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tee: optee: add missing of_node_put after of_device_is_available

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commit c7c0d8df0b 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: db878f76b9 ("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>
This commit is contained in:
Julia Lawall 2019-02-23 14:20:36 +01:00 committed by Greg Kroah-Hartman
parent 2008d0e3d3
commit 4f4ab0b49c
1 changed files with 3 additions and 1 deletions
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4
drivers/tee/optee/core.c
View file

@ -696,8 +696,10 @@ 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);