[PATCH 07/12] drm: omapdrm: add missing of_node_put after of_device_is_available

Julia Lawall
2019-02-23T13:59:15Z

Add an of_node_put when a tested device node is not available.

The semantic patch that fixes this problem is as follows
(http://coccinelle.lip6.fr):

// <smpl>
@@
identifier f;
local idexpression e;
expression x;
@@

e = f(...);
... when != of_node_put(e)
when != x = e
when != e = x
when any
if (<+...of_device_is_available(e)...+>) {
... when != of_node_put(e)
(
return e;
|
+ of_node_put(e);
return ...;
)
}
// </smpl>

Fixes: f2dd36ac9974c ("OMAPDSS: move 'compatible' converter to omapdss driver")
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff -u -p a/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c b/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c
--- a/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c
+++ b/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c
@@ -192,8 +192,10 @@ static int __init omapdss_boot_init(void

dss = of_find_matching_node(NULL, omapdss_of_match);

- if (dss == NULL || !of_device_is_available(dss))
+ if (dss == NULL || !of_device_is_available(dss)) {
+ of_node_put(dss);
return 0;
+ }

omapdss_walk_device(dss, true);