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: 1a75e81baf4f ("of/unittest: Add empty 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 939cbff45ab1..6bc5babddf0a 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -1250,6 +1250,7 @@ static void __init of_unittest_pci_empty_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

Hi Wentao,

On 13:03 Thu 17 Sep     , Wentao Liang wrote:
> 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: 1a75e81baf4f ("of/unittest: Add empty 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 939cbff45ab1..6bc5babddf0a 100644
> --- a/drivers/of/unittest.c
> +++ b/drivers/of/unittest.c
> @@ -1250,6 +1250,7 @@ static void __init of_unittest_pci_empty_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
>

Thanks for your patch!

Reviewed-by: Andrea della Porta <andrea.porta@suse.com>