Re: [PATCH v2 4/8] of: Add for_each_endpoint_of_node helper macro

Laurent Pinchart
2014-09-11T09:22:22Z

Hi Philipp,

Thank you for the patch.

On Wednesday 10 September 2014 12:58:24 Philipp Zabel wrote:
> Note that while of_graph_get_next_endpoint decrements the reference count
> of the child node passed to it, of_node_put(child) still has to be called
> manually when breaking out of the loop.
>
> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
> Changes since v1:
> - Added a comment about the child node reference count when breaking out
> of the loop
> ---
> include/linux/of_graph.h | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/include/linux/of_graph.h b/include/linux/of_graph.h
> index befef42..e43442e 100644
> --- a/include/linux/of_graph.h
> +++ b/include/linux/of_graph.h
> @@ -26,6 +26,17 @@ struct of_endpoint {
> const struct device_node *local_node;
> };
>
> +/**
> + * for_each_endpoint_of_node - iterate over every endpoint in a device node
> + * @parent: parent device node containing ports and endpoints
> + * @child: loop variable pointing to the current endpoint node
> + *
> + * When breaking out of the loop, of_node_put(child) has to be called
> manually. + */
> +#define for_each_endpoint_of_node(parent, child) \
> + for (child = of_graph_get_next_endpoint(parent, NULL); child != NULL; \
> + child = of_graph_get_next_endpoint(parent, child))
> +
> #ifdef CONFIG_OF
> int of_graph_parse_endpoint(const struct device_node *node,
> struct of_endpoint *endpoint);

--
Regards,

Laurent Pinchart