of_pci_dma_range_parser_init() can fail when the node lacks a dma-ranges
property. That error path returns without dropping the reference taken
by of_find_node_by_path(). Add the missing of_node_put().

Fixes: 04db93a95aef ("of/unittest: Add dma-ranges address translation tests")
Cc: stable@vger.kernel.org
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
---
 drivers/of/unittest.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index e10fff3f68c4..939cbff45ab1 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -1198,6 +1198,7 @@ static void __init of_unittest_pci_dma_ranges(void)
 
 	if (of_pci_dma_range_parser_init(&parser, np)) {
 		pr_err("missing dma-ranges property\n");
+		of_node_put(np);
 		return;
 	}
 
-- 
2.34.1