diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index a9f5b8979611..942d6a7c9ae1 100644
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -116,12 +116,14 @@ static ssize_t control_store(struct device * dev, struct device_attribute *attr,
 	cp = memchr(buf, '\n', n);
 	if (cp)
 		len = cp - buf;
+	device_lock(dev);
 	if (len == sizeof ctrl_auto - 1 && strncmp(buf, ctrl_auto, len) == 0)
 		pm_runtime_allow(dev);
 	else if (len == sizeof ctrl_on - 1 && strncmp(buf, ctrl_on, len) == 0)
 		pm_runtime_forbid(dev);
 	else
-		return -EINVAL;
+		n = -EINVAL;
+	device_unlock(dev);
 	return n;
 }
 
@@ -205,7 +207,9 @@ static ssize_t autosuspend_delay_ms_store(struct device *dev,
 	if (strict_strtol(buf, 10, &delay) != 0 || delay != (int) delay)
 		return -EINVAL;
 
+	device_lock(dev);
 	pm_runtime_set_autosuspend_delay(dev, delay);
+	device_unlock(dev);
 	return n;
 }