media: atomisp: ov2680: Error handling fixes

Fix 3 error handling issues:

1. In ov2680_s_stream(), when pm_runtime_get_sync() fails it will still
   have incremented the pm-runtime reference count so we need to call
   pm_runtime_put()

2. In ov2680_s_stream() sensor->is_streaming should always be set to false
   when the sensor is powered-off even on i2c-communication errors.

3. In ov2680_probe(), call ov2680_remove() on ov2680_s_config() errors,
   so that pm_runtime_disable() is properly called to disable the
   runtime-pm which has been enabled before the ov2680_s_config() call.
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/staging/media/atomisp/i2c/atomisp-ov2680.c

@@ -419,7 +419,7 @@ static int ov2680_s_stream(struct v4l2_subdev *sd, int enable)
 	if (enable) {
 		ret = pm_runtime_get_sync(sensor->sd.dev);
 		if (ret < 0)
-			goto error_unlock;
+			goto error_power_down;
 
 		ret = ov2680_set_mode(sensor);
 		if (ret)
@@ -447,6 +447,7 @@ static int ov2680_s_stream(struct v4l2_subdev *sd, int enable)
 
 error_power_down:
 	pm_runtime_put(sensor->sd.dev);
+	sensor->is_streaming = false;
 error_unlock:
 	mutex_unlock(&sensor->input_lock);
 	return ret;
@@ -644,8 +645,10 @@ static int ov2680_probe(struct i2c_client *client)
 	pm_runtime_use_autosuspend(dev);
 
 	ret = ov2680_s_config(&sensor->sd);
-	if (ret)
+	if (ret) {
+		ov2680_remove(client);
 		return ret;
+	}
 
 	sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 	sensor->pad.flags = MEDIA_PAD_FL_SOURCE;