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path: root/drivers/base/power/runtime.c
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Diffstat (limited to 'drivers/base/power/runtime.c')
-rw-r--r--drivers/base/power/runtime.c89
1 files changed, 45 insertions, 44 deletions
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 0d4587b15c55..8dc247c974af 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -1,5 +1,5 @@
/*
- * drivers/base/power/runtime.c - Helper functions for device run-time PM
+ * drivers/base/power/runtime.c - Helper functions for device runtime PM
*
* Copyright (c) 2009 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
* Copyright (C) 2010 Alan Stern <stern@rowland.harvard.edu>
@@ -135,8 +135,9 @@ static int rpm_check_suspend_allowed(struct device *dev)
if (dev->power.runtime_error)
retval = -EINVAL;
- else if (atomic_read(&dev->power.usage_count) > 0
- || dev->power.disable_depth > 0)
+ else if (dev->power.disable_depth > 0)
+ retval = -EACCES;
+ else if (atomic_read(&dev->power.usage_count) > 0)
retval = -EAGAIN;
else if (!pm_children_suspended(dev))
retval = -EBUSY;
@@ -158,7 +159,7 @@ static int rpm_check_suspend_allowed(struct device *dev)
* @dev: Device to notify the bus type about.
* @rpmflags: Flag bits.
*
- * Check if the device's run-time PM status allows it to be suspended. If
+ * Check if the device's runtime PM status allows it to be suspended. If
* another idle notification has been started earlier, return immediately. If
* the RPM_ASYNC flag is set then queue an idle-notification request; otherwise
* run the ->runtime_idle() callback directly.
@@ -213,8 +214,8 @@ static int rpm_idle(struct device *dev, int rpmflags)
dev->power.idle_notification = true;
- if (dev->pwr_domain)
- callback = dev->pwr_domain->ops.runtime_idle;
+ if (dev->pm_domain)
+ callback = dev->pm_domain->ops.runtime_idle;
else if (dev->type && dev->type->pm)
callback = dev->type->pm->runtime_idle;
else if (dev->class && dev->class->pm)
@@ -262,15 +263,15 @@ static int rpm_callback(int (*cb)(struct device *), struct device *dev)
spin_lock_irq(&dev->power.lock);
}
dev->power.runtime_error = retval;
- return retval;
+ return retval != -EACCES ? retval : -EIO;
}
/**
- * rpm_suspend - Carry out run-time suspend of given device.
+ * rpm_suspend - Carry out runtime suspend of given device.
* @dev: Device to suspend.
* @rpmflags: Flag bits.
*
- * Check if the device's run-time PM status allows it to be suspended. If
+ * Check if the device's runtime PM status allows it to be suspended. If
* another suspend has been started earlier, either return immediately or wait
* for it to finish, depending on the RPM_NOWAIT and RPM_ASYNC flags. Cancel a
* pending idle notification. If the RPM_ASYNC flag is set then queue a
@@ -374,8 +375,8 @@ static int rpm_suspend(struct device *dev, int rpmflags)
__update_runtime_status(dev, RPM_SUSPENDING);
- if (dev->pwr_domain)
- callback = dev->pwr_domain->ops.runtime_suspend;
+ if (dev->pm_domain)
+ callback = dev->pm_domain->ops.runtime_suspend;
else if (dev->type && dev->type->pm)
callback = dev->type->pm->runtime_suspend;
else if (dev->class && dev->class->pm)
@@ -388,7 +389,7 @@ static int rpm_suspend(struct device *dev, int rpmflags)
retval = rpm_callback(callback, dev);
if (retval) {
__update_runtime_status(dev, RPM_ACTIVE);
- dev->power.deferred_resume = 0;
+ dev->power.deferred_resume = false;
if (retval == -EAGAIN || retval == -EBUSY)
dev->power.runtime_error = 0;
else
@@ -429,11 +430,11 @@ static int rpm_suspend(struct device *dev, int rpmflags)
}
/**
- * rpm_resume - Carry out run-time resume of given device.
+ * rpm_resume - Carry out runtime resume of given device.
* @dev: Device to resume.
* @rpmflags: Flag bits.
*
- * Check if the device's run-time PM status allows it to be resumed. Cancel
+ * Check if the device's runtime PM status allows it to be resumed. Cancel
* any scheduled or pending requests. If another resume has been started
* earlier, either return immediately or wait for it to finish, depending on the
* RPM_NOWAIT and RPM_ASYNC flags. Similarly, if there's a suspend running in
@@ -458,7 +459,7 @@ static int rpm_resume(struct device *dev, int rpmflags)
if (dev->power.runtime_error)
retval = -EINVAL;
else if (dev->power.disable_depth > 0)
- retval = -EAGAIN;
+ retval = -EACCES;
if (retval)
goto out;
@@ -550,7 +551,7 @@ static int rpm_resume(struct device *dev, int rpmflags)
spin_lock(&parent->power.lock);
/*
- * We can resume if the parent's run-time PM is disabled or it
+ * We can resume if the parent's runtime PM is disabled or it
* is set to ignore children.
*/
if (!parent->power.disable_depth
@@ -573,8 +574,8 @@ static int rpm_resume(struct device *dev, int rpmflags)
__update_runtime_status(dev, RPM_RESUMING);
- if (dev->pwr_domain)
- callback = dev->pwr_domain->ops.runtime_resume;
+ if (dev->pm_domain)
+ callback = dev->pm_domain->ops.runtime_resume;
else if (dev->type && dev->type->pm)
callback = dev->type->pm->runtime_resume;
else if (dev->class && dev->class->pm)
@@ -614,11 +615,11 @@ static int rpm_resume(struct device *dev, int rpmflags)
}
/**
- * pm_runtime_work - Universal run-time PM work function.
+ * pm_runtime_work - Universal runtime PM work function.
* @work: Work structure used for scheduling the execution of this function.
*
* Use @work to get the device object the work is to be done for, determine what
- * is to be done and execute the appropriate run-time PM function.
+ * is to be done and execute the appropriate runtime PM function.
*/
static void pm_runtime_work(struct work_struct *work)
{
@@ -717,7 +718,7 @@ int pm_schedule_suspend(struct device *dev, unsigned int delay)
EXPORT_SYMBOL_GPL(pm_schedule_suspend);
/**
- * __pm_runtime_idle - Entry point for run-time idle operations.
+ * __pm_runtime_idle - Entry point for runtime idle operations.
* @dev: Device to send idle notification for.
* @rpmflags: Flag bits.
*
@@ -746,7 +747,7 @@ int __pm_runtime_idle(struct device *dev, int rpmflags)
EXPORT_SYMBOL_GPL(__pm_runtime_idle);
/**
- * __pm_runtime_suspend - Entry point for run-time put/suspend operations.
+ * __pm_runtime_suspend - Entry point for runtime put/suspend operations.
* @dev: Device to suspend.
* @rpmflags: Flag bits.
*
@@ -775,7 +776,7 @@ int __pm_runtime_suspend(struct device *dev, int rpmflags)
EXPORT_SYMBOL_GPL(__pm_runtime_suspend);
/**
- * __pm_runtime_resume - Entry point for run-time resume operations.
+ * __pm_runtime_resume - Entry point for runtime resume operations.
* @dev: Device to resume.
* @rpmflags: Flag bits.
*
@@ -801,11 +802,11 @@ int __pm_runtime_resume(struct device *dev, int rpmflags)
EXPORT_SYMBOL_GPL(__pm_runtime_resume);
/**
- * __pm_runtime_set_status - Set run-time PM status of a device.
+ * __pm_runtime_set_status - Set runtime PM status of a device.
* @dev: Device to handle.
- * @status: New run-time PM status of the device.
+ * @status: New runtime PM status of the device.
*
- * If run-time PM of the device is disabled or its power.runtime_error field is
+ * If runtime PM of the device is disabled or its power.runtime_error field is
* different from zero, the status may be changed either to RPM_ACTIVE, or to
* RPM_SUSPENDED, as long as that reflects the actual state of the device.
* However, if the device has a parent and the parent is not active, and the
@@ -851,7 +852,7 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status)
/*
* It is invalid to put an active child under a parent that is
- * not active, has run-time PM enabled and the
+ * not active, has runtime PM enabled and the
* 'power.ignore_children' flag unset.
*/
if (!parent->power.disable_depth
@@ -885,7 +886,7 @@ EXPORT_SYMBOL_GPL(__pm_runtime_set_status);
* @dev: Device to handle.
*
* Flush all pending requests for the device from pm_wq and wait for all
- * run-time PM operations involving the device in progress to complete.
+ * runtime PM operations involving the device in progress to complete.
*
* Should be called under dev->power.lock with interrupts disabled.
*/
@@ -933,7 +934,7 @@ static void __pm_runtime_barrier(struct device *dev)
* Prevent the device from being suspended by incrementing its usage counter and
* if there's a pending resume request for the device, wake the device up.
* Next, make sure that all pending requests for the device have been flushed
- * from pm_wq and wait for all run-time PM operations involving the device in
+ * from pm_wq and wait for all runtime PM operations involving the device in
* progress to complete.
*
* Return value:
@@ -963,18 +964,18 @@ int pm_runtime_barrier(struct device *dev)
EXPORT_SYMBOL_GPL(pm_runtime_barrier);
/**
- * __pm_runtime_disable - Disable run-time PM of a device.
+ * __pm_runtime_disable - Disable runtime PM of a device.
* @dev: Device to handle.
* @check_resume: If set, check if there's a resume request for the device.
*
* Increment power.disable_depth for the device and if was zero previously,
- * cancel all pending run-time PM requests for the device and wait for all
+ * cancel all pending runtime PM requests for the device and wait for all
* operations in progress to complete. The device can be either active or
- * suspended after its run-time PM has been disabled.
+ * suspended after its runtime PM has been disabled.
*
* If @check_resume is set and there's a resume request pending when
* __pm_runtime_disable() is called and power.disable_depth is zero, the
- * function will wake up the device before disabling its run-time PM.
+ * function will wake up the device before disabling its runtime PM.
*/
void __pm_runtime_disable(struct device *dev, bool check_resume)
{
@@ -987,7 +988,7 @@ void __pm_runtime_disable(struct device *dev, bool check_resume)
/*
* Wake up the device if there's a resume request pending, because that
- * means there probably is some I/O to process and disabling run-time PM
+ * means there probably is some I/O to process and disabling runtime PM
* shouldn't prevent the device from processing the I/O.
*/
if (check_resume && dev->power.request_pending
@@ -1012,7 +1013,7 @@ void __pm_runtime_disable(struct device *dev, bool check_resume)
EXPORT_SYMBOL_GPL(__pm_runtime_disable);
/**
- * pm_runtime_enable - Enable run-time PM of a device.
+ * pm_runtime_enable - Enable runtime PM of a device.
* @dev: Device to handle.
*/
void pm_runtime_enable(struct device *dev)
@@ -1031,7 +1032,7 @@ void pm_runtime_enable(struct device *dev)
EXPORT_SYMBOL_GPL(pm_runtime_enable);
/**
- * pm_runtime_forbid - Block run-time PM of a device.
+ * pm_runtime_forbid - Block runtime PM of a device.
* @dev: Device to handle.
*
* Increase the device's usage count and clear its power.runtime_auto flag,
@@ -1054,7 +1055,7 @@ void pm_runtime_forbid(struct device *dev)
EXPORT_SYMBOL_GPL(pm_runtime_forbid);
/**
- * pm_runtime_allow - Unblock run-time PM of a device.
+ * pm_runtime_allow - Unblock runtime PM of a device.
* @dev: Device to handle.
*
* Decrease the device's usage count and set its power.runtime_auto flag.
@@ -1075,12 +1076,12 @@ void pm_runtime_allow(struct device *dev)
EXPORT_SYMBOL_GPL(pm_runtime_allow);
/**
- * pm_runtime_no_callbacks - Ignore run-time PM callbacks for a device.
+ * pm_runtime_no_callbacks - Ignore runtime PM callbacks for a device.
* @dev: Device to handle.
*
* Set the power.no_callbacks flag, which tells the PM core that this
- * device is power-managed through its parent and has no run-time PM
- * callbacks of its own. The run-time sysfs attributes will be removed.
+ * device is power-managed through its parent and has no runtime PM
+ * callbacks of its own. The runtime sysfs attributes will be removed.
*/
void pm_runtime_no_callbacks(struct device *dev)
{
@@ -1156,8 +1157,8 @@ static void update_autosuspend(struct device *dev, int old_delay, int old_use)
* @delay: Value of the new delay in milliseconds.
*
* Set the device's power.autosuspend_delay value. If it changes to negative
- * and the power.use_autosuspend flag is set, prevent run-time suspends. If it
- * changes the other way, allow run-time suspends.
+ * and the power.use_autosuspend flag is set, prevent runtime suspends. If it
+ * changes the other way, allow runtime suspends.
*/
void pm_runtime_set_autosuspend_delay(struct device *dev, int delay)
{
@@ -1177,7 +1178,7 @@ EXPORT_SYMBOL_GPL(pm_runtime_set_autosuspend_delay);
* @dev: Device to handle.
* @use: New value for use_autosuspend.
*
- * Set the device's power.use_autosuspend flag, and allow or prevent run-time
+ * Set the device's power.use_autosuspend flag, and allow or prevent runtime
* suspends as needed.
*/
void __pm_runtime_use_autosuspend(struct device *dev, bool use)
@@ -1194,7 +1195,7 @@ void __pm_runtime_use_autosuspend(struct device *dev, bool use)
EXPORT_SYMBOL_GPL(__pm_runtime_use_autosuspend);
/**
- * pm_runtime_init - Initialize run-time PM fields in given device object.
+ * pm_runtime_init - Initialize runtime PM fields in given device object.
* @dev: Device object to initialize.
*/
void pm_runtime_init(struct device *dev)