diff --git a/Documentation/driver-api/infrastructure.rst b/Documentation/driver-api/infrastructure.rst
index 0bb0b5fc951236f28c79d85a17f32e19710155da..6d9ff316b608db48b46de6413d9503e23b51536a 100644
--- a/Documentation/driver-api/infrastructure.rst
+++ b/Documentation/driver-api/infrastructure.rst
@@ -55,21 +55,6 @@ Device Drivers DMA Management
 .. kernel-doc:: drivers/base/dma-mapping.c
    :export:
 
-Device Drivers Power Management
--------------------------------
-
-.. kernel-doc:: drivers/base/power/main.c
-   :export:
-
-Device Drivers ACPI Support
----------------------------
-
-.. kernel-doc:: drivers/acpi/scan.c
-   :export:
-
-.. kernel-doc:: drivers/acpi/scan.c
-   :internal:
-
 Device drivers PnP support
 --------------------------
 
diff --git a/MAINTAINERS b/MAINTAINERS
index cfff2c9e3d9470550fd47dcd7b2638c77121c607..1a857698ac80502d71392173bf80d8714fe2ccf2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3800,6 +3800,7 @@ F:	include/linux/devcoredump.h
 DEVICE FREQUENCY (DEVFREQ)
 M:	MyungJoo Ham <myungjoo.ham@samsung.com>
 M:	Kyungmin Park <kyungmin.park@samsung.com>
+R:	Chanwoo Choi <cw00.choi@samsung.com>
 L:	linux-pm@vger.kernel.org
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/mzx/devfreq.git
 S:	Maintained
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index a5e1262b964b8f987480152cb5feb0dbc9d81e47..2997026b4dfb00c1daec88f1f18264656a61ffb0 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -626,6 +626,7 @@ static int genpd_runtime_resume(struct device *dev)
 
  out:
 	/* Measure resume latency. */
+	time_start = 0;
 	if (timed && runtime_pm)
 		time_start = ktime_get();
 
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index a324801d6a664cd707d70d673611cade4d43bd9d..47206a21bb901f424c4e331c9db6eaedef69d93d 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -593,11 +593,16 @@ struct devfreq *devfreq_add_device(struct device *dev,
 	list_add(&devfreq->node, &devfreq_list);
 
 	governor = find_devfreq_governor(devfreq->governor_name);
-	if (!IS_ERR(governor))
-		devfreq->governor = governor;
-	if (devfreq->governor)
-		err = devfreq->governor->event_handler(devfreq,
-					DEVFREQ_GOV_START, NULL);
+	if (IS_ERR(governor)) {
+		dev_err(dev, "%s: Unable to find governor for the device\n",
+			__func__);
+		err = PTR_ERR(governor);
+		goto err_init;
+	}
+
+	devfreq->governor = governor;
+	err = devfreq->governor->event_handler(devfreq, DEVFREQ_GOV_START,
+						NULL);
 	if (err) {
 		dev_err(dev, "%s: Unable to start governor for the device\n",
 			__func__);
diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
index a8ed7792ece2f199adaedd588b86375c49da6f17..9af86f46fbec0fc0779e4cf211c16227b804510d 100644
--- a/drivers/devfreq/exynos-bus.c
+++ b/drivers/devfreq/exynos-bus.c
@@ -497,7 +497,7 @@ static int exynos_bus_probe(struct platform_device *pdev)
 	if (IS_ERR(bus->devfreq)) {
 		dev_err(dev,
 			"failed to add devfreq dev with passive governor\n");
-		ret = -EPROBE_DEFER;
+		ret = PTR_ERR(bus->devfreq);
 		goto err;
 	}