* Rob Herring <robh+dt@xxxxxxxxxx> [170727 15:19]:
> On Thu, Jul 27, 2017 at 4:44 AM, Tony Lindgren <tony@xxxxxxxxxxx> wrote:
> > --- a/drivers/of/property.c
> > +++ b/drivers/of/property.c
> > @@ -708,6 +708,15 @@ struct device_node *of_graph_get_port_parent(struct device_node *node)
> > {
> > unsigned int depth;
> >
> > + if (!node)
> > + return NULL;
> > +
> > + /*
> > + * Preserve usecount for passed in node as of_get_next_parent()
> > + * will do of_node_put() on it.
> > + */
> > + of_node_get(node);
>
> I think this messes up of_graph_get_remote_port_parent(). First it
> calls of_graph_get_remote_endpoint which returns the endpoint node
> with ref count incremented. Then you are incrementing it again here.
Hmm OK looks like I missed that one. If we want to have
of_graph_get_port_parent not trash the node passed to it, we should
just change things there too:
struct device_node *of_graph_get_remote_port_parent(
const struct device_node *node)
{
struct device_node *np, *pp;
/* Get remote endpoint node. */
np = of_graph_get_remote_endpoint(node);
pp = of_graph_get_port_parent(np);
of_node_put(np);
return pp;
}
EXPORT_SYMBOL(of_graph_get_remote_port_parent);
Does that make sense to you?
> > diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c
> > --- a/sound/soc/generic/audio-graph-card.c
> > +++ b/sound/soc/generic/audio-graph-card.c
> > @@ -224,7 +224,6 @@ static int asoc_graph_card_parse_of(struct graph_card_data *priv)
> >
> > of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
> > ret = asoc_graph_card_dai_link_of(it.node, priv, idx++);
> > - of_node_put(it.node);
> > if (ret < 0)
> > return ret;
>
> I think you need a put here.
Do you mean on error it should be as below, right?
ret = asoc_graph_card_dai_link_of(it.node, priv, idx++);
if (ret < 0) {
of_node_put(it.node);
return ret;
}
Regards,
Tony
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