C++ (Cpp) media_entity_put 예제들

예제 #1

파일: v4l2-subdev.c 프로젝트: Yemege/kernel-zynq

static int subdev_open(struct file *file)
{
    struct video_device *vdev = video_devdata(file);
    struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
    struct v4l2_subdev_fh *subdev_fh;
#if defined(CONFIG_MEDIA_CONTROLLER)
    struct media_entity *entity = NULL;
#endif
    int ret;

    subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL);
    if (subdev_fh == NULL)
        return -ENOMEM;

    ret = subdev_fh_init(subdev_fh, sd);
    if (ret) {
        kfree(subdev_fh);
        return ret;
    }

    v4l2_fh_init(&subdev_fh->vfh, vdev);
    v4l2_fh_add(&subdev_fh->vfh);
    file->private_data = &subdev_fh->vfh;
#if defined(CONFIG_MEDIA_CONTROLLER)
    if (sd->v4l2_dev->mdev) {
        entity = media_entity_get(&sd->entity);
        if (!entity) {
            ret = -EBUSY;
            goto err;
        }
    }
#endif

    if (sd->internal_ops && sd->internal_ops->open) {
        ret = sd->internal_ops->open(sd, subdev_fh);
        if (ret < 0)
            goto err;
    }

    return 0;

err:
#if defined(CONFIG_MEDIA_CONTROLLER)
    if (entity)
        media_entity_put(entity);
#endif
    v4l2_fh_del(&subdev_fh->vfh);
    v4l2_fh_exit(&subdev_fh->vfh);
    subdev_fh_free(subdev_fh);
    kfree(subdev_fh);

    return ret;
}

예제 #2

파일: v4l2-subdev.c 프로젝트: jmw7912/wat-0016-kernel-2.6.37

static int subdev_close(struct file *file)
{
	struct video_device *vdev = video_devdata(file);
	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	struct v4l2_fh *vfh = file->private_data;
	struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh);

	v4l2_subdev_call(sd, file, close, subdev_fh);
#if defined(CONFIG_MEDIA_CONTROLLER)
	if (sd->v4l2_dev->mdev)
		media_entity_put(&sd->entity);
#endif
	v4l2_fh_del(vfh);
	v4l2_fh_exit(vfh);
	subdev_fh_free(subdev_fh);
	kfree(subdev_fh);
	file->private_data = NULL;

	return 0;
}

예제 #3

파일: v4l2-subdev.c 프로젝트: jmw7912/wat-0016-kernel-2.6.37

static int subdev_open(struct file *file)
{
	struct video_device *vdev = video_devdata(file);
	struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
	struct v4l2_subdev_fh *subdev_fh;
#if defined(CONFIG_MEDIA_CONTROLLER)
	struct media_entity *entity = NULL;
#endif
	int ret;

	if (!sd->initialized)
		return -EAGAIN;

	subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL);
	if (subdev_fh == NULL)
		return -ENOMEM;

	ret = subdev_fh_init(subdev_fh, sd);
	if (ret) {
		kfree(subdev_fh);
		return ret;
	}

	ret = v4l2_fh_init(&subdev_fh->vfh, vdev);
	if (ret)
		goto err;

	if (sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS) {
		ret = v4l2_event_init(&subdev_fh->vfh);
		if (ret)
			goto err;

		ret = v4l2_event_alloc(&subdev_fh->vfh, sd->nevents);
		if (ret)
			goto err;
	}

	v4l2_fh_add(&subdev_fh->vfh);
	file->private_data = &subdev_fh->vfh;
#if defined(CONFIG_MEDIA_CONTROLLER)
	if (sd->v4l2_dev->mdev) {
		entity = media_entity_get(&sd->entity);
		if (!entity) {
			ret = -EBUSY;
			goto err;
		}
	}
#endif

	ret = v4l2_subdev_call(sd, file, open, subdev_fh);
	if (ret < 0 && ret != -ENOIOCTLCMD)
		goto err;

	return 0;

err:
#if defined(CONFIG_MEDIA_CONTROLLER)
	if (entity)
		media_entity_put(entity);
#endif
	v4l2_fh_del(&subdev_fh->vfh);
	v4l2_fh_exit(&subdev_fh->vfh);
	subdev_fh_free(subdev_fh);
	kfree(subdev_fh);

	return ret;
}