media: i2c: mt9m001: use pm_runtime_resume_and_get()

Commit dd8088d5 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")
added pm_runtime_resume_and_get() in order to automatically handle
dev->power.usage_count decrement on errors.

Use the new API, in order to cleanup the error check logic.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/i2c/mt9m001.c

@@ -217,9 +217,9 @@ static int mt9m001_s_stream(struct v4l2_subdev *sd, int enable)
 		goto done;
 
 	if (enable) {
-		ret = pm_runtime_get_sync(&client->dev);
+		ret = pm_runtime_resume_and_get(&client->dev);
 		if (ret < 0)
-			goto put_unlock;
+			goto unlock;
 
 		ret = mt9m001_apply_selection(sd);
 		if (ret)
@@ -247,6 +247,7 @@ static int mt9m001_s_stream(struct v4l2_subdev *sd, int enable)
 
 put_unlock:
 	pm_runtime_put(&client->dev);
+unlock:
 	mutex_unlock(&mt9m001->mutex);
 
 	return ret;
@@ -834,6 +835,10 @@ static int mt9m001_remove(struct i2c_client *client)
 {
 	struct mt9m001 *mt9m001 = to_mt9m001(client);
 
+	/*
+	 * As it increments RPM usage_count even on errors, we don't need to
+	 * check the returned code here.
+	 */
 	pm_runtime_get_sync(&client->dev);
 
 	v4l2_async_unregister_subdev(&mt9m001->subdev);