fbdev: omapfb: Fix an OF node leak in dss_of_port_get_parent_device()

dss_of_port_get_parent_device() leaks an OF node reference when i >= 2
and struct device_node *np is present. Since of_get_next_parent()
obtains a reference of the returned OF node, call of_node_put() before
returning NULL.

This was found by an experimental verifier that I am developing, and no
runtime test was able to be performed due to that lack of actual
devices.

Fixes: f76ee892a99e ("omapfb: copy omapdss & displays for omapfb")
Signed-off-by: Joe Hattori <joe@pf.is.s.u-tokyo.ac.jp>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/drivers/video/fbdev/omap2/omapfb/dss/dss-of.c b/drivers/video/fbdev/omap2/omapfb/dss/dss-of.c
index c04cbe0ef173d604959d897fe3230c2ea15869c7..7c636db79882561c4b85e38ce98f91779a2385c8 100644 (file)
--- a/drivers/video/fbdev/omap2/omapfb/dss/dss-of.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/dss-of.c
@@ -36,6 +36,7 @@ struct device_node *dss_of_port_get_parent_device(struct device_node *port)
                np = of_get_next_parent(np);
        }
 
+       of_node_put(np);
        return NULL;
 }