[PATCH v3] powerpc/fsl_rio: add missing of_node_put() in fsl_rio_setup()

[Yang Yingliang]

The of node returned by of_find_compatible_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>
---
v2 -> v3:
  drop of_node_put() in loop for_each_child_of_node(), it's not needed.

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 | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c
index c8f044d62fe2..1ad962d3060e 100644
--- a/arch/powerpc/sysdev/fsl_rio.c
+++ b/arch/powerpc/sysdev/fsl_rio.c
@@ -550,12 +550,13 @@ int fsl_rio_setup(struct platform_device *dev)
 	if (!dt_range) {
 		pr_err("%pOF: unable to find 'reg' property\n",
 			np);
 		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);
 
 	/*set up port write node*/
 	np = of_find_compatible_node(NULL, NULL, "fsl,srio-port-write-unit");
@@ -578,12 +579,13 @@ int fsl_rio_setup(struct platform_device *dev)
 	if (!dt_range) {
 		pr_err("%pOF: unable to find 'reg' property\n",
 			np);
 		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);
 
 	/*set up ports node*/
 	for_each_child_of_node(dev->dev.of_node, np) {
 		port_index = of_get_property(np, "cell-index", NULL);
@@ -760,12 +762,13 @@ int fsl_rio_setup(struct platform_device *dev)
 err_pw:
 	kfree(dbell);
 	dbell = NULL;
 err_dbell:
 	iounmap(rmu_regs_win);
 	rmu_regs_win = NULL;
+	of_node_put(np);
 err_rmu:
 	kfree(ops);
 err_ops:
 	iounmap(rio_regs_win);
 	rio_regs_win = NULL;
 err_rio_regs:
-- 
2.25.1