[PATCH v2 12/15] ARM: vexpress: fix a leaked reference by adding missing of_node_put

From: Wen Yang
Date: Tue Mar 05 2019 - 06:33:47 EST


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

Detected by coccinelle with the following warnings:
./arch/arm/mach-vexpress/dcscb.c:150:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 145, but without a corresponding object release within this function.
./arch/arm/mach-vexpress/dcscb.c:160:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 145, but without a corresponding object release within this function.
./arch/arm/mach-vexpress/dcscb.c:171:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 145, but without a corresponding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@xxxxxxxxxx>
Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Cc: Liviu Dudau <liviu.dudau@xxxxxxx>
Cc: Sudeep Holla <sudeep.holla@xxxxxxx>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
v2->v1: add a missing space between "adding" and "missing"

arch/arm/mach-vexpress/dcscb.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-vexpress/dcscb.c b/arch/arm/mach-vexpress/dcscb.c
index ee2a0fa..aaade91 100644
--- a/arch/arm/mach-vexpress/dcscb.c
+++ b/arch/arm/mach-vexpress/dcscb.c
@@ -146,6 +146,7 @@ static int __init dcscb_init(void)
if (!node)
return -ENODEV;
dcscb_base = of_iomap(node, 0);
+ of_node_put(node);
if (!dcscb_base)
return -EADDRNOTAVAIL;
cfg = readl_relaxed(dcscb_base + DCS_CFG_R);
--
2.9.5