[PATCH v3 1/8] Input: synaptics-rmi4: Use of_get_child_by_name() instead of of_find_node_by_name()

From: Andrew Duggan
Date: Thu Jul 14 2016 - 02:08:26 EST

Calling of_find_node_by_name() assumes that the caller has incremented
the refcount of the of_node being passed in. Currently, the caller is
not incrementing the refcount of the of_node which results in the node
being prematurely freed when of_find_node_by_name() calls of_node_put()
on it. Instead use of_get_child_by_name() which does not call put on the

Signed-off-by: Andrew Duggan <aduggan@xxxxxxxxxxxxx>
drivers/input/rmi4/rmi_bus.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/input/rmi4/rmi_bus.c b/drivers/input/rmi4/rmi_bus.c
index b368b05..253df96 100644
--- a/drivers/input/rmi4/rmi_bus.c
+++ b/drivers/input/rmi4/rmi_bus.c
@@ -157,11 +157,11 @@ static int rmi_function_match(struct device *dev, struct device_driver *drv)
static void rmi_function_of_probe(struct rmi_function *fn)
char of_name[9];
+ struct device_node *node = fn->rmi_dev->xport->dev->of_node;

snprintf(of_name, sizeof(of_name), "rmi4-f%02x",
- fn->dev.of_node = of_find_node_by_name(
- fn->rmi_dev->xport->dev->of_node, of_name);
+ fn->dev.of_node = of_get_child_by_name(node, of_name);
static inline void rmi_function_of_probe(struct rmi_function *fn)