[PATCH] serial/sunsu: add missing of_node_put()

[Yangtao Li]

of_find_node_by_path() acquires a reference to the node
returned by it and that reference needs to be dropped by its caller.
This place is not doing this, so fix it.

Signed-off-by: Yangtao Li <tiny.win...@gmail.com>
---
 drivers/tty/serial/sunsu.c | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/tty/serial/sunsu.c b/drivers/tty/serial/sunsu.c
index 6cf3e9b0728f..4a27c0114d50 100644
--- a/drivers/tty/serial/sunsu.c
+++ b/drivers/tty/serial/sunsu.c
@@ -1394,22 +1394,32 @@ static inline struct console *SUNSU_CONSOLE(void)
 static enum su_type su_get_type(struct device_node *dp)
 {
        struct device_node *ap = of_find_node_by_path("/aliases");
+       enum su_type rc = SU_PORT_PORT;
 
        if (ap) {
+               struct device_node *tmp;
                const char *keyb = of_get_property(ap, "keyboard", NULL);
                const char *ms = of_get_property(ap, "mouse", NULL);
 
                if (keyb) {
-                       if (dp == of_find_node_by_path(keyb))
-                               return SU_PORT_KBD;
+                       tmp = of_find_node_by_path(keyb);
+                       if (tmp && dp == tmp){
+                               rc = SU_PORT_KBD;
+                               goto out;
+                       }
                }
                if (ms) {
-                       if (dp == of_find_node_by_path(ms))
-                               return SU_PORT_MS;
+                       tmp = of_find_node_by_path(ms);
+                       if (tmp && dp == tmp){
+                               rc = SU_PORT_MS;
+                               goto out;
+                       }
                }
        }
 
-       return SU_PORT_PORT;
+out:
+       of_node_put(ap);
+       return rc;
 }
 
 static int su_probe(struct platform_device *op)
-- 
2.17.0