linux-kernel - [PATCH 2/3] OF: properties: add missing of_node

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Message-Id: <1547372691-28324-3-git-send-email-Julia.Lawall@lip6.fr>
Date:   Sun, 13 Jan 2019 10:44:50 +0100
From:   Julia Lawall <Julia.Lawall@...6.fr>
To:     Rob Herring <robh+dt@...nel.org>
Cc:     kernel-janitors@...r.kernel.org,
        Frank Rowand <frowand.list@...il.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] OF: properties: add missing of_node_put

Add an of_node_put when the result of of_graph_get_remote_port_parent is
not available.

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

// <smpl>
@r exists@
local idexpression e;
expression x;
@@
e = of_graph_get_remote_port_parent(...);
... when != x = e
    when != true e == NULL
    when != of_node_put(e)
    when != of_fwnode_handle(e)
(
return e;
|
*return ...;
)
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
 drivers/of/property.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/of/property.c b/drivers/of/property.c
index 0843003..8631efa 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c
@@ -806,6 +806,7 @@ struct device_node *of_graph_get_remote_node(const struct device_node *node,
 
 	if (!of_device_is_available(remote)) {
 		pr_debug("not available for remote node\n");
+		of_node_put(remote);
 		return NULL;
 	}