1 files changed, 27 insertions, 17 deletions

diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 0992e67e862b..f80d298de3fa 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -17,6 +17,8 @@
  * subsystem list maintains.
  */
 
+#define pr_fmt(fmt) "PM: " fmt
+
 #include <linux/device.h>
 #include <linux/export.h>
 #include <linux/mutex.h>
@@ -124,7 +126,11 @@ void device_pm_unlock(void)
  */
 void device_pm_add(struct device *dev)
 {
-	pr_debug("PM: Adding info for %s:%s\n",
+	/* Skip PM setup/initialization. */
+	if (device_pm_not_required(dev))
+		return;
+
+	pr_debug("Adding info for %s:%s\n",
 		 dev->bus ? dev->bus->name : "No Bus", dev_name(dev));
 	device_pm_check_callbacks(dev);
 	mutex_lock(&dpm_list_mtx);
@@ -142,7 +148,10 @@ void device_pm_add(struct device *dev)
  */
 void device_pm_remove(struct device *dev)
 {
-	pr_debug("PM: Removing info for %s:%s\n",
+	if (device_pm_not_required(dev))
+		return;
+
+	pr_debug("Removing info for %s:%s\n",
 		 dev->bus ? dev->bus->name : "No Bus", dev_name(dev));
 	complete_all(&dev->power.completion);
 	mutex_lock(&dpm_list_mtx);
@@ -161,7 +170,7 @@ void device_pm_remove(struct device *dev)
  */
 void device_pm_move_before(struct device *deva, struct device *devb)
 {
-	pr_debug("PM: Moving %s:%s before %s:%s\n",
+	pr_debug("Moving %s:%s before %s:%s\n",
 		 deva->bus ? deva->bus->name : "No Bus", dev_name(deva),
 		 devb->bus ? devb->bus->name : "No Bus", dev_name(devb));
 	/* Delete deva from dpm_list and reinsert before devb. */
@@ -175,7 +184,7 @@ void device_pm_move_before(struct device *deva, struct device *devb)
  */
 void device_pm_move_after(struct device *deva, struct device *devb)
 {
-	pr_debug("PM: Moving %s:%s after %s:%s\n",
+	pr_debug("Moving %s:%s after %s:%s\n",
 		 deva->bus ? deva->bus->name : "No Bus", dev_name(deva),
 		 devb->bus ? devb->bus->name : "No Bus", dev_name(devb));
 	/* Delete deva from dpm_list and reinsert after devb. */
@@ -188,7 +197,7 @@ void device_pm_move_after(struct device *deva, struct device *devb)
  */
 void device_pm_move_last(struct device *dev)
 {
-	pr_debug("PM: Moving %s:%s to end of list\n",
+	pr_debug("Moving %s:%s to end of list\n",
 		 dev->bus ? dev->bus->name : "No Bus", dev_name(dev));
 	list_move_tail(&dev->power.entry, &dpm_list);
 }
@@ -411,8 +420,8 @@ static void pm_dev_dbg(struct device *dev, pm_message_t state, const char *info)
 static void pm_dev_err(struct device *dev, pm_message_t state, const char *info,
 			int error)
 {
-	printk(KERN_ERR "PM: Device %s failed to %s%s: error %d\n",
-		dev_name(dev), pm_verb(state.event), info, error);
+	pr_err("Device %s failed to %s%s: error %d\n",
+	       dev_name(dev), pm_verb(state.event), info, error);
 }
 
 static void dpm_show_time(ktime_t starttime, pm_message_t state, int error,
@@ -727,7 +736,7 @@ void dpm_noirq_resume_devices(pm_message_t state)
 		reinit_completion(&dev->power.completion);
 		if (is_async(dev)) {
 			get_device(dev);
-			async_schedule(async_resume_noirq, dev);
+			async_schedule_dev(async_resume_noirq, dev);
 		}
 	}
 
@@ -884,7 +893,7 @@ void dpm_resume_early(pm_message_t state)
 		reinit_completion(&dev->power.completion);
 		if (is_async(dev)) {
 			get_device(dev);
-			async_schedule(async_resume_early, dev);
+			async_schedule_dev(async_resume_early, dev);
 		}
 	}
 
@@ -1048,7 +1057,7 @@ void dpm_resume(pm_message_t state)
 		reinit_completion(&dev->power.completion);
 		if (is_async(dev)) {
 			get_device(dev);
-			async_schedule(async_resume, dev);
+			async_schedule_dev(async_resume, dev);
 		}
 	}
 
@@ -1368,7 +1377,7 @@ static int device_suspend_noirq(struct device *dev)
 
 	if (is_async(dev)) {
 		get_device(dev);
-		async_schedule(async_suspend_noirq, dev);
+		async_schedule_dev(async_suspend_noirq, dev);
 		return 0;
 	}
 	return __device_suspend_noirq(dev, pm_transition, false);
@@ -1571,7 +1580,7 @@ static int device_suspend_late(struct device *dev)
 
 	if (is_async(dev)) {
 		get_device(dev);
-		async_schedule(async_suspend_late, dev);
+		async_schedule_dev(async_suspend_late, dev);
 		return 0;
 	}
 
@@ -1741,8 +1750,10 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
 	if (dev->power.direct_complete) {
 		if (pm_runtime_status_suspended(dev)) {
 			pm_runtime_disable(dev);
-			if (pm_runtime_status_suspended(dev))
+			if (pm_runtime_status_suspended(dev)) {
+				pm_dev_dbg(dev, state, "direct-complete ");
 				goto Complete;
+			}
 
 			pm_runtime_enable(dev);
 		}
@@ -1835,7 +1846,7 @@ static int device_suspend(struct device *dev)
 
 	if (is_async(dev)) {
 		get_device(dev);
-		async_schedule(async_suspend, dev);
+		async_schedule_dev(async_suspend, dev);
 		return 0;
 	}
 
@@ -2013,8 +2024,7 @@ int dpm_prepare(pm_message_t state)
 				error = 0;
 				continue;
 			}
-			printk(KERN_INFO "PM: Device %s not prepared "
-				"for power transition: code %d\n",
+			pr_info("Device %s not prepared for power transition: code %d\n",
 				dev_name(dev), error);
 			put_device(dev);
 			break;
@@ -2053,7 +2063,7 @@ EXPORT_SYMBOL_GPL(dpm_suspend_start);
 void __suspend_report_result(const char *function, void *fn, int ret)
 {
 	if (ret)
-		printk(KERN_ERR "%s(): %pF returns %d\n", function, fn, ret);
+		pr_err("%s(): %pF returns %d\n", function, fn, ret);
 }
 EXPORT_SYMBOL_GPL(__suspend_report_result);