linux-kernel - [PATCH v2] arm: mach-imx: Fix refcount leak in mm-imx3.c

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Message-Id: <20220616152505.3989451-1-windhl@126.com>
Date:   Thu, 16 Jun 2022 23:25:05 +0800
From:   Liang He <windhl@....com>
To:     linux@...linux.org.uk, shawnguo@...nel.org, s.hauer@...gutronix.de,
        kernel@...gutronix.de, festevam@...il.com, linux-imx@....com
Cc:     windhl@....com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] arm: mach-imx: Fix refcount leak in mm-imx3.c

In imx31_init_early() and imx35_init_early(), of_find_compatible_node()
will return a node pointer with refcount incremented. We should use
of_node_put() when it is not used anymore.

Signed-off-by: Liang He <windhl@....com>
---
 changelog:

 v2: add missing put for both imx31_xx and imx35_xx
 v1: only add missing put in imx31_xx

 arch/arm/mach-imx/mm-imx3.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mach-imx/mm-imx3.c b/arch/arm/mach-imx/mm-imx3.c
index 28db97289ee8..d333a8fdb731 100644
--- a/arch/arm/mach-imx/mm-imx3.c
+++ b/arch/arm/mach-imx/mm-imx3.c
@@ -107,6 +107,7 @@ void __init imx31_init_early(void)
 	arm_pm_idle = imx31_idle;
 	np = of_find_compatible_node(NULL, NULL, "fsl,imx31-ccm");
 	mx3_ccm_base = of_iomap(np, 0);
+	of_node_put(np);
 	BUG_ON(!mx3_ccm_base);
 }
 #endif /* ifdef CONFIG_SOC_IMX31 */
@@ -144,6 +145,7 @@ void __init imx35_init_early(void)
 	arch_ioremap_caller = imx3_ioremap_caller;
 	np = of_find_compatible_node(NULL, NULL, "fsl,imx35-ccm");
 	mx3_ccm_base = of_iomap(np, 0);
+	of_node_put(np);
 	BUG_ON(!mx3_ccm_base);
 }
 #endif /* ifdef CONFIG_SOC_IMX35 */
-- 
2.25.1