + * system is in the sleep state and (2) if the device is not enabled to wake up + * the system from sleep states and it generally doesn't generate wakeup signals + * by itself (those signals are generated on its behalf by other parts of the + * system). In the latter case it may be necessary to reconfigure the device's + * wakeup settings during system suspend, because it may have been set up to + * signal remote wakeup from the system's working state as needed by runtime PM. + * Return 'true' in either of the above cases. + */ +static bool resume_needed(struct device *dev, struct generic_pm_domain *genpd) +{ + bool active_wakeup; + + if (!device_can_wakeup(dev)) + return false; + + active_wakeup = genpd->active_wakeup && genpd->active_wakeup(dev); + return device_may_wakeup(dev) ? active_wakeup : !active_wakeup; +} + +/** * pm_genpd_prepare - Start power transition of a device in a PM domain. * @dev: Device to start the transition of. * @@ -367,6 +544,7 @@ static void pm_genpd_sync_poweroff(struct generic_pm_domain *genpd) static int pm_genpd_prepare(struct device *dev) { struct generic_pm_domain *genpd; + int ret; dev_dbg(dev, "%s()\n", __func__); @@ -374,33 +552,57 @@ static int pm_genpd_prepare(struct device *dev) if (IS_ERR(genpd)) return -EINVAL; - mutex_lock(&genpd->lock); + /* + * If a wakeup request is pending for the device, it should be woken up + * at this point and a system wakeup event should be reported if it's + * set up to wake up the system from sleep states. + */ + pm_runtime_get_noresume(dev); + if (pm_runtime_barrier(dev) && device_may_wakeup(dev)) + pm_wakeup_event(dev, 0); + + if (pm_wakeup_pending()) { + pm_runtime_put_sync(dev); + return -EBUSY; + } + + if (resume_needed(dev, genpd)) + pm_runtime_resume(dev); + + genpd_acquire_lock(genpd); if (genpd->prepared_count++ == 0) - genpd->suspend_power_off = genpd->power_is_off; + genpd->suspend_power_off = genpd->status == GPD_STATE_POWER_OFF; + + genpd_release_lock(genpd); if (genpd->suspend_power_off) { - mutex_unlock(&genpd->lock); + pm_runtime_put_noidle(dev); return 0; } /* - * If the device is in the (runtime) "suspended" state, call - * .start_device() for it, if defined. - */ - if (pm_runtime_suspended(dev)) - __pm_genpd_runtime_resume(dev, genpd); - - /* - * Do not check if runtime resume is pending at this point, because it - * has been taken care of already and if pm_genpd_poweron() ran at this - * point as a result of the check, it would deadlock. + * The PM domain must be in the GPD_STATE_ACTIVE state at this point, + * so pm_genpd_poweron() will return immediately, but if the device + * is suspended (e.g. it's been stopped by .stop_device()), we need + * to make it operational. */ + pm_runtime_resume(dev); __pm_runtime_disable(dev, false); - mutex_unlock(&genpd->lock); + ret = pm_generic_prepare(dev); + if (ret) { + mutex_lock(&genpd->lock); + + if (--genpd->prepared_count == 0) + genpd->suspend_power_off = false; - return pm_generic_prepare(dev); + mutex_unlock(&genpd->lock); + pm_runtime_enable(dev); + } + + pm_runtime_put_sync(dev); + return ret; } /** @@ -716,7 +918,7 @@ static int pm_genpd_restore_noirq(struct device *dev) * guaranteed that this function will never run twice in parallel for * the same PM domain, so it is not necessary to use locking here. */ - genpd->power_is_off = true; + genpd->status = GPD_STATE_POWER_OFF; if (genpd->suspend_power_off) { /* * The boot kernel might put the domain into the power on state, @@ -786,7 +988,9 @@ static void pm_genpd_complete(struct device *dev) if (run_complete) { pm_generic_complete(dev); + pm_runtime_set_active(dev); pm_runtime_enable(dev); + pm_runtime_idle(dev); } } @@ -824,9 +1028,9 @@ int pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev) if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(dev)) return -EINVAL; - mutex_lock(&genpd->lock); + genpd_acquire_lock(genpd); - if (genpd->power_is_off) { + if (genpd->status == GPD_STATE_POWER_OFF) { ret = -EINVAL; goto out; } @@ -858,7 +1062,7 @@ int pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev) spin_unlock_irq(&dev->power.lock); out: - mutex_unlock(&genpd->lock); + genpd_release_lock(genpd); return ret; } @@ -879,7 +1083,7 @@ int pm_genpd_remove_device(struct generic_pm_domain *genpd, if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(dev)) return -EINVAL; - mutex_lock(&genpd->lock); + genpd_acquire_lock(genpd); if (genpd->prepared_count > 0) { ret = -EAGAIN; @@ -903,7 +1107,7 @@ int pm_genpd_remove_device(struct generic_pm_domain *genpd, } out: - mutex_unlock(&genpd->lock); + genpd_release_lock(genpd); return ret; } @@ -922,9 +1126,19 @@ int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(new_subdomain)) return -EINVAL; - mutex_lock(&genpd->lock); + start: + genpd_acquire_lock(genpd); + mutex_lock_nested(&new_subdomain->lock, SINGLE_DEPTH_NESTING); + + if (new_subdomain->status != GPD_STATE_POWER_OFF + && new_subdomain->status != GPD_STATE_ACTIVE) { + mutex_unlock(&new_subdomain->lock); + genpd_release_lock(genpd); + goto start; + } - if (genpd->power_is_off && !new_subdomain->power_is_off) { + if (genpd->status == GPD_STATE_POWER_OFF + && new_subdomain->status != GPD_STATE_POWER_OFF) { ret = -EINVAL; goto out; } @@ -936,17 +1150,14 @@ int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, } } - mutex_lock_nested(&new_subdomain->lock, SINGLE_DEPTH_NESTING); - list_add_tail(&new_subdomain->sd_node, &genpd->sd_list); new_subdomain->parent = genpd; - if (!subdomain->power_is_off) + if (subdomain->status != GPD_STATE_POWER_OFF) genpd->sd_count++; - mutex_unlock(&new_subdomain->lock); - out: - mutex_unlock(&genpd->lock); + mutex_unlock(&new_subdomain->lock); + genpd_release_lock(genpd); return ret; } @@ -965,7 +1176,8 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(target)) return -EINVAL; - mutex_lock(&genpd->lock); + start: + genpd_acquire_lock(genpd); list_for_each_entry(subdomain, &genpd->sd_list, sd_node) { if (subdomain != target) @@ -973,9 +1185,16 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, mutex_lock_nested(&subdomain->lock, SINGLE_DEPTH_NESTING); + if (subdomain->status != GPD_STATE_POWER_OFF + && subdomain->status != GPD_STATE_ACTIVE) { + mutex_unlock(&subdomain->lock); + genpd_release_lock(genpd); + goto start; + } + list_del(&subdomain->sd_node); subdomain->parent = NULL; - if (!subdomain->power_is_off) + if (subdomain->status != GPD_STATE_POWER_OFF) genpd_sd_counter_dec(genpd); mutex_unlock(&subdomain->lock); @@ -984,7 +1203,7 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, break; } - mutex_unlock(&genpd->lock); + genpd_release_lock(genpd); return ret; } @@ -1010,7 +1229,10 @@ void pm_genpd_init(struct generic_pm_domain *genpd, INIT_WORK(&genpd->power_off_work, genpd_power_off_work_fn); genpd->in_progress = 0; genpd->sd_count = 0; - genpd->power_is_off = is_off; + genpd->status = is_off ? GPD_STATE_POWER_OFF : GPD_STATE_ACTIVE; + init_waitqueue_head(&genpd->status_wait_queue); + genpd->poweroff_task = NULL; + genpd->resume_count = 0; genpd->device_count = 0; genpd->suspended_count = 0; genpd->domain.ops.runtime_suspend = pm_genpd_runtime_suspend; @@ -1030,4 +1252,22 @@ void pm_genpd_init(struct generic_pm_domain *genpd, genpd->domain.ops.restore_noirq = pm_genpd_restore_noirq; genpd->domain.ops.restore = pm_genpd_restore; genpd->domain.ops.complete = pm_genpd_complete; + mutex_lock(&gpd_list_lock); + list_add(&genpd->gpd_list_node, &gpd_list); + mutex_unlock(&gpd_list_lock); +} + +/** + * pm_genpd_poweroff_unused - Power off all PM domains with no devices in use. + */ +void pm_genpd_poweroff_unused(void) +{ + struct generic_pm_domain *genpd; + + mutex_lock(&gpd_list_lock); + + list_for_each_entry(genpd, &gpd_list, gpd_list_node) + genpd_queue_power_off_work(genpd); + + mutex_unlock(&gpd_list_lock); } diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c index 56a6899..5cc1232 100644 --- a/drivers/base/power/opp.c +++ b/drivers/base/power/opp.c @@ -625,4 +625,21 @@ int opp_init_cpufreq_table(struct device *dev, return 0; } + +/** + * opp_free_cpufreq_table() - free the cpufreq table + * @dev: device for which we do this operation + * @table: table to free + * + * Free up the table allocated by opp_init_cpufreq_table + */ +void opp_free_cpufreq_table(struct device *dev, + struct cpufreq_frequency_table **table) +{ + if (!table) + return; + + kfree(*table); + *table = NULL; +} #endif /* CONFIG_CPU_FREQ */ diff --git a/drivers/base/power/trace.c b/drivers/base/power/trace.c index c80e138..af10abe 100644 --- a/drivers/base/power/trace.c +++ b/drivers/base/power/trace.c @@ -112,7 +112,7 @@ static unsigned int read_magic_time(void) unsigned int val; get_rtc_time(&time); - pr_info("Time: %2d:%02d:%02d Date: %02d/%02d/%02d\n", + pr_info("RTC time: %2d:%02d:%02d, date: %02d/%02d/%02d\n", time.tm_hour, time.tm_min, time.tm_sec, time.tm_mon + 1, time.tm_mday, time.tm_year % 100); val = time.tm_year; /* 100 years */ diff --git a/drivers/base/syscore.c b/drivers/base/syscore.c index c126db3..e8d11b6 100644 --- a/drivers/base/syscore.c +++ b/drivers/base/syscore.c @@ -9,6 +9,7 @@ #include <linux/syscore_ops.h> #include <linux/mutex.h> #include <linux/module.h> +#include <linux/interrupt.h> static LIST_HEAD(syscore_ops_list); static DEFINE_MUTEX(syscore_ops_lock); @@ -48,6 +49,13 @@ int syscore_suspend(void) struct syscore_ops *ops; int ret = 0; + pr_debug("Checking wakeup interrupts\n"); + + /* Return error code if there are any wakeup interrupts pending. */ + ret = check_wakeup_irqs(); + if (ret) + return ret; + WARN_ONCE(!irqs_disabled(), "Interrupts enabled before system core suspend.\n"); |