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Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/bus.c2
-rw-r--r--drivers/base/core.c16
-rw-r--r--drivers/base/devtmpfs.c19
-rw-r--r--drivers/base/driver.c4
-rw-r--r--drivers/base/memory.c19
-rw-r--r--drivers/base/platform.c1
-rw-r--r--drivers/base/power/main.c128
-rw-r--r--drivers/base/power/runtime.c45
8 files changed, 195 insertions, 39 deletions
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 63c143e54a5..c0c5a43d9fb 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -703,9 +703,9 @@ int bus_add_driver(struct device_driver *drv)
return 0;
out_unregister:
+ kobject_put(&priv->kobj);
kfree(drv->p);
drv->p = NULL;
- kobject_put(&priv->kobj);
out_put_bus:
bus_put(bus);
return error;
diff --git a/drivers/base/core.c b/drivers/base/core.c
index f1290cbd135..28202577042 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -446,7 +446,8 @@ struct kset *devices_kset;
* @dev: device.
* @attr: device attribute descriptor.
*/
-int device_create_file(struct device *dev, struct device_attribute *attr)
+int device_create_file(struct device *dev,
+ const struct device_attribute *attr)
{
int error = 0;
if (dev)
@@ -459,7 +460,8 @@ int device_create_file(struct device *dev, struct device_attribute *attr)
* @dev: device.
* @attr: device attribute descriptor.
*/
-void device_remove_file(struct device *dev, struct device_attribute *attr)
+void device_remove_file(struct device *dev,
+ const struct device_attribute *attr)
{
if (dev)
sysfs_remove_file(&dev->kobj, &attr->attr);
@@ -470,7 +472,8 @@ void device_remove_file(struct device *dev, struct device_attribute *attr)
* @dev: device.
* @attr: device binary attribute descriptor.
*/
-int device_create_bin_file(struct device *dev, struct bin_attribute *attr)
+int device_create_bin_file(struct device *dev,
+ const struct bin_attribute *attr)
{
int error = -EINVAL;
if (dev)
@@ -484,7 +487,8 @@ EXPORT_SYMBOL_GPL(device_create_bin_file);
* @dev: device.
* @attr: device binary attribute descriptor.
*/
-void device_remove_bin_file(struct device *dev, struct bin_attribute *attr)
+void device_remove_bin_file(struct device *dev,
+ const struct bin_attribute *attr)
{
if (dev)
sysfs_remove_bin_file(&dev->kobj, attr);
@@ -905,8 +909,10 @@ int device_add(struct device *dev)
dev->init_name = NULL;
}
- if (!dev_name(dev))
+ if (!dev_name(dev)) {
+ error = -EINVAL;
goto name_error;
+ }
pr_debug("device: '%s': %s\n", dev_name(dev), __func__);
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
index 50375bb8e51..090dd485130 100644
--- a/drivers/base/devtmpfs.c
+++ b/drivers/base/devtmpfs.c
@@ -32,7 +32,7 @@ static int dev_mount = 1;
static int dev_mount;
#endif
-static rwlock_t dirlock;
+static DEFINE_MUTEX(dirlock);
static int __init mount_param(char *str)
{
@@ -93,7 +93,7 @@ static int create_path(const char *nodepath)
{
int err;
- read_lock(&dirlock);
+ mutex_lock(&dirlock);
err = dev_mkdir(nodepath, 0755);
if (err == -ENOENT) {
char *path;
@@ -101,8 +101,10 @@ static int create_path(const char *nodepath)
/* parent directories do not exist, create them */
path = kstrdup(nodepath, GFP_KERNEL);
- if (!path)
- return -ENOMEM;
+ if (!path) {
+ err = -ENOMEM;
+ goto out;
+ }
s = path;
for (;;) {
s = strchr(s, '/');
@@ -117,7 +119,8 @@ static int create_path(const char *nodepath)
}
kfree(path);
}
- read_unlock(&dirlock);
+out:
+ mutex_unlock(&dirlock);
return err;
}
@@ -229,7 +232,7 @@ static int delete_path(const char *nodepath)
if (!path)
return -ENOMEM;
- write_lock(&dirlock);
+ mutex_lock(&dirlock);
for (;;) {
char *base;
@@ -241,7 +244,7 @@ static int delete_path(const char *nodepath)
if (err)
break;
}
- write_unlock(&dirlock);
+ mutex_unlock(&dirlock);
kfree(path);
return err;
@@ -352,8 +355,6 @@ int __init devtmpfs_init(void)
int err;
struct vfsmount *mnt;
- rwlock_init(&dirlock);
-
err = register_filesystem(&dev_fs_type);
if (err) {
printk(KERN_ERR "devtmpfs: unable to register devtmpfs "
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index f367885a764..90c9fff09ea 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -98,7 +98,7 @@ EXPORT_SYMBOL_GPL(driver_find_device);
* @attr: driver attribute descriptor.
*/
int driver_create_file(struct device_driver *drv,
- struct driver_attribute *attr)
+ const struct driver_attribute *attr)
{
int error;
if (drv)
@@ -115,7 +115,7 @@ EXPORT_SYMBOL_GPL(driver_create_file);
* @attr: driver attribute descriptor.
*/
void driver_remove_file(struct device_driver *drv,
- struct driver_attribute *attr)
+ const struct driver_attribute *attr)
{
if (drv)
sysfs_remove_file(&drv->p->kobj, &attr->attr);
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index c4c8f2e1dd1..d7d77d4a402 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -63,6 +63,20 @@ void unregister_memory_notifier(struct notifier_block *nb)
}
EXPORT_SYMBOL(unregister_memory_notifier);
+static ATOMIC_NOTIFIER_HEAD(memory_isolate_chain);
+
+int register_memory_isolate_notifier(struct notifier_block *nb)
+{
+ return atomic_notifier_chain_register(&memory_isolate_chain, nb);
+}
+EXPORT_SYMBOL(register_memory_isolate_notifier);
+
+void unregister_memory_isolate_notifier(struct notifier_block *nb)
+{
+ atomic_notifier_chain_unregister(&memory_isolate_chain, nb);
+}
+EXPORT_SYMBOL(unregister_memory_isolate_notifier);
+
/*
* register_memory - Setup a sysfs device for a memory block
*/
@@ -157,6 +171,11 @@ int memory_notify(unsigned long val, void *v)
return blocking_notifier_call_chain(&memory_chain, val, v);
}
+int memory_isolate_notify(unsigned long val, void *v)
+{
+ return atomic_notifier_call_chain(&memory_isolate_chain, val, v);
+}
+
/*
* MEMORY_HOTPLUG depends on SPARSEMEM in mm/Kconfig, so it is
* OK to have direct references to sparsemem variables in here.
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 9d2ee25deaf..58efaf2f125 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -441,6 +441,7 @@ error:
platform_device_put(pdev);
return ERR_PTR(retval);
}
+EXPORT_SYMBOL_GPL(platform_device_register_data);
static int platform_drv_probe(struct device *_dev)
{
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 1a216c114a0..48adf80926a 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -161,6 +161,32 @@ void device_pm_move_last(struct device *dev)
list_move_tail(&dev->power.entry, &dpm_list);
}
+static ktime_t initcall_debug_start(struct device *dev)
+{
+ ktime_t calltime = ktime_set(0, 0);
+
+ if (initcall_debug) {
+ pr_info("calling %s+ @ %i\n",
+ dev_name(dev), task_pid_nr(current));
+ calltime = ktime_get();
+ }
+
+ return calltime;
+}
+
+static void initcall_debug_report(struct device *dev, ktime_t calltime,
+ int error)
+{
+ ktime_t delta, rettime;
+
+ if (initcall_debug) {
+ rettime = ktime_get();
+ delta = ktime_sub(rettime, calltime);
+ pr_info("call %s+ returned %d after %Ld usecs\n", dev_name(dev),
+ error, (unsigned long long)ktime_to_ns(delta) >> 10);
+ }
+}
+
/**
* pm_op - Execute the PM operation appropriate for given PM event.
* @dev: Device to handle.
@@ -172,13 +198,9 @@ static int pm_op(struct device *dev,
pm_message_t state)
{
int error = 0;
- ktime_t calltime, delta, rettime;
+ ktime_t calltime;
- if (initcall_debug) {
- pr_info("calling %s+ @ %i\n",
- dev_name(dev), task_pid_nr(current));
- calltime = ktime_get();
- }
+ calltime = initcall_debug_start(dev);
switch (state.event) {
#ifdef CONFIG_SUSPEND
@@ -227,12 +249,7 @@ static int pm_op(struct device *dev,
error = -EINVAL;
}
- if (initcall_debug) {
- rettime = ktime_get();
- delta = ktime_sub(rettime, calltime);
- pr_info("call %s+ returned %d after %Ld usecs\n", dev_name(dev),
- error, (unsigned long long)ktime_to_ns(delta) >> 10);
- }
+ initcall_debug_report(dev, calltime, error);
return error;
}
@@ -309,8 +326,9 @@ static int pm_noirq_op(struct device *dev,
if (initcall_debug) {
rettime = ktime_get();
delta = ktime_sub(rettime, calltime);
- printk("initcall %s_i+ returned %d after %Ld usecs\n", dev_name(dev),
- error, (unsigned long long)ktime_to_ns(delta) >> 10);
+ printk("initcall %s_i+ returned %d after %Ld usecs\n",
+ dev_name(dev), error,
+ (unsigned long long)ktime_to_ns(delta) >> 10);
}
return error;
@@ -354,6 +372,23 @@ static void pm_dev_err(struct device *dev, pm_message_t state, char *info,
kobject_name(&dev->kobj), pm_verb(state.event), info, error);
}
+static void dpm_show_time(ktime_t starttime, pm_message_t state, char *info)
+{
+ ktime_t calltime;
+ s64 usecs64;
+ int usecs;
+
+ calltime = ktime_get();
+ usecs64 = ktime_to_ns(ktime_sub(calltime, starttime));
+ do_div(usecs64, NSEC_PER_USEC);
+ usecs = usecs64;
+ if (usecs == 0)
+ usecs = 1;
+ pr_info("PM: %s%s%s of devices complete after %ld.%03ld msecs\n",
+ info ?: "", info ? " " : "", pm_verb(state.event),
+ usecs / USEC_PER_MSEC, usecs % USEC_PER_MSEC);
+}
+
/*------------------------- Resume routines -------------------------*/
/**
@@ -390,6 +425,7 @@ static int device_resume_noirq(struct device *dev, pm_message_t state)
void dpm_resume_noirq(pm_message_t state)
{
struct device *dev;
+ ktime_t starttime = ktime_get();
mutex_lock(&dpm_list_mtx);
transition_started = false;
@@ -403,11 +439,32 @@ void dpm_resume_noirq(pm_message_t state)
pm_dev_err(dev, state, " early", error);
}
mutex_unlock(&dpm_list_mtx);
+ dpm_show_time(starttime, state, "early");
resume_device_irqs();
}
EXPORT_SYMBOL_GPL(dpm_resume_noirq);
/**
+ * legacy_resume - Execute a legacy (bus or class) resume callback for device.
+ * dev: Device to resume.
+ * cb: Resume callback to execute.
+ */
+static int legacy_resume(struct device *dev, int (*cb)(struct device *dev))
+{
+ int error;
+ ktime_t calltime;
+
+ calltime = initcall_debug_start(dev);
+
+ error = cb(dev);
+ suspend_report_result(cb, error);
+
+ initcall_debug_report(dev, calltime, error);
+
+ return error;
+}
+
+/**
* device_resume - Execute "resume" callbacks for given device.
* @dev: Device to handle.
* @state: PM transition of the system being carried out.
@@ -427,7 +484,7 @@ static int device_resume(struct device *dev, pm_message_t state)
error = pm_op(dev, dev->bus->pm, state);
} else if (dev->bus->resume) {
pm_dev_dbg(dev, state, "legacy ");
- error = dev->bus->resume(dev);
+ error = legacy_resume(dev, dev->bus->resume);
}
if (error)
goto End;
@@ -448,7 +505,7 @@ static int device_resume(struct device *dev, pm_message_t state)
error = pm_op(dev, dev->class->pm, state);
} else if (dev->class->resume) {
pm_dev_dbg(dev, state, "legacy class ");
- error = dev->class->resume(dev);
+ error = legacy_resume(dev, dev->class->resume);
}
}
End:
@@ -468,6 +525,7 @@ static int device_resume(struct device *dev, pm_message_t state)
static void dpm_resume(pm_message_t state)
{
struct list_head list;
+ ktime_t starttime = ktime_get();
INIT_LIST_HEAD(&list);
mutex_lock(&dpm_list_mtx);
@@ -496,6 +554,7 @@ static void dpm_resume(pm_message_t state)
}
list_splice(&list, &dpm_list);
mutex_unlock(&dpm_list_mtx);
+ dpm_show_time(starttime, state, NULL);
}
/**
@@ -548,7 +607,7 @@ static void dpm_complete(pm_message_t state)
mutex_unlock(&dpm_list_mtx);
device_complete(dev, state);
- pm_runtime_put_noidle(dev);
+ pm_runtime_put_sync(dev);
mutex_lock(&dpm_list_mtx);
}
@@ -628,6 +687,7 @@ static int device_suspend_noirq(struct device *dev, pm_message_t state)
int dpm_suspend_noirq(pm_message_t state)
{
struct device *dev;
+ ktime_t starttime = ktime_get();
int error = 0;
suspend_device_irqs();
@@ -643,11 +703,34 @@ int dpm_suspend_noirq(pm_message_t state)
mutex_unlock(&dpm_list_mtx);
if (error)
dpm_resume_noirq(resume_event(state));
+ else
+ dpm_show_time(starttime, state, "late");
return error;
}
EXPORT_SYMBOL_GPL(dpm_suspend_noirq);
/**
+ * legacy_suspend - Execute a legacy (bus or class) suspend callback for device.
+ * dev: Device to suspend.
+ * cb: Suspend callback to execute.
+ */
+static int legacy_suspend(struct device *dev, pm_message_t state,
+ int (*cb)(struct device *dev, pm_message_t state))
+{
+ int error;
+ ktime_t calltime;
+
+ calltime = initcall_debug_start(dev);
+
+ error = cb(dev, state);
+ suspend_report_result(cb, error);
+
+ initcall_debug_report(dev, calltime, error);
+
+ return error;
+}
+
+/**
* device_suspend - Execute "suspend" callbacks for given device.
* @dev: Device to handle.
* @state: PM transition of the system being carried out.
@@ -664,8 +747,7 @@ static int device_suspend(struct device *dev, pm_message_t state)
error = pm_op(dev, dev->class->pm, state);
} else if (dev->class->suspend) {
pm_dev_dbg(dev, state, "legacy class ");
- error = dev->class->suspend(dev, state);
- suspend_report_result(dev->class->suspend, error);
+ error = legacy_suspend(dev, state, dev->class->suspend);
}
if (error)
goto End;
@@ -686,8 +768,7 @@ static int device_suspend(struct device *dev, pm_message_t state)
error = pm_op(dev, dev->bus->pm, state);
} else if (dev->bus->suspend) {
pm_dev_dbg(dev, state, "legacy ");
- error = dev->bus->suspend(dev, state);
- suspend_report_result(dev->bus->suspend, error);
+ error = legacy_suspend(dev, state, dev->bus->suspend);
}
}
End:
@@ -703,6 +784,7 @@ static int device_suspend(struct device *dev, pm_message_t state)
static int dpm_suspend(pm_message_t state)
{
struct list_head list;
+ ktime_t starttime = ktime_get();
int error = 0;
INIT_LIST_HEAD(&list);
@@ -728,6 +810,8 @@ static int dpm_suspend(pm_message_t state)
}
list_splice(&list, dpm_list.prev);
mutex_unlock(&dpm_list_mtx);
+ if (!error)
+ dpm_show_time(starttime, state, NULL);
return error;
}
@@ -796,7 +880,7 @@ static int dpm_prepare(pm_message_t state)
pm_runtime_get_noresume(dev);
if (pm_runtime_barrier(dev) && device_may_wakeup(dev)) {
/* Wake-up requested during system sleep transition. */
- pm_runtime_put_noidle(dev);
+ pm_runtime_put_sync(dev);
error = -EBUSY;
} else {
error = device_prepare(dev, state);
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 40d7720a4b2..f8b044e8aef 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -85,6 +85,19 @@ static int __pm_runtime_idle(struct device *dev)
dev->bus->pm->runtime_idle(dev);
spin_lock_irq(&dev->power.lock);
+ } else if (dev->type && dev->type->pm && dev->type->pm->runtime_idle) {
+ spin_unlock_irq(&dev->power.lock);
+
+ dev->type->pm->runtime_idle(dev);
+
+ spin_lock_irq(&dev->power.lock);
+ } else if (dev->class && dev->class->pm
+ && dev->class->pm->runtime_idle) {
+ spin_unlock_irq(&dev->power.lock);
+
+ dev->class->pm->runtime_idle(dev);
+
+ spin_lock_irq(&dev->power.lock);
}
dev->power.idle_notification = false;
@@ -194,6 +207,22 @@ int __pm_runtime_suspend(struct device *dev, bool from_wq)
spin_lock_irq(&dev->power.lock);
dev->power.runtime_error = retval;
+ } else if (dev->type && dev->type->pm
+ && dev->type->pm->runtime_suspend) {
+ spin_unlock_irq(&dev->power.lock);
+
+ retval = dev->type->pm->runtime_suspend(dev);
+
+ spin_lock_irq(&dev->power.lock);
+ dev->power.runtime_error = retval;
+ } else if (dev->class && dev->class->pm
+ && dev->class->pm->runtime_suspend) {
+ spin_unlock_irq(&dev->power.lock);
+
+ retval = dev->class->pm->runtime_suspend(dev);
+
+ spin_lock_irq(&dev->power.lock);
+ dev->power.runtime_error = retval;
} else {
retval = -ENOSYS;
}
@@ -359,6 +388,22 @@ int __pm_runtime_resume(struct device *dev, bool from_wq)
spin_lock_irq(&dev->power.lock);
dev->power.runtime_error = retval;
+ } else if (dev->type && dev->type->pm
+ && dev->type->pm->runtime_resume) {
+ spin_unlock_irq(&dev->power.lock);
+
+ retval = dev->type->pm->runtime_resume(dev);
+
+ spin_lock_irq(&dev->power.lock);
+ dev->power.runtime_error = retval;
+ } else if (dev->class && dev->class->pm
+ && dev->class->pm->runtime_resume) {
+ spin_unlock_irq(&dev->power.lock);
+
+ retval = dev->class->pm->runtime_resume(dev);
+
+ spin_lock_irq(&dev->power.lock);
+ dev->power.runtime_error = retval;
} else {
retval = -ENOSYS;
}