[PATCH v2] powerpc/fsl_rio: add missing of_node_put() in fsl_rio_setup()

[Yang Yingliang]

The of node returned by of_find_compatible_node() or for_each_child_of_node()
with refcount decremented, of_node_put() need be called after using it to avoid
refcount leak.

Fixes: abc3aeae3aaa ("fsl-rio: Add two ports and rapidio message units support")
Signed-off-by: Yang Yingliang <yangyingliang at huawei.com>
---
v1 -> v2:
  Add fix tag.
v1 patch link:
  https://lore.kernel.org/lkml/20220615032137.1878219-1-yangyingliang@huawei.com/
---
 arch/powerpc/sysdev/fsl_rio.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c
index c8f044d62fe2..1b0be4931f18 100644
--- a/arch/powerpc/sysdev/fsl_rio.c
+++ b/arch/powerpc/sysdev/fsl_rio.c
@@ -553,6 +553,7 @@ int fsl_rio_setup(struct platform_device *dev)
 		rc = -ENOMEM;
 		goto err_pw;
 	}
+	of_node_put(np);
 	range_start = of_read_number(dt_range, aw);
 	dbell->dbell_regs = (struct rio_dbell_regs *)(rmu_regs_win +
 				(u32)range_start);
@@ -581,6 +582,7 @@ int fsl_rio_setup(struct platform_device *dev)
 		rc = -ENOMEM;
 		goto err;
 	}
+	of_node_put(np);
 	range_start = of_read_number(dt_range, aw);
 	pw->pw_regs = (struct rio_pw_regs *)(rmu_regs_win + (u32)range_start);
 
@@ -590,6 +592,7 @@ int fsl_rio_setup(struct platform_device *dev)
 		if (!port_index) {
 			dev_err(&dev->dev, "Can't get %pOF property 'cell-index'\n",
 					np);
+			of_node_put(np);
 			continue;
 		}
 
@@ -597,6 +600,7 @@ int fsl_rio_setup(struct platform_device *dev)
 		if (!dt_range) {
 			dev_err(&dev->dev, "Can't get %pOF property 'ranges'\n",
 					np);
+			of_node_put(np);
 			continue;
 		}
 
@@ -619,6 +623,7 @@ int fsl_rio_setup(struct platform_device *dev)
 
 		dev_info(&dev->dev, "%pOF: LAW start 0x%016llx, size 0x%016llx.\n",
 				np, range_start, range_size);
+		of_node_put(np);
 
 		port = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
 		if (!port)
@@ -763,6 +768,7 @@ int fsl_rio_setup(struct platform_device *dev)
 err_dbell:
 	iounmap(rmu_regs_win);
 	rmu_regs_win = NULL;
+	of_node_put(np);
 err_rmu:
 	kfree(ops);
 err_ops:
-- 
2.25.1