media: i2c: ov5647: Drop check for reentrant .s_stream()

The subdev .s_stream() operation shall not be called to start streaming
on an already started subdev, or stop streaming on a stopped subdev.
Remove the check that guards against that condition.

The streaming field of the driver's private structure is now unused,
drop it as well.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/i2c/ov5647.c

@@ -109,7 +109,6 @@ struct ov5647 {
 	struct v4l2_ctrl		*hblank;
 	struct v4l2_ctrl		*vblank;
 	struct v4l2_ctrl		*exposure;
-	bool				streaming;
 };
 
 static inline struct ov5647 *to_sensor(struct v4l2_subdev *sd)
@@ -898,10 +897,6 @@ static int ov5647_s_stream(struct v4l2_subdev *sd, int enable)
 	int ret;
 
 	mutex_lock(&sensor->lock);
-	if (sensor->streaming == enable) {
-		mutex_unlock(&sensor->lock);
-		return 0;
-	}
 
 	if (enable) {
 		ret = pm_runtime_resume_and_get(&client->dev);
@@ -922,7 +917,6 @@ static int ov5647_s_stream(struct v4l2_subdev *sd, int enable)
 		pm_runtime_put(&client->dev);
 	}
 
-	sensor->streaming = enable;
 	mutex_unlock(&sensor->lock);
 
 	return 0;