media: entity: Add a nop variant of media_entity_cleanup

Add nop variant of media_entity_cleanup. This allows calling
media_entity_cleanup whether or not Media controller is enabled,
simplifying driver code.

Also drop #ifdefs on a few drivers around media_entity_cleanup().
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/i2c/mt9m111.c

@@ -1046,9 +1046,7 @@ static int mt9m111_remove(struct i2c_client *client)
 	struct mt9m111 *mt9m111 = to_mt9m111(client);
 
 	v4l2_async_unregister_subdev(&mt9m111->subdev);
-#ifdef CONFIG_MEDIA_CONTROLLER
 	media_entity_cleanup(&mt9m111->subdev.entity);
-#endif
 	v4l2_clk_put(mt9m111->clk);
 	v4l2_ctrl_handler_free(&mt9m111->hdl);
 

drivers/media/i2c/ov2640.c

@@ -1147,9 +1147,7 @@ static int ov2640_probe(struct i2c_client *client,
 	return 0;
 
 err_videoprobe:
-#if defined(CONFIG_MEDIA_CONTROLLER)
 	media_entity_cleanup(&priv->subdev.entity);
-#endif
 err_hdl:
 	v4l2_ctrl_handler_free(&priv->hdl);
 err_clk:
@@ -1163,9 +1161,7 @@ static int ov2640_remove(struct i2c_client *client)
 
 	v4l2_async_unregister_subdev(&priv->subdev);
 	v4l2_ctrl_handler_free(&priv->hdl);
-#if defined(CONFIG_MEDIA_CONTROLLER)
 	media_entity_cleanup(&priv->subdev.entity);
-#endif
 	v4l2_device_unregister_subdev(&priv->subdev);
 	clk_disable_unprepare(priv->clk);
 	return 0;

drivers/media/i2c/ov2659.c

@@ -1474,9 +1474,7 @@ static int ov2659_probe(struct i2c_client *client,
 
 error:
 	v4l2_ctrl_handler_free(&ov2659->ctrls);
-#if defined(CONFIG_MEDIA_CONTROLLER)
 	media_entity_cleanup(&sd->entity);
-#endif
 	mutex_destroy(&ov2659->lock);
 	return ret;
 }
@@ -1488,9 +1486,7 @@ static int ov2659_remove(struct i2c_client *client)
 
 	v4l2_ctrl_handler_free(&ov2659->ctrls);
 	v4l2_async_unregister_subdev(sd);
-#if defined(CONFIG_MEDIA_CONTROLLER)
 	media_entity_cleanup(&sd->entity);
-#endif
 	mutex_destroy(&ov2659->lock);
 
 	return 0;

drivers/media/i2c/ov7670.c

@@ -1846,9 +1846,7 @@ static int ov7670_probe(struct i2c_client *client,
 	return 0;
 
 entity_cleanup:
-#if defined(CONFIG_MEDIA_CONTROLLER)
 	media_entity_cleanup(&info->sd.entity);
-#endif
 hdl_free:
 	v4l2_ctrl_handler_free(&info->hdl);
 power_off:
@@ -1867,9 +1865,7 @@ static int ov7670_remove(struct i2c_client *client)
 	v4l2_async_unregister_subdev(sd);
 	v4l2_ctrl_handler_free(&info->hdl);
 	clk_disable_unprepare(info->clk);
-#if defined(CONFIG_MEDIA_CONTROLLER)
 	media_entity_cleanup(&info->sd.entity);
-#endif
 	ov7670_s_power(sd, 0);
 	return 0;
 }

drivers/media/i2c/ov7740.c

@@ -1148,9 +1148,7 @@ static int ov7740_remove(struct i2c_client *client)
 
 	mutex_destroy(&ov7740->mutex);
 	v4l2_ctrl_handler_free(ov7740->subdev.ctrl_handler);
-#if defined(CONFIG_MEDIA_CONTROLLER)
 	media_entity_cleanup(&ov7740->subdev.entity);
-#endif
 	v4l2_async_unregister_subdev(sd);
 	ov7740_free_controls(ov7740);
 

drivers/media/i2c/tvp514x.c

@@ -1131,9 +1131,7 @@ tvp514x_probe(struct i2c_client *client, const struct i2c_device_id *id)
 done:
 	if (ret < 0) {
 		v4l2_ctrl_handler_free(&decoder->hdl);
-#if defined(CONFIG_MEDIA_CONTROLLER)
 		media_entity_cleanup(&decoder->sd.entity);
-#endif
 	}
 	return ret;
 }
@@ -1151,9 +1149,7 @@ static int tvp514x_remove(struct i2c_client *client)
 	struct tvp514x_decoder *decoder = to_decoder(sd);
 
 	v4l2_async_unregister_subdev(&decoder->sd);
-#if defined(CONFIG_MEDIA_CONTROLLER)
 	media_entity_cleanup(&decoder->sd.entity);
-#endif
 	v4l2_ctrl_handler_free(&decoder->hdl);
 	return 0;
 }

include/media/media-entity.h

@@ -634,7 +634,11 @@ int media_entity_pads_init(struct media_entity *entity, u16 num_pads,
  * This function must be called during the cleanup phase after unregistering
  * the entity (currently, it does nothing).
  */
-static inline void media_entity_cleanup(struct media_entity *entity) {};
+#if IS_ENABLED(CONFIG_MEDIA_CONTROLLER)
+static inline void media_entity_cleanup(struct media_entity *entity) {}
+#else
+#define media_entity_cleanup(entity) do { } while (false)
+#endif
 
 /**
  * media_create_pad_link() - creates a link between two entities.