[PATCH v6 3/8] of: Warn if of_graph_get_next_endpoint is called with the root node

Philipp Zabel
2014-03-05T09:26:31Z

If of_graph_get_next_endpoint is given a parentless node instead of an
endpoint node, it is clearly a bug.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
---
Changes since v5:
- Added parentless previous endpoint's full name to warning
---
drivers/of/base.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index b2f223f..b5e690b 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -2028,8 +2028,8 @@ struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
of_node_put(node);
} else {
port = of_get_parent(prev);
- if (!port)
- /* Hm, has someone given us the root node ?... */
+ 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. */
--
1.9.0.rc3