[PATCH 05/15] ARM: imx51: fix a leaked reference by addingmissing of_node_put

From: Wen Yang
Date: Fri Mar 01 2019 - 03:57:20 EST

The call to of_get_next_child returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last

Detected by coccinelle with the following warnings:
./arch/arm/mach-imx/mach-imx51.c:64:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 57, but without a corresponding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@xxxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: Shawn Guo <shawnguo@xxxxxxxxxx>
Cc: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
Cc: Pengutronix Kernel Team <kernel@xxxxxxxxxxxxxx>
Cc: Fabio Estevam <festevam@xxxxxxxxx>
Cc: NXP Linux Team <linux-imx@xxxxxxx>
Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
arch/arm/mach-imx/mach-imx51.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-imx/mach-imx51.c b/arch/arm/mach-imx/mach-imx51.c
index c7169c2..08c7892 100644
--- a/arch/arm/mach-imx/mach-imx51.c
+++ b/arch/arm/mach-imx/mach-imx51.c
@@ -59,6 +59,7 @@ static void __init imx51_m4if_setup(void)

m4if_base = of_iomap(np, 0);
+ of_node_put(np);
if (!m4if_base) {
pr_err("Unable to map M4IF registers\n");