linux-kernel - [PATCH] powerpc/fsl_rio: Fix refcount leak in fsl_rio

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Date:   Thu, 12 May 2022 16:37:18 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Miaoqian Lin <linmq006@...il.com>,
        Nicholas Piggin <npiggin@...il.com>,
        Liu Gang <Gang.Liu@...escale.com>,
        Jin Qing <b24347@...escale.com>,
        Alexandre Bounine <alexandre.bounine@....com>,
        Li Yang <leoyang.li@....com>,
        Kumar Gala <galak@...nel.crashing.org>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH] powerpc/fsl_rio: Fix refcount leak in fsl_rio_setup

of_parse_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak.

Fixes: abc3aeae3aaa ("fsl-rio: Add two ports and rapidio message units support")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 arch/powerpc/sysdev/fsl_rio.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c
index ff7906b48ca1..1bfc9afa8a1a 100644
--- a/arch/powerpc/sysdev/fsl_rio.c
+++ b/arch/powerpc/sysdev/fsl_rio.c
@@ -505,8 +505,10 @@ int fsl_rio_setup(struct platform_device *dev)
 	if (rc) {
 		dev_err(&dev->dev, "Can't get %pOF property 'reg'\n",
 				rmu_node);
+		of_node_put(rmu_node);
 		goto err_rmu;
 	}
+	of_node_put(rmu_node);
 	rmu_regs_win = ioremap(rmu_regs.start, resource_size(&rmu_regs));
 	if (!rmu_regs_win) {
 		dev_err(&dev->dev, "Unable to map rmu register window\n");
-- 
2.25.1