Hi Jacek,
One more comment on this one:
On Fri, Mar 20, 2015 at 04:03:27PM +0100, Jacek Anaszewski wrote:
...
> +struct v4l2_flash *v4l2_flash_init(struct led_classdev_flash *fled_cdev,
> + const struct v4l2_flash_ops *ops,
> + struct v4l2_flash_ctrl_config *config)
> +{
> + struct v4l2_flash *v4l2_flash;
> + struct led_classdev *led_cdev = &fled_cdev->led_cdev;
> + struct v4l2_subdev *sd;
> + int ret;
> +
> + if (!fled_cdev || !ops || !config)
> + return ERR_PTR(-EINVAL);
> +
> + v4l2_flash = devm_kzalloc(led_cdev->dev, sizeof(*v4l2_flash),
> + GFP_KERNEL);
> + if (!v4l2_flash)
> + return ERR_PTR(-ENOMEM);
> +
> + sd = &v4l2_flash->sd;
> + v4l2_flash->fled_cdev = fled_cdev;
> + v4l2_flash->ops = ops;
> + sd->dev = led_cdev->dev;
> + v4l2_subdev_init(sd, &v4l2_flash_subdev_ops);
> + sd->internal_ops = &v4l2_flash_subdev_internal_ops;
> + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
> + strlcpy(sd->name, config->dev_name, sizeof(sd->name));
> +
> + ret = media_entity_init(&sd->entity, 0, NULL, 0);
> + if (ret < 0)
> + return ERR_PTR(ret);
> +
> + sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV_FLASH;
> +
> + ret = v4l2_flash_init_controls(v4l2_flash, config);
> + if (ret < 0)
> + return ERR_PTR(ret);
> +
> + of_node_get(led_cdev->dev->of_node);
> +
> + ret = v4l2_async_register_subdev(sd);
> + if (ret < 0)
> + goto err_async_register_sd;
> +
> + return v4l2_flash;
> +
> +err_async_register_sd:
> + of_node_put(led_cdev->dev->of_node);
> + v4l2_ctrl_handler_free(sd->ctrl_handler);
> + media_entity_cleanup(&sd->entity);
> +
> + return ERR_PTR(ret);
> +}
> +EXPORT_SYMBOL_GPL(v4l2_flash_init);
> +
> +void v4l2_flash_release(struct v4l2_flash *v4l2_flash)
> +{
> + struct v4l2_subdev *sd = &v4l2_flash->sd;
> + struct led_classdev *led_cdev = &v4l2_flash->fled_cdev->led_cdev;
> +
> + v4l2_async_unregister_subdev(sd);
> + of_node_put(led_cdev->dev->of_node);
> + v4l2_ctrl_handler_free(sd->ctrl_handler);
> + media_entity_cleanup(&sd->entity);
> +}
> +EXPORT_SYMBOL_GPL(v4l2_flash_release);
It'd be very nice if v4l2_flash_release() could graciously behave with NULL
or negative error code as an argument, such as those produced by
v4l2_flash_init(). This makes error handling a lot easier in drivers.
--
Regards,
Sakari Ailus
e-mail: sakari.ailus@xxxxxx XMPP: sailus@xxxxxxxxxxxxxx
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