of: Warn if of_graph_parse_endpoint is called with the root node
If of_graph_parse_endpoint is given a parentless node instead of an
endpoint node, it is clearly a bug.
Signed-off-by: Philipp Zabel <[email protected]>
Acked-by: Tomi Valkeinen <[email protected]>
Acked-by: Mauro Carvalho Chehab <[email protected]>
Acked-by: Sylwester Nawrocki <[email protected]>
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 715144af..fd4b9c2 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -1996,6 +1996,9 @@
{
struct device_node *port_node = of_get_parent(node);
+ WARN_ONCE(!port_node, "%s(): endpoint %s has no parent node\n",
+ __func__, node->full_name);
+
memset(endpoint, 0, sizeof(*endpoint));
endpoint->local_node = node;
