[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 <yangyingli...@huawei.com>
---
v1 -> v2:
  Add fix tag.
v1 patch link:
  
https://lore.kernel.org/lkml/20220615032137.1878219-1-yangyingli...@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