[PATCH 8/8] media: uvcvideo: Do not create MC entities for virtual entities

[Ricardo Ribalda]

Neither the GPIO nor the FWNODE entities form part of the device
pipeline. We just create them to hold emulated uvc controls.

When the device initializes, a warning is thrown by the v4l2 core:
uvcvideo 1-1:1.0: Entity type for entity FWNODE was not initialized!

There are no entity function that matches what we are doing here, and
it does not make to much sense to create a function for entities that
do not really exist.

Do not create MC entities for them and pretend nothing happened here.

Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
---
 drivers/media/usb/uvc/uvc_entity.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/media/usb/uvc/uvc_entity.c b/drivers/media/usb/uvc/uvc_entity.c
index 01eeba2f049e9ebb25e091340a133656acbf28ca..4a0a083b4f58f041023710207a73e8fede8526e0 100644
--- a/drivers/media/usb/uvc/uvc_entity.c
+++ b/drivers/media/usb/uvc/uvc_entity.c
@@ -72,6 +72,16 @@ static int uvc_mc_init_entity(struct uvc_video_chain *chain,
 {
 	int ret;
 
+	/*
+	 * Do not initialize virtual entities, they do not really exist
+	 * and are not connected to any other entities.
+	 */
+	switch (UVC_ENTITY_TYPE(entity)) {
+	case UVC_EXT_GPIO_UNIT:
+	case UVC_FWNODE_UNIT:
+		return 0;
+	}
+
 	if (UVC_ENTITY_TYPE(entity) != UVC_TT_STREAMING) {
 		u32 function;
 

-- 
2.49.0.504.g3bcea36a83-goog