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Diffstat (limited to 'kernel/power')
-rw-r--r--kernel/power/autosleep.c2
-rw-r--r--kernel/power/main.c99
-rw-r--r--kernel/power/suspend.c65
-rw-r--r--kernel/power/wakelock.c32
4 files changed, 143 insertions, 55 deletions
diff --git a/kernel/power/autosleep.c b/kernel/power/autosleep.c
index 41e83a779e19..9af5a50d3489 100644
--- a/kernel/power/autosleep.c
+++ b/kernel/power/autosleep.c
@@ -116,7 +116,7 @@ int pm_autosleep_set_state(suspend_state_t state)
int __init pm_autosleep_init(void)
{
- autosleep_ws = wakeup_source_register("autosleep");
+ autosleep_ws = wakeup_source_register(NULL, "autosleep");
if (!autosleep_ws)
return -ENOMEM;
diff --git a/kernel/power/main.c b/kernel/power/main.c
index bdbd605c4215..e8710d179b35 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -254,7 +254,6 @@ static ssize_t pm_test_store(struct kobject *kobj, struct kobj_attribute *attr,
power_attr(pm_test);
#endif /* CONFIG_PM_SLEEP_DEBUG */
-#ifdef CONFIG_DEBUG_FS
static char *suspend_step_name(enum suspend_stat_step step)
{
switch (step) {
@@ -275,6 +274,92 @@ static char *suspend_step_name(enum suspend_stat_step step)
}
}
+#define suspend_attr(_name) \
+static ssize_t _name##_show(struct kobject *kobj, \
+ struct kobj_attribute *attr, char *buf) \
+{ \
+ return sprintf(buf, "%d\n", suspend_stats._name); \
+} \
+static struct kobj_attribute _name = __ATTR_RO(_name)
+
+suspend_attr(success);
+suspend_attr(fail);
+suspend_attr(failed_freeze);
+suspend_attr(failed_prepare);
+suspend_attr(failed_suspend);
+suspend_attr(failed_suspend_late);
+suspend_attr(failed_suspend_noirq);
+suspend_attr(failed_resume);
+suspend_attr(failed_resume_early);
+suspend_attr(failed_resume_noirq);
+
+static ssize_t last_failed_dev_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ int index;
+ char *last_failed_dev = NULL;
+
+ index = suspend_stats.last_failed_dev + REC_FAILED_NUM - 1;
+ index %= REC_FAILED_NUM;
+ last_failed_dev = suspend_stats.failed_devs[index];
+
+ return sprintf(buf, "%s\n", last_failed_dev);
+}
+static struct kobj_attribute last_failed_dev = __ATTR_RO(last_failed_dev);
+
+static ssize_t last_failed_errno_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ int index;
+ int last_failed_errno;
+
+ index = suspend_stats.last_failed_errno + REC_FAILED_NUM - 1;
+ index %= REC_FAILED_NUM;
+ last_failed_errno = suspend_stats.errno[index];
+
+ return sprintf(buf, "%d\n", last_failed_errno);
+}
+static struct kobj_attribute last_failed_errno = __ATTR_RO(last_failed_errno);
+
+static ssize_t last_failed_step_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ int index;
+ enum suspend_stat_step step;
+ char *last_failed_step = NULL;
+
+ index = suspend_stats.last_failed_step + REC_FAILED_NUM - 1;
+ index %= REC_FAILED_NUM;
+ step = suspend_stats.failed_steps[index];
+ last_failed_step = suspend_step_name(step);
+
+ return sprintf(buf, "%s\n", last_failed_step);
+}
+static struct kobj_attribute last_failed_step = __ATTR_RO(last_failed_step);
+
+static struct attribute *suspend_attrs[] = {
+ &success.attr,
+ &fail.attr,
+ &failed_freeze.attr,
+ &failed_prepare.attr,
+ &failed_suspend.attr,
+ &failed_suspend_late.attr,
+ &failed_suspend_noirq.attr,
+ &failed_resume.attr,
+ &failed_resume_early.attr,
+ &failed_resume_noirq.attr,
+ &last_failed_dev.attr,
+ &last_failed_errno.attr,
+ &last_failed_step.attr,
+ NULL,
+};
+
+static struct attribute_group suspend_attr_group = {
+ .name = "suspend_stats",
+ .attrs = suspend_attrs,
+};
+
+#ifdef CONFIG_DEBUG_FS
static int suspend_stats_show(struct seq_file *s, void *unused)
{
int i, index, last_dev, last_errno, last_step;
@@ -495,7 +580,7 @@ static suspend_state_t decode_state(const char *buf, size_t n)
len = p ? p - buf : n;
/* Check hibernation first. */
- if (len == 4 && !strncmp(buf, "disk", len))
+ if (len == 4 && str_has_prefix(buf, "disk"))
return PM_SUSPEND_MAX;
#ifdef CONFIG_SUSPEND
@@ -794,6 +879,14 @@ static const struct attribute_group attr_group = {
.attrs = g,
};
+static const struct attribute_group *attr_groups[] = {
+ &attr_group,
+#ifdef CONFIG_PM_SLEEP
+ &suspend_attr_group,
+#endif
+ NULL,
+};
+
struct workqueue_struct *pm_wq;
EXPORT_SYMBOL_GPL(pm_wq);
@@ -815,7 +908,7 @@ static int __init pm_init(void)
power_kobj = kobject_create_and_add("power", NULL);
if (!power_kobj)
return -ENOMEM;
- error = sysfs_create_group(power_kobj, &attr_group);
+ error = sysfs_create_groups(power_kobj, attr_groups);
if (error)
return error;
pm_print_times_init();
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index c874a7026e24..f3b7239f1892 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -121,43 +121,25 @@ static void s2idle_loop(void)
{
pm_pr_dbg("suspend-to-idle\n");
+ /*
+ * Suspend-to-idle equals:
+ * frozen processes + suspended devices + idle processors.
+ * Thus s2idle_enter() should be called right after all devices have
+ * been suspended.
+ *
+ * Wakeups during the noirq suspend of devices may be spurious, so try
+ * to avoid them upfront.
+ */
for (;;) {
- int error;
-
- dpm_noirq_begin();
-
- /*
- * Suspend-to-idle equals
- * frozen processes + suspended devices + idle processors.
- * Thus s2idle_enter() should be called right after
- * all devices have been suspended.
- *
- * Wakeups during the noirq suspend of devices may be spurious,
- * so prevent them from terminating the loop right away.
- */
- error = dpm_noirq_suspend_devices(PMSG_SUSPEND);
- if (!error)
- s2idle_enter();
- else if (error == -EBUSY && pm_wakeup_pending())
- error = 0;
-
- if (!error && s2idle_ops && s2idle_ops->wake)
+ if (s2idle_ops && s2idle_ops->wake)
s2idle_ops->wake();
- dpm_noirq_resume_devices(PMSG_RESUME);
-
- dpm_noirq_end();
-
- if (error)
- break;
-
- if (s2idle_ops && s2idle_ops->sync)
- s2idle_ops->sync();
-
if (pm_wakeup_pending())
break;
pm_wakeup_clear(false);
+
+ s2idle_enter();
}
pm_pr_dbg("resume from suspend-to-idle\n");
@@ -271,14 +253,21 @@ static int platform_suspend_prepare_late(suspend_state_t state)
static int platform_suspend_prepare_noirq(suspend_state_t state)
{
- return state != PM_SUSPEND_TO_IDLE && suspend_ops->prepare_late ?
- suspend_ops->prepare_late() : 0;
+ if (state == PM_SUSPEND_TO_IDLE)
+ return s2idle_ops && s2idle_ops->prepare_late ?
+ s2idle_ops->prepare_late() : 0;
+
+ return suspend_ops->prepare_late ? suspend_ops->prepare_late() : 0;
}
static void platform_resume_noirq(suspend_state_t state)
{
- if (state != PM_SUSPEND_TO_IDLE && suspend_ops->wake)
+ if (state == PM_SUSPEND_TO_IDLE) {
+ if (s2idle_ops && s2idle_ops->restore_early)
+ s2idle_ops->restore_early();
+ } else if (suspend_ops->wake) {
suspend_ops->wake();
+ }
}
static void platform_resume_early(suspend_state_t state)
@@ -415,11 +404,6 @@ static int suspend_enter(suspend_state_t state, bool *wakeup)
if (error)
goto Devices_early_resume;
- if (state == PM_SUSPEND_TO_IDLE && pm_test_level != TEST_PLATFORM) {
- s2idle_loop();
- goto Platform_early_resume;
- }
-
error = dpm_suspend_noirq(PMSG_SUSPEND);
if (error) {
pr_err("noirq suspend of devices failed\n");
@@ -432,6 +416,11 @@ static int suspend_enter(suspend_state_t state, bool *wakeup)
if (suspend_test(TEST_PLATFORM))
goto Platform_wake;
+ if (state == PM_SUSPEND_TO_IDLE) {
+ s2idle_loop();
+ goto Platform_wake;
+ }
+
error = suspend_disable_secondary_cpus();
if (error || suspend_test(TEST_CPUS))
goto Enable_cpus;
diff --git a/kernel/power/wakelock.c b/kernel/power/wakelock.c
index 4210152e56f0..105df4dfc783 100644
--- a/kernel/power/wakelock.c
+++ b/kernel/power/wakelock.c
@@ -27,7 +27,7 @@ static DEFINE_MUTEX(wakelocks_lock);
struct wakelock {
char *name;
struct rb_node node;
- struct wakeup_source ws;
+ struct wakeup_source *ws;
#ifdef CONFIG_PM_WAKELOCKS_GC
struct list_head lru;
#endif
@@ -46,7 +46,7 @@ ssize_t pm_show_wakelocks(char *buf, bool show_active)
for (node = rb_first(&wakelocks_tree); node; node = rb_next(node)) {
wl = rb_entry(node, struct wakelock, node);
- if (wl->ws.active == show_active)
+ if (wl->ws->active == show_active)
str += scnprintf(str, end - str, "%s ", wl->name);
}
if (str > buf)
@@ -112,16 +112,16 @@ static void __wakelocks_gc(struct work_struct *work)
u64 idle_time_ns;
bool active;
- spin_lock_irq(&wl->ws.lock);
- idle_time_ns = ktime_to_ns(ktime_sub(now, wl->ws.last_time));
- active = wl->ws.active;
- spin_unlock_irq(&wl->ws.lock);
+ spin_lock_irq(&wl->ws->lock);
+ idle_time_ns = ktime_to_ns(ktime_sub(now, wl->ws->last_time));
+ active = wl->ws->active;
+ spin_unlock_irq(&wl->ws->lock);
if (idle_time_ns < ((u64)WL_GC_TIME_SEC * NSEC_PER_SEC))
break;
if (!active) {
- wakeup_source_remove(&wl->ws);
+ wakeup_source_unregister(wl->ws);
rb_erase(&wl->node, &wakelocks_tree);
list_del(&wl->lru);
kfree(wl->name);
@@ -187,9 +187,15 @@ static struct wakelock *wakelock_lookup_add(const char *name, size_t len,
kfree(wl);
return ERR_PTR(-ENOMEM);
}
- wl->ws.name = wl->name;
- wl->ws.last_time = ktime_get();
- wakeup_source_add(&wl->ws);
+
+ wl->ws = wakeup_source_register(NULL, wl->name);
+ if (!wl->ws) {
+ kfree(wl->name);
+ kfree(wl);
+ return ERR_PTR(-ENOMEM);
+ }
+ wl->ws->last_time = ktime_get();
+
rb_link_node(&wl->node, parent, node);
rb_insert_color(&wl->node, &wakelocks_tree);
wakelocks_lru_add(wl);
@@ -233,9 +239,9 @@ int pm_wake_lock(const char *buf)
u64 timeout_ms = timeout_ns + NSEC_PER_MSEC - 1;
do_div(timeout_ms, NSEC_PER_MSEC);
- __pm_wakeup_event(&wl->ws, timeout_ms);
+ __pm_wakeup_event(wl->ws, timeout_ms);
} else {
- __pm_stay_awake(&wl->ws);
+ __pm_stay_awake(wl->ws);
}
wakelocks_lru_most_recent(wl);
@@ -271,7 +277,7 @@ int pm_wake_unlock(const char *buf)
ret = PTR_ERR(wl);
goto out;
}
- __pm_relax(&wl->ws);
+ __pm_relax(wl->ws);
wakelocks_lru_most_recent(wl);
wakelocks_gc();
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-19 01:47:03 +0300