[media] uvc: Add return code check at vb2_queue_init()

This function returns an integer and it's mandatory
to check the return code.

Signed-off-by: Ezequiel Garcia <[e-mail]>
Acked-by: Laurent Pinchart <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/usb/uvc/uvc_queue.c

···
 	.buf_finish = uvc_buffer_finish,
 };
 
-void uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
+int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type,
 		    int drop_corrupted)
 {
+	int ret;
+
 	queue->queue.type = type;
 	queue->queue.io_modes = VB2_MMAP | VB2_USERPTR;
 	queue->queue.drv_priv = queue;
 	queue->queue.buf_struct_size = sizeof(struct uvc_buffer);
 	queue->queue.ops = &uvc_queue_qops;
 	queue->queue.mem_ops = &vb2_vmalloc_memops;
-	vb2_queue_init(&queue->queue);
+	ret = vb2_queue_init(&queue->queue);
+	if (ret)
+		return ret;
 
 	mutex_init(&queue->mutex);
 	spin_lock_init(&queue->irqlock);
 	INIT_LIST_HEAD(&queue->irqqueue);
 	queue->flags = drop_corrupted ? UVC_QUEUE_DROP_CORRUPTED : 0;
+
+	return 0;
 }
 
 /* -----------------------------------------------------------------------------

drivers/media/usb/uvc/uvc_video.c

···
 	atomic_set(&stream->active, 0);
 
 	/* Initialize the video buffers queue. */
-	uvc_queue_init(&stream->queue, stream->type, !uvc_no_drop_param);
+	ret = uvc_queue_init(&stream->queue, stream->type, !uvc_no_drop_param);
+	if (ret)
+		return ret;
 
 	/* Alternate setting 0 should be the default, yet the XBox Live Vision
 	 * Cam (and possibly other devices) crash or otherwise misbehave if

drivers/media/usb/uvc/uvcvideo.h

···
 extern struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id);
 
 /* Video buffers queue management. */
-extern void uvc_queue_init(struct uvc_video_queue *queue,
+extern int uvc_queue_init(struct uvc_video_queue *queue,
 		enum v4l2_buf_type type, int drop_corrupted);
 extern int uvc_alloc_buffers(struct uvc_video_queue *queue,
 		struct v4l2_requestbuffers *rb);