Merge branch 'pm-assorted'

* pm-assorted:
  PM / QoS: Add pm_qos and dev_pm_qos to events-power.txt
  PM / QoS: Add dev_pm_qos_request tracepoints
  PM / QoS: Add pm_qos_request tracepoints
  PM / QoS: Add pm_qos_update_target/flags tracepoints
  PM / QoS: Update Documentation/power/pm_qos_interface.txt
  PM / Sleep: Print last wakeup source on failed wakeup_count write
  PM / QoS: correct the valid range of pm_qos_class
  PM / wakeup: Adjust messaging for wake events during suspend
  PM / Runtime: Update .runtime_idle() callback documentation
  PM / Runtime: Rework the "runtime idle" helper routine
  PM / Hibernate: print physical addresses consistently with other parts of kernel

33 files changed, 315 insertions, 113 deletions

diff --git a/Documentation/power/pm_qos_interface.txt b/Documentation/power/pm_qos_interface.txt
index 79a2a58425e..48363208778 100644
--- a/Documentation/power/pm_qos_interface.txt
+++ b/Documentation/power/pm_qos_interface.txt
@@ -7,7 +7,7 @@ one of the parameters.
 Two different PM QoS frameworks are available:
 1. PM QoS classes for cpu_dma_latency, network_latency, network_throughput.
 2. the per-device PM QoS framework provides the API to manage the per-device latency
-constraints.
+constraints and PM QoS flags.
 
 Each parameters have defined units:
  * latency: usec
@@ -86,13 +86,17 @@ To remove the user mode request for a target value simply close the device
 node.
 
 
-2. PM QoS per-device latency framework
+2. PM QoS per-device latency and flags framework
+
+For each device, there are two lists of PM QoS requests. One is maintained
+along with the aggregated target of latency value and the other is for PM QoS
+flags. Values are updated in response to changes of the request list.
+
+Target latency value is simply the minimum of the request values held in the
+parameter list elements.  The PM QoS flags aggregate value is a gather (bitwise
+OR) of all list elements' values. Two device PM QoS flags are defined currently:
+PM_QOS_FLAG_NO_POWER_OFF and PM_QOS_FLAG_REMOTE_WAKEUP.
 
-For each device a list of performance requests is maintained along with
-an aggregated target value.  The aggregated target value is updated with
-changes to the request list or elements of the list.  Typically the
-aggregated target value is simply the max or min of the request values held
-in the parameter list elements.
 Note: the aggregated target value is implemented as an atomic variable so that
 reading the aggregated value does not require any locking mechanism.
 
@@ -119,6 +123,38 @@ the request.
 s32 dev_pm_qos_read_value(device):
 Returns the aggregated value for a given device's constraints list.
 
+enum pm_qos_flags_status dev_pm_qos_flags(device, mask)
+Check PM QoS flags of the given device against the given mask of flags.
+The meaning of the return values is as follows:
+	PM_QOS_FLAGS_ALL: All flags from the mask are set
+	PM_QOS_FLAGS_SOME: Some flags from the mask are set
+	PM_QOS_FLAGS_NONE: No flags from the mask are set
+	PM_QOS_FLAGS_UNDEFINED: The device's PM QoS structure has not been
+			initialized or the list of requests is empty.
+
+int dev_pm_qos_add_ancestor_request(dev, handle, value)
+Add a PM QoS request for the first direct ancestor of the given device whose
+power.ignore_children flag is unset.
+
+int dev_pm_qos_expose_latency_limit(device, value)
+Add a request to the device's PM QoS list of latency constraints and create
+a sysfs attribute pm_qos_resume_latency_us under the device's power directory
+allowing user space to manipulate that request.
+
+void dev_pm_qos_hide_latency_limit(device)
+Drop the request added by dev_pm_qos_expose_latency_limit() from the device's
+PM QoS list of latency constraints and remove sysfs attribute pm_qos_resume_latency_us
+from the device's power directory.
+
+int dev_pm_qos_expose_flags(device, value)
+Add a request to the device's PM QoS list of flags and create sysfs attributes
+pm_qos_no_power_off and pm_qos_remote_wakeup under the device's power directory
+allowing user space to change these flags' value.
+
+void dev_pm_qos_hide_flags(device)
+Drop the request added by dev_pm_qos_expose_flags() from the device's PM QoS list
+of flags and remove sysfs attributes pm_qos_no_power_off and pm_qos_remote_wakeup
+under the device's power directory.
 
 Notification mechanisms:
 The per-device PM QoS framework has 2 different and distinct notification trees:
diff --git a/Documentation/power/runtime_pm.txt b/Documentation/power/runtime_pm.txt
index 6c9f5d9aa11..71d8fe4e75d 100644
--- a/Documentation/power/runtime_pm.txt
+++ b/Documentation/power/runtime_pm.txt
@@ -144,8 +144,12 @@ The action performed by the idle callback is totally dependent on the subsystem
 (or driver) in question, but the expected and recommended action is to check
 if the device can be suspended (i.e. if all of the conditions necessary for
 suspending the device are satisfied) and to queue up a suspend request for the
-device in that case.  The value returned by this callback is ignored by the PM
-core.
+device in that case.  If there is no idle callback, or if the callback returns
+0, then the PM core will attempt to carry out a runtime suspend of the device;
+in essence, it will call pm_runtime_suspend() directly.  To prevent this (for
+example, if the callback routine has started a delayed suspend), the routine
+should return a non-zero value.  Negative error return codes are ignored by the
+PM core.
 
 The helper functions provided by the PM core, described in Section 4, guarantee
 that the following constraints are met with respect to runtime PM callbacks for
@@ -301,9 +305,10 @@ drivers/base/power/runtime.c and include/linux/pm_runtime.h:
       removing the device from device hierarchy
 
   int pm_runtime_idle(struct device *dev);
-    - execute the subsystem-level idle callback for the device; returns 0 on
-      success or error code on failure, where -EINPROGRESS means that
-      ->runtime_idle() is already being executed
+    - execute the subsystem-level idle callback for the device; returns an
+      error code on failure, where -EINPROGRESS means that ->runtime_idle() is
+      already being executed; if there is no callback or the callback returns 0
+      then run pm_runtime_suspend(dev) and return its result
 
   int pm_runtime_suspend(struct device *dev);
     - execute the subsystem-level suspend callback for the device; returns 0 on
@@ -660,11 +665,6 @@ Subsystems may wish to conserve code space by using the set of generic power
 management callbacks provided by the PM core, defined in
 driver/base/power/generic_ops.c:
 
-  int pm_generic_runtime_idle(struct device *dev);
-    - invoke the ->runtime_idle() callback provided by the driver of this
-      device, if defined, and call pm_runtime_suspend() for this device if the
-      return value is 0 or the callback is not defined
-
   int pm_generic_runtime_suspend(struct device *dev);
     - invoke the ->runtime_suspend() callback provided by the driver of this
       device and return its result, or return -EINVAL if not defined
diff --git a/Documentation/trace/events-power.txt b/Documentation/trace/events-power.txt
index e1498ff8cf9..3bd33b8dc7c 100644
--- a/Documentation/trace/events-power.txt
+++ b/Documentation/trace/events-power.txt
@@ -63,3 +63,34 @@ power_domain_target	"%s state=%lu cpu_id=%lu"
 The first parameter gives the power domain name (e.g. "mpu_pwrdm").
 The second parameter is the power domain target state.
 
+4. PM QoS events
+================
+The PM QoS events are used for QoS add/update/remove request and for
+target/flags update.
+
+pm_qos_add_request                 "pm_qos_class=%s value=%d"
+pm_qos_update_request              "pm_qos_class=%s value=%d"
+pm_qos_remove_request              "pm_qos_class=%s value=%d"
+pm_qos_update_request_timeout      "pm_qos_class=%s value=%d, timeout_us=%ld"
+
+The first parameter gives the QoS class name (e.g. "CPU_DMA_LATENCY").
+The second parameter is value to be added/updated/removed.
+The third parameter is timeout value in usec.
+
+pm_qos_update_target               "action=%s prev_value=%d curr_value=%d"
+pm_qos_update_flags                "action=%s prev_value=0x%x curr_value=0x%x"
+
+The first parameter gives the QoS action name (e.g. "ADD_REQ").
+The second parameter is the previous QoS value.
+The third parameter is the current QoS value to update.
+
+And, there are also events used for device PM QoS add/update/remove request.
+
+dev_pm_qos_add_request             "device=%s type=%s new_value=%d"
+dev_pm_qos_update_request          "device=%s type=%s new_value=%d"
+dev_pm_qos_remove_request          "device=%s type=%s new_value=%d"
+
+The first parameter gives the device name which tries to add/update/remove
+QoS requests.
+The second parameter gives the request type (e.g. "DEV_PM_QOS_LATENCY").
+The third parameter is value to be added/updated/removed.
diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c
index e6d230700b2..e37feb2f05a 100644
--- a/arch/arm/mach-omap2/omap_device.c
+++ b/arch/arm/mach-omap2/omap_device.c
@@ -591,11 +591,6 @@ static int _od_runtime_suspend(struct device *dev)
 	return ret;
 }
 
-static int _od_runtime_idle(struct device *dev)
-{
-	return pm_generic_runtime_idle(dev);
-}
-
 static int _od_runtime_resume(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
@@ -653,7 +648,7 @@ static int _od_resume_noirq(struct device *dev)
 struct dev_pm_domain omap_device_pm_domain = {
 	.ops = {
 		SET_RUNTIME_PM_OPS(_od_runtime_suspend, _od_runtime_resume,
-				   _od_runtime_idle)
+				   NULL)
 		USE_PLATFORM_PM_SLEEP_OPS
 		.suspend_noirq = _od_suspend_noirq,
 		.resume_noirq = _od_resume_noirq,
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 5f3597b87f2..67624d4d5ae 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -933,7 +933,6 @@ static struct dev_pm_domain acpi_general_pm_domain = {
 #ifdef CONFIG_PM_RUNTIME
 		.runtime_suspend = acpi_subsys_runtime_suspend,
 		.runtime_resume = acpi_subsys_runtime_resume,
-		.runtime_idle = pm_generic_runtime_idle,
 #endif
 #ifdef CONFIG_PM_SLEEP
 		.prepare = acpi_subsys_prepare,
diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c
index cdbad3a454a..c6707278a6b 100644
--- a/drivers/amba/bus.c
+++ b/drivers/amba/bus.c
@@ -284,7 +284,7 @@ static const struct dev_pm_ops amba_pm = {
 	SET_RUNTIME_PM_OPS(
 		amba_pm_runtime_suspend,
 		amba_pm_runtime_resume,
-		pm_generic_runtime_idle
+		NULL
 	)
 };
 
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index adf002a3c58..6e458a40a93 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5436,7 +5436,7 @@ static int ata_port_runtime_idle(struct device *dev)
 				return -EBUSY;
 	}
 
-	return pm_runtime_suspend(dev);
+	return 0;
 }
 
 static int ata_port_runtime_suspend(struct device *dev)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 9eda84246ff..96a930387eb 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -888,7 +888,6 @@ int platform_pm_restore(struct device *dev)
 static const struct dev_pm_ops platform_dev_pm_ops = {
 	.runtime_suspend = pm_generic_runtime_suspend,
 	.runtime_resume = pm_generic_runtime_resume,
-	.runtime_idle = pm_generic_runtime_idle,
 	USE_PLATFORM_PM_SLEEP_OPS
 };
 
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 7072404c8b6..bfb8955c406 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -2143,7 +2143,6 @@ void pm_genpd_init(struct generic_pm_domain *genpd,
 	genpd->max_off_time_changed = true;
 	genpd->domain.ops.runtime_suspend = pm_genpd_runtime_suspend;
 	genpd->domain.ops.runtime_resume = pm_genpd_runtime_resume;
-	genpd->domain.ops.runtime_idle = pm_generic_runtime_idle;
 	genpd->domain.ops.prepare = pm_genpd_prepare;
 	genpd->domain.ops.suspend = pm_genpd_suspend;
 	genpd->domain.ops.suspend_late = pm_genpd_suspend_late;
diff --git a/drivers/base/power/generic_ops.c b/drivers/base/power/generic_ops.c
index bfd898b8988..5ee030a864f 100644
--- a/drivers/base/power/generic_ops.c
+++ b/drivers/base/power/generic_ops.c
@@ -12,29 +12,6 @@
 
 #ifdef CONFIG_PM_RUNTIME
 /**
- * pm_generic_runtime_idle - Generic runtime idle callback for subsystems.
- * @dev: Device to handle.
- *
- * If PM operations are defined for the @dev's driver and they include
- * ->runtime_idle(), execute it and return its error code, if nonzero.
- * Otherwise, execute pm_runtime_suspend() for the device and return 0.
- */
-int pm_generic_runtime_idle(struct device *dev)
-{
-	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
-
-	if (pm && pm->runtime_idle) {
-		int ret = pm->runtime_idle(dev);
-		if (ret)
-			return ret;
-	}
-
-	pm_runtime_suspend(dev);
-	return 0;
-}
-EXPORT_SYMBOL_GPL(pm_generic_runtime_idle);
-
-/**
  * pm_generic_runtime_suspend - Generic runtime suspend callback for subsystems.
  * @dev: Device to suspend.
  *
diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c
index 71671c42ef4..5c1361a9e5d 100644
--- a/drivers/base/power/qos.c
+++ b/drivers/base/power/qos.c
@@ -42,6 +42,7 @@
 #include <linux/export.h>
 #include <linux/pm_runtime.h>
 #include <linux/err.h>
+#include <trace/events/power.h>
 
 #include "power.h"
 
@@ -305,6 +306,7 @@ int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req,
 	else if (!dev->power.qos)
 		ret = dev_pm_qos_constraints_allocate(dev);
 
+	trace_dev_pm_qos_add_request(dev_name(dev), type, value);
 	if (!ret) {
 		req->dev = dev;
 		req->type = type;
@@ -349,6 +351,8 @@ static int __dev_pm_qos_update_request(struct dev_pm_qos_request *req,
 		return -EINVAL;
 	}
 
+	trace_dev_pm_qos_update_request(dev_name(req->dev), req->type,
+					new_value);
 	if (curr_value != new_value)
 		ret = apply_constraint(req, PM_QOS_UPDATE_REQ, new_value);
 
@@ -398,6 +402,8 @@ static int __dev_pm_qos_remove_request(struct dev_pm_qos_request *req)
 	if (IS_ERR_OR_NULL(req->dev->power.qos))
 		return -ENODEV;
 
+	trace_dev_pm_qos_remove_request(dev_name(req->dev), req->type,
+					PM_QOS_DEFAULT_VALUE);
 	ret = apply_constraint(req, PM_QOS_REMOVE_REQ, PM_QOS_DEFAULT_VALUE);
 	memset(req, 0, sizeof(*req));
 	return ret;
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index ef13ad08afb..268a3509757 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -293,11 +293,8 @@ static int rpm_idle(struct device *dev, int rpmflags)
 	/* Pending requests need to be canceled. */
 	dev->power.request = RPM_REQ_NONE;
 
-	if (dev->power.no_callbacks) {
-		/* Assume ->runtime_idle() callback would have suspended. */
-		retval = rpm_suspend(dev, rpmflags);
+	if (dev->power.no_callbacks)
 		goto out;
-	}
 
 	/* Carry out an asynchronous or a synchronous idle notification. */
 	if (rpmflags & RPM_ASYNC) {
@@ -306,7 +303,8 @@ static int rpm_idle(struct device *dev, int rpmflags)
 			dev->power.request_pending = true;
 			queue_work(pm_wq, &dev->power.work);
 		}
-		goto out;
+		trace_rpm_return_int(dev, _THIS_IP_, 0);
+		return 0;
 	}
 
 	dev->power.idle_notification = true;
@@ -326,14 +324,14 @@ static int rpm_idle(struct device *dev, int rpmflags)
 		callback = dev->driver->pm->runtime_idle;
 
 	if (callback)
-		__rpm_callback(callback, dev);
+		retval = __rpm_callback(callback, dev);
 
 	dev->power.idle_notification = false;
 	wake_up_all(&dev->power.wait_queue);
 
  out:
 	trace_rpm_return_int(dev, _THIS_IP_, retval);
-	return retval;
+	return retval ? retval : rpm_suspend(dev, rpmflags);
 }
 
 /**
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index 79715e7fa43..2d56f4113ae 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -659,7 +659,7 @@ void pm_wakeup_event(struct device *dev, unsigned int msec)
 }
 EXPORT_SYMBOL_GPL(pm_wakeup_event);
 
-static void print_active_wakeup_sources(void)
+void pm_print_active_wakeup_sources(void)
 {
 	struct wakeup_source *ws;
 	int active = 0;
@@ -683,6 +683,7 @@ static void print_active_wakeup_sources(void)
 			last_activity_ws->name);
 	rcu_read_unlock();
 }
+EXPORT_SYMBOL_GPL(pm_print_active_wakeup_sources);
 
 /**
  * pm_wakeup_pending - Check if power transition in progress should be aborted.
@@ -707,8 +708,10 @@ bool pm_wakeup_pending(void)
 	}
 	spin_unlock_irqrestore(&events_lock, flags);
 
-	if (ret)
-		print_active_wakeup_sources();
+	if (ret) {
+		pr_info("PM: Wakeup pending, aborting suspend\n");
+		pm_print_active_wakeup_sources();
+	}
 
 	return ret;
 }
diff --git a/drivers/dma/intel_mid_dma.c b/drivers/dma/intel_mid_dma.c
index a0de82e21a7..a975ebebea8 100644
--- a/drivers/dma/intel_mid_dma.c
+++ b/drivers/dma/intel_mid_dma.c
@@ -1405,7 +1405,7 @@ static int dma_runtime_idle(struct device *dev)
 			return -EAGAIN;
 	}
 
-	return pm_schedule_suspend(dev, 0);
+	return 0;
 }
 
 /******************************************************************************
diff --git a/drivers/gpio/gpio-langwell.c b/drivers/gpio/gpio-langwell.c
index 62ef10a641c..89d0d2a3b1b 100644
--- a/drivers/gpio/gpio-langwell.c
+++ b/drivers/gpio/gpio-langwell.c
@@ -305,11 +305,7 @@ static const struct irq_domain_ops lnw_gpio_irq_ops = {
 
 static int lnw_gpio_runtime_idle(struct device *dev)
 {
-	int err = pm_schedule_suspend(dev, 500);
-
-	if (!err)
-		return 0;
-
+	pm_schedule_suspend(dev, 500);
 	return -EBUSY;
 }
 
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 48e31ed69db..f32ca293ae0 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -435,7 +435,7 @@ static const struct dev_pm_ops i2c_device_pm_ops = {
 	SET_RUNTIME_PM_OPS(
 		pm_generic_runtime_suspend,
 		pm_generic_runtime_resume,
-		pm_generic_runtime_idle
+		NULL
 	)
 };
 
diff --git a/drivers/mfd/ab8500-gpadc.c b/drivers/mfd/ab8500-gpadc.c
index 13f7866de46..3598b0ecf8c 100644
--- a/drivers/mfd/ab8500-gpadc.c
+++ b/drivers/mfd/ab8500-gpadc.c
@@ -886,12 +886,6 @@ static int ab8500_gpadc_runtime_resume(struct device *dev)
 	return ret;
 }
 
-static int ab8500_gpadc_runtime_idle(struct device *dev)
-{
-	pm_runtime_suspend(dev);
-	return 0;
-}
-
 static int ab8500_gpadc_suspend(struct device *dev)
 {
 	struct ab8500_gpadc *gpadc = dev_get_drvdata(dev);
@@ -1039,7 +1033,7 @@ static int ab8500_gpadc_remove(struct platform_device *pdev)
 static const struct dev_pm_ops ab8500_gpadc_pm_ops = {
 	SET_RUNTIME_PM_OPS(ab8500_gpadc_runtime_suspend,
 			   ab8500_gpadc_runtime_resume,
-			   ab8500_gpadc_runtime_idle)
+			   NULL)
 	SET_SYSTEM_SLEEP_PM_OPS(ab8500_gpadc_suspend,
 				ab8500_gpadc_resume)
 
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index e219c97a02a..9d5c7112557 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -164,7 +164,7 @@ static int mmc_runtime_resume(struct device *dev)
 
 static int mmc_runtime_idle(struct device *dev)
 {
-	return pm_runtime_suspend(dev);
+	return 0;
 }
 
 #endif /* !CONFIG_PM_RUNTIME */
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index 546c67c2bbb..6d67492a924 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -211,7 +211,7 @@ static const struct dev_pm_ops sdio_bus_pm_ops = {
 	SET_RUNTIME_PM_OPS(
 		pm_generic_runtime_suspend,
 		pm_generic_runtime_resume,
-		pm_generic_runtime_idle
+		NULL
 	)
 };
 
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 79277fb36c6..e6515e21afa 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -1050,26 +1050,22 @@ static int pci_pm_runtime_idle(struct device *dev)
 {
 	struct pci_dev *pci_dev = to_pci_dev(dev);
 	const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
+	int ret = 0;
 
 	/*
 	 * If pci_dev->driver is not set (unbound), the device should
 	 * always remain in D0 regardless of the runtime PM status
 	 */
 	if (!pci_dev->driver)
-		goto out;
+		return 0;
 
 	if (!pm)
 		return -ENOSYS;
 
-	if (pm->runtime_idle) {
-		int ret = pm->runtime_idle(dev);
-		if (ret)
-			return ret;
-	}
+	if (pm->runtime_idle)
+		ret = pm->runtime_idle(dev);
 
-out:
-	pm_runtime_suspend(dev);
-	return 0;
+	return ret;
 }
 
 #else /* !CONFIG_PM_RUNTIME */
diff --git a/drivers/scsi/scsi_pm.c b/drivers/scsi/scsi_pm.c
index 42539ee2cb1..4c5aabe2175 100644
--- a/drivers/scsi/scsi_pm.c
+++ b/drivers/scsi/scsi_pm.c
@@ -229,8 +229,6 @@ static int scsi_runtime_resume(struct device *dev)
 
 static int scsi_runtime_idle(struct device *dev)
 {
-	int err;
-
 	dev_dbg(dev, "scsi_runtime_idle\n");
 
 	/* Insert hooks here for targets, hosts, and transport classes */
@@ -240,14 +238,11 @@ static int scsi_runtime_idle(struct device *dev)
 
 		if (sdev->request_queue->dev) {
 			pm_runtime_mark_last_busy(dev);
-			err = pm_runtime_autosuspend(dev);
-		} else {
-			err = pm_runtime_suspend(dev);
+			pm_runtime_autosuspend(dev);
+			return -EBUSY;
 		}
-	} else {
-		err = pm_runtime_suspend(dev);
 	}
-	return err;
+	return 0;
 }
 
 int scsi_autopm_get_device(struct scsi_device *sdev)
diff --git a/drivers/sh/pm_runtime.c b/drivers/sh/pm_runtime.c
index afe9282629b..8afa5a4589f 100644
--- a/drivers/sh/pm_runtime.c
+++ b/drivers/sh/pm_runtime.c
@@ -25,7 +25,7 @@
 static int default_platform_runtime_idle(struct device *dev)
 {
 	/* suspend synchronously to disable clocks immediately */
-	return pm_runtime_suspend(dev);
+	return 0;
 }
 
 static struct dev_pm_domain default_pm_domain = {
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 32b7bb111eb..095cfaded1c 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -223,7 +223,7 @@ static const struct dev_pm_ops spi_pm = {
 	SET_RUNTIME_PM_OPS(
 		pm_generic_runtime_suspend,
 		pm_generic_runtime_resume,
-		pm_generic_runtime_idle
+		NULL
 	)
 };
 
diff --git a/drivers/tty/serial/mfd.c b/drivers/tty/serial/mfd.c
index 5f4765a7a5c..5dfcf3bae23 100644
--- a/drivers/tty/serial/mfd.c
+++ b/drivers/tty/serial/mfd.c
@@ -1248,13 +1248,8 @@ static int serial_hsu_resume(struct pci_dev *pdev)
 #ifdef CONFIG_PM_RUNTIME
 static int serial_hsu_runtime_idle(struct device *dev)
 {
-	int err;
-
-	err = pm_schedule_suspend(dev, 500);
-	if (err)
-		return -EBUSY;
-
-	return 0;
+	pm_schedule_suspend(dev, 500);
+	return -EBUSY;
 }
 
 static int serial_hsu_runtime_suspend(struct device *dev)
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 6eab440e154..7609ac4aed1 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -1765,7 +1765,8 @@ int usb_runtime_idle(struct device *dev)
 	 */
 	if (autosuspend_check(udev) == 0)
 		pm_runtime_autosuspend(dev);
-	return 0;
+	/* Tell the core not to suspend it, though. */
+	return -EBUSY;
 }
 
 int usb_set_usb2_hardware_lpm(struct usb_device *udev, int enable)
diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c
index b8bad294eeb..8c1b2c50946 100644
--- a/drivers/usb/core/port.c
+++ b/drivers/usb/core/port.c
@@ -141,7 +141,6 @@ static const struct dev_pm_ops usb_port_pm_ops = {
 #ifdef CONFIG_PM_RUNTIME
 	.runtime_suspend =	usb_port_runtime_suspend,
 	.runtime_resume =	usb_port_runtime_resume,
-	.runtime_idle =		pm_generic_runtime_idle,
 #endif
 };
 
diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
index 7d7e09efff9..6fa7cea25da 100644
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -37,7 +37,6 @@ extern void pm_runtime_enable(struct device *dev);
 extern void __pm_runtime_disable(struct device *dev, bool check_resume);
 extern void pm_runtime_allow(struct device *dev);
 extern void pm_runtime_forbid(struct device *dev);
-extern int pm_generic_runtime_idle(struct device *dev);
 extern int pm_generic_runtime_suspend(struct device *dev);
 extern int pm_generic_runtime_resume(struct device *dev);
 extern void pm_runtime_no_callbacks(struct device *dev);
@@ -143,7 +142,6 @@ static inline bool pm_runtime_active(struct device *dev) { return true; }
 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
 static inline bool pm_runtime_enabled(struct device *dev) { return false; }
 
-static inline int pm_generic_runtime_idle(struct device *dev) { return 0; }
 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; }
 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; }
 static inline void pm_runtime_no_callbacks(struct device *dev) {}
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index d4e3f16d5e8..f73cabf5901 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -363,6 +363,7 @@ extern bool pm_wakeup_pending(void);
 extern bool pm_get_wakeup_count(unsigned int *count, bool block);
 extern bool pm_save_wakeup_count(unsigned int count);
 extern void pm_wakep_autosleep_enabled(bool set);
+extern void pm_print_active_wakeup_sources(void);
 
 static inline void lock_system_sleep(void)
 {
diff --git a/include/trace/events/power.h b/include/trace/events/power.h
index 427acab5d69..8e42410bd15 100644
--- a/include/trace/events/power.h
+++ b/include/trace/events/power.h
@@ -5,6 +5,7 @@
 #define _TRACE_POWER_H
 
 #include <linux/ktime.h>
+#include <linux/pm_qos.h>
 #include <linux/tracepoint.h>
 
 DECLARE_EVENT_CLASS(cpu,
@@ -177,6 +178,178 @@ DEFINE_EVENT(power_domain, power_domain_target,
 
 	TP_ARGS(name, state, cpu_id)
 );
+
+/*
+ * The pm qos events are used for pm qos update
+ */
+DECLARE_EVENT_CLASS(pm_qos_request,
+
+	TP_PROTO(int pm_qos_class, s32 value),
+
+	TP_ARGS(pm_qos_class, value),
+
+	TP_STRUCT__entry(
+		__field( int,                    pm_qos_class   )
+		__field( s32,                    value          )
+	),
+
+	TP_fast_assign(
+		__entry->pm_qos_class = pm_qos_class;
+		__entry->value = value;
+	),
+
+	TP_printk("pm_qos_class=%s value=%d",
+		  __print_symbolic(__entry->pm_qos_class,
+			{ PM_QOS_CPU_DMA_LATENCY,	"CPU_DMA_LATENCY" },
+			{ PM_QOS_NETWORK_LATENCY,	"NETWORK_LATENCY" },
+			{ PM_QOS_NETWORK_THROUGHPUT,	"NETWORK_THROUGHPUT" }),
+		  __entry->value)
+);
+
+DEFINE_EVENT(pm_qos_request, pm_qos_add_request,
+
+	TP_PROTO(int pm_qos_class, s32 value),
+
+	TP_ARGS(pm_qos_class, value)
+);
+
+DEFINE_EVENT(pm_qos_request, pm_qos_update_request,
+
+	TP_PROTO(int pm_qos_class, s32 value),
+
+	TP_ARGS(pm_qos_class, value)
+);
+
+DEFINE_EVENT(pm_qos_request, pm_qos_remove_request,
+
+	TP_PROTO(int pm_qos_class, s32 value),
+
+	TP_ARGS(pm_qos_class, value)
+);
+
+TRACE_EVENT(pm_qos_update_request_timeout,
+
+	TP_PROTO(int pm_qos_class, s32 value, unsigned long timeout_us),
+
+	TP_ARGS(pm_qos_class, value, timeout_us),
+
+	TP_STRUCT__entry(
+		__field( int,                    pm_qos_class   )
+		__field( s32,                    value          )
+		__field( unsigned long,          timeout_us     )
+	),
+
+	TP_fast_assign(
+		__entry->pm_qos_class = pm_qos_class;
+		__entry->value = value;
+		__entry->timeout_us = timeout_us;
+	),
+
+	TP_printk("pm_qos_class=%s value=%d, timeout_us=%ld",
+		  __print_symbolic(__entry->pm_qos_class,
+			{ PM_QOS_CPU_DMA_LATENCY,	"CPU_DMA_LATENCY" },
+			{ PM_QOS_NETWORK_LATENCY,	"NETWORK_LATENCY" },
+			{ PM_QOS_NETWORK_THROUGHPUT,	"NETWORK_THROUGHPUT" }),
+		  __entry->value, __entry->timeout_us)
+);
+
+DECLARE_EVENT_CLASS(pm_qos_update,
+
+	TP_PROTO(enum pm_qos_req_action action, int prev_value, int curr_value),
+
+	TP_ARGS(action, prev_value, curr_value),
+
+	TP_STRUCT__entry(
+		__field( enum pm_qos_req_action, action         )
+		__field( int,                    prev_value     )
+		__field( int,                    curr_value     )
+	),
+
+	TP_fast_assign(
+		__entry->action = action;
+		__entry->prev_value = prev_value;
+		__entry->curr_value = curr_value;
+	),
+
+	TP_printk("action=%s prev_value=%d curr_value=%d",
+		  __print_symbolic(__entry->action,
+			{ PM_QOS_ADD_REQ,	"ADD_REQ" },
+			{ PM_QOS_UPDATE_REQ,	"UPDATE_REQ" },
+			{ PM_QOS_REMOVE_REQ,	"REMOVE_REQ" }),
+		  __entry->prev_value, __entry->curr_value)
+);
+
+DEFINE_EVENT(pm_qos_update, pm_qos_update_target,
+
+	TP_PROTO(enum pm_qos_req_action action, int prev_value, int curr_value),
+
+	TP_ARGS(action, prev_value, curr_value)
+);
+
+DEFINE_EVENT_PRINT(pm_qos_update, pm_qos_update_flags,
+
+	TP_PROTO(enum pm_qos_req_action action, int prev_value, int curr_value),
+
+	TP_ARGS(action, prev_value, curr_value),
+
+	TP_printk("action=%s prev_value=0x%x curr_value=0x%x",
+		  __print_symbolic(__entry->action,
+			{ PM_QOS_ADD_REQ,	"ADD_REQ" },
+			{ PM_QOS_UPDATE_REQ,	"UPDATE_REQ" },
+			{ PM_QOS_REMOVE_REQ,	"REMOVE_REQ" }),
+		  __entry->prev_value, __entry->curr_value)
+);
+
+DECLARE_EVENT_CLASS(dev_pm_qos_request,
+
+	TP_PROTO(const char *name, enum dev_pm_qos_req_type type,
+		 s32 new_value),
+
+	TP_ARGS(name, type, new_value),
+
+	TP_STRUCT__entry(
+		__string( name,                    name         )
+		__field( enum dev_pm_qos_req_type, type         )
+		__field( s32,                      new_value    )
+	),
+
+	TP_fast_assign(
+		__assign_str(name, name);
+		__entry->type = type;
+		__entry->new_value = new_value;
+	),
+
+	TP_printk("device=%s type=%s new_value=%d",
+		  __get_str(name),
+		  __print_symbolic(__entry->type,
+			{ DEV_PM_QOS_LATENCY,	"DEV_PM_QOS_LATENCY" },
+			{ DEV_PM_QOS_FLAGS,	"DEV_PM_QOS_FLAGS" }),
+		  __entry->new_value)
+);
+
+DEFINE_EVENT(dev_pm_qos_request, dev_pm_qos_add_request,
+
+	TP_PROTO(const char *name, enum dev_pm_qos_req_type type,
+		 s32 new_value),
+
+	TP_ARGS(name, type, new_value)
+);
+
+DEFINE_EVENT(dev_pm_qos_request, dev_pm_qos_update_request,
+
+	TP_PROTO(const char *name, enum dev_pm_qos_req_type type,
+		 s32 new_value),
+
+	TP_ARGS(name, type, new_value)
+);
+
+DEFINE_EVENT(dev_pm_qos_request, dev_pm_qos_remove_request,
+
+	TP_PROTO(const char *name, enum dev_pm_qos_req_type type,
+		 s32 new_value),
+
+	TP_ARGS(name, type, new_value)
+);
 #endif /* _TRACE_POWER_H */
 
 /* This part must be outside protection */
diff --git a/kernel/power/main.c b/kernel/power/main.c
index d77663bfede..0828070d38b 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -424,6 +424,8 @@ static ssize_t wakeup_count_store(struct kobject *kobj,
 	if (sscanf(buf, "%u", &val) == 1) {
 		if (pm_save_wakeup_count(val))
 			error = n;
+		else
+			pm_print_active_wakeup_sources();
 	}
 
  out:
diff --git a/kernel/power/qos.c b/kernel/power/qos.c
index 587dddeebf1..06fe28589e9 100644
--- a/kernel/power/qos.c
+++ b/kernel/power/qos.c
@@ -44,6 +44,7 @@
 
 #include <linux/uaccess.h>
 #include <linux/export.h>
+#include <trace/events/power.h>
 
 /*
  * locking rule: all changes to constraints or notifiers lists
@@ -202,6 +203,7 @@ int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
 
 	spin_unlock_irqrestore(&pm_qos_lock, flags);
 
+	trace_pm_qos_update_target(action, prev_value, curr_value);
 	if (prev_value != curr_value) {
 		blocking_notifier_call_chain(c->notifiers,
 					     (unsigned long)curr_value,
@@ -272,6 +274,7 @@ bool pm_qos_update_flags(struct pm_qos_flags *pqf,
 
 	spin_unlock_irqrestore(&pm_qos_lock, irqflags);
 
+	trace_pm_qos_update_flags(action, prev_value, curr_value);
 	return prev_value != curr_value;
 }
 
@@ -333,6 +336,7 @@ void pm_qos_add_request(struct pm_qos_request *req,
 	}
 	req->pm_qos_class = pm_qos_class;
 	INIT_DELAYED_WORK(&req->work, pm_qos_work_fn);
+	trace_pm_qos_add_request(pm_qos_class, value);
 	pm_qos_update_target(pm_qos_array[pm_qos_class]->constraints,
 			     &req->node, PM_QOS_ADD_REQ, value);
 }
@@ -361,6 +365,7 @@ void pm_qos_update_request(struct pm_qos_request *req,
 
 	cancel_delayed_work_sync(&req->work);
 
+	trace_pm_qos_update_request(req->pm_qos_class, new_value);
 	if (new_value != req->node.prio)
 		pm_qos_update_target(
 			pm_qos_array[req->pm_qos_class]->constraints,
@@ -387,6 +392,8 @@ void pm_qos_update_request_timeout(struct pm_qos_request *req, s32 new_value,
 
 	cancel_delayed_work_sync(&req->work);
 
+	trace_pm_qos_update_request_timeout(req->pm_qos_class,
+					    new_value, timeout_us);
 	if (new_value != req->node.prio)
 		pm_qos_update_target(
 			pm_qos_array[req->pm_qos_class]->constraints,
@@ -416,6 +423,7 @@ void pm_qos_remove_request(struct pm_qos_request *req)
 
 	cancel_delayed_work_sync(&req->work);
 
+	trace_pm_qos_remove_request(req->pm_qos_class, PM_QOS_DEFAULT_VALUE);
 	pm_qos_update_target(pm_qos_array[req->pm_qos_class]->constraints,
 			     &req->node, PM_QOS_REMOVE_REQ,
 			     PM_QOS_DEFAULT_VALUE);
@@ -477,7 +485,7 @@ static int find_pm_qos_object_by_minor(int minor)
 {
 	int pm_qos_class;
 
-	for (pm_qos_class = 0;
+	for (pm_qos_class = PM_QOS_CPU_DMA_LATENCY;
 		pm_qos_class < PM_QOS_NUM_CLASSES; pm_qos_class++) {
 		if (minor ==
 			pm_qos_array[pm_qos_class]->pm_qos_power_miscdev.minor)
@@ -491,7 +499,7 @@ static int pm_qos_power_open(struct inode *inode, struct file *filp)
 	long pm_qos_class;
 
 	pm_qos_class = find_pm_qos_object_by_minor(iminor(inode));
-	if (pm_qos_class >= 0) {
+	if (pm_qos_class >= PM_QOS_CPU_DMA_LATENCY) {
 		struct pm_qos_request *req = kzalloc(sizeof(*req), GFP_KERNEL);
 		if (!req)
 			return -ENOMEM;
@@ -584,7 +592,7 @@ static int __init pm_qos_power_init(void)
 
 	BUILD_BUG_ON(ARRAY_SIZE(pm_qos_array) != PM_QOS_NUM_CLASSES);
 
-	for (i = 1; i < PM_QOS_NUM_CLASSES; i++) {
+	for (i = PM_QOS_CPU_DMA_LATENCY; i < PM_QOS_NUM_CLASSES; i++) {
 		ret = register_pm_qos_misc(pm_qos_array[i]);
 		if (ret < 0) {
 			printk(KERN_ERR "pm_qos_param: %s setup failed\n",
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index 0de28576807..7872a35eafe 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -642,8 +642,9 @@ __register_nosave_region(unsigned long start_pfn, unsigned long end_pfn,
 	region->end_pfn = end_pfn;
 	list_add_tail(&region->list, &nosave_regions);
  Report:
-	printk(KERN_INFO "PM: Registered nosave memory: %016lx - %016lx\n",
-		start_pfn << PAGE_SHIFT, end_pfn << PAGE_SHIFT);
+	printk(KERN_INFO "PM: Registered nosave memory: [mem %#010llx-%#010llx]\n",
+		(unsigned long long) start_pfn << PAGE_SHIFT,
+		((unsigned long long) end_pfn << PAGE_SHIFT) - 1);
 }
 
 /*
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index bef86d121eb..ece04223bb1 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -269,7 +269,7 @@ int suspend_devices_and_enter(suspend_state_t state)
 	suspend_test_start();
 	error = dpm_suspend_start(PMSG_SUSPEND);
 	if (error) {
-		printk(KERN_ERR "PM: Some devices failed to suspend\n");
+		pr_err("PM: Some devices failed to suspend, or early wake event detected\n");
 		goto Recover_platform;
 	}
 	suspend_test_finish("suspend devices");