Re: [PATCH v6 4/8] of: Reduce indentation in of_graph_get_next_endpoint

[Philipp Zabel <p.zabel@pengutronix.de>]

Hi Laurent,

Am Freitag, den 07.03.2014, 01:12 +0100 schrieb Laurent Pinchart:
> Hi Philipp,
> 
> Thank you for the patch.
> 
> I've submitted a fix for the of_graph_get_next_endpoint() function, but it 
> hasn't been applied yet due to the patch series that contained it needing more 
> work.
>
> The patch is available at https://patchwork.linuxtv.org/patch/21946/. I can 
> rebase it on top of this series, but I still wanted to let you know about it 
> in case you would like to integrate it.

Thank you for the pointer. A pity about the timing, this will mostly
revert my indentation patch. I'd be glad if you could rebase on top of
the merged series.

While we look at of_graph_get_next_endpoint(), could you explain the
reason behind the extra reference count increase on the prev node:
	/*
	 * Avoid dropping prev node refcount to 0 when getting the next
	 * child below.
	 */
	of_node_get(prev);
This unfortunately makes using the function in for_each style macros a
hassle. If that part wasn't there and all users that want to keep using
prev after the call were expected to increase refcount themselves,
we could have a
#define of_graph_for_each_endpoint(parent, endpoint) \
	for (endpoint = of_graph_get_next_endpoint(parent, NULL); \
	     endpoint != NULL; \
	     endpoint = of_graph_get_next_endpoint(parent, endpoint))

regards
Philipp