Re: [PATCHv5 1/9] of: introduce of_property_for_earch_phandle_with_args()

[Hiroshi Doyu <hdoyu-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>]

On Thu, 21 Nov 2013 13:43:28 +0100
Grant Likely <grant.likely-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> wrote:

> On Tue, 19 Nov 2013 11:33:05 +0200, Hiroshi Doyu <hdoyu-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> wrote:
> > The following pattern of code is tempting:
> > 
> >   for (i = 0; !of_parse_phandle_with_args(np, list, cells, i, args); i++)
> > 
> > Signed-off-by: Hiroshi Doyu <hdoyu-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
> 
> That's a very minimal commit message. Can you elaborate please.

The above can be:

"
  The following pattern of code is tempting to add a new member for
  of_property_for_each_*() family as an idiom.
  
    for (i = 0;
        !of_parse_phandle_with_args(np, list, cells, i, args); i++)
                  <do something with "args">;
"

Actual usage is here:

        int i;
        struct of_phandle_args args;

        of_property_for_each_phandle_with_args(dev->of_node, "iommus",
                                               "#iommu-cells", i, &args) {
                pr_debug("%s(i=%d) %s\n", __func__, i, dev_name(dev));

                if (!of_find_iommu_by_node(args.np))
                        return -EPROBE_DEFER;

Is this acceptable?