Re: [PATCH v2 3/8] of: Decrement refcount of previous endpoint in of_graph_get_next_endpoint

[Laurent Pinchart]

Hi Philipp,

Thank you for the patch.

On Wednesday 10 September 2014 12:58:23 Philipp Zabel wrote:
> Decrementing the reference count of the previous endpoint node allows to
> use the of_graph_get_next_endpoint function in a for_each_... style macro.
> Prior to this patch, all current users of this function that actually pass
> a non-NULL prev parameter should be changed to not decrement the passed
> prev argument's refcount themselves.
> 
> Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>

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

> ---
>  drivers/of/base.c | 9 +--------
>  1 file changed, 1 insertion(+), 8 deletions(-)
> 
> diff --git a/drivers/of/base.c b/drivers/of/base.c
> index d8574ad..a49b5628 100644
> --- a/drivers/of/base.c
> +++ b/drivers/of/base.c
> @@ -2058,8 +2058,7 @@ EXPORT_SYMBOL(of_graph_parse_endpoint);
>   * @prev: previous endpoint node, or NULL to get first
>   *
>   * Return: An 'endpoint' node pointer with refcount incremented. Refcount
> - * of the passed @prev node is not decremented, the caller have to use
> - * of_node_put() on it when done.
> + * of the passed @prev node is decremented.
>   */
>  struct device_node *of_graph_get_next_endpoint(const struct device_node
> *parent, struct device_node *prev)
> @@ -2095,12 +2094,6 @@ struct device_node *of_graph_get_next_endpoint(const
> struct device_node *parent, if (WARN_ONCE(!port, "%s(): endpoint %s has no
> parent node\n",
>  			      __func__, prev->full_name))
>  			return NULL;
> -
> -		/*
> -		 * Avoid dropping prev node refcount to 0 when getting the next
> -		 * child below.
> -		 */
> -		of_node_get(prev);
>  	}
> 
>  	while (1) {

-- 
Regards,

Laurent Pinchart

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/