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Subject[PATCH 4.14 002/122] tee: optee: add missing of_node_put after of_device_is_available
Date
From: Julia Lawall <Julia.Lawall@lip6.fr>

commit c7c0d8df0b94a67377555a550b8d66ee2ad2f4ed upstream.

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: db878f76b9ff ("tee: optee: take DT status property into account")
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Cc: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/tee/optee/core.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/tee/optee/core.c
+++ b/drivers/tee/optee/core.c
@@ -590,8 +590,10 @@ static int __init optee_driver_init(void
return -ENODEV;

np = of_find_matching_node(fw_np, optee_match);
- if (!np || !of_device_is_available(np))
+ if (!np || !of_device_is_available(np)) {
+ of_node_put(np);
return -ENODEV;
+ }

optee = optee_probe(np);
of_node_put(np);

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