[PATCH AUTOSEL 5.0 07/66] ARM: OMAP2+: add missing of_node_put after of_device_is_available

Sasha Levin
2019-04-24T15:00:12Z

From: Julia Lawall <Julia.Lawall@lip6.fr>

[ Upstream commit 30645307e5d2c8a4caf978558c66121ac91ad17e ]

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: e0c827aca0730 ("drm/omap: Populate DSS children in omapdss driver")
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin (Microsoft) <sashal@kernel.org>
---
arch/arm/mach-omap2/display.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-omap2/display.c b/arch/arm/mach-omap2/display.c
index 1444b4b4bd9f..439e143cad7b 100644
--- a/arch/arm/mach-omap2/display.c
+++ b/arch/arm/mach-omap2/display.c
@@ -250,8 +250,10 @@ static int __init omapdss_init_of(void)
if (!node)
return 0;

- if (!of_device_is_available(node))
+ if (!of_device_is_available(node)) {
+ of_node_put(node);
return 0;
+ }

pdev = of_find_device_by_node(node);

--
2.19.1