[PATCH v2 4/4] pinctrl: samsung: free maps on DT map failure

[Jiale Yao <yaojiale02@163.com>]

samsung_dt_subnode_to_map() can reserve map storage before adding
configuration entries.  The no-child path returns its error directly, and
the child path frees mappings on failure.

Use one error path that frees the accumulated map in both cases.  The
caller ignores the output parameters when the mapping callback returns an
error, so they do not need to be reset after freeing the map.

Signed-off-by: Jiale Yao <yaojiale02@163.com>
---
 drivers/pinctrl/samsung/pinctrl-samsung.c | 24 ++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.c b/drivers/pinctrl/samsung/pinctrl-samsung.c
index 5ecc9ed4c44d..0a1e6063fb5f 100644
--- a/drivers/pinctrl/samsung/pinctrl-samsung.c
+++ b/drivers/pinctrl/samsung/pinctrl-samsung.c
@@ -259,22 +259,28 @@ static int samsung_dt_node_to_map(struct pinctrl_dev *pctldev,
 	*map = NULL;
 	*num_maps = 0;
 
-	if (!of_get_child_count(np_config))
-		return samsung_dt_subnode_to_map(drvdata, pctldev->dev,
-							np_config, map,
-							&reserved_maps,
-							num_maps);
+	if (!of_get_child_count(np_config)) {
+		ret = samsung_dt_subnode_to_map(drvdata, pctldev->dev,
+						np_config, map, &reserved_maps,
+						num_maps);
+		if (ret < 0)
+			goto err_free_map;
+
+		return 0;
+	}
 
 	for_each_child_of_node_scoped(np_config, np) {
 		ret = samsung_dt_subnode_to_map(drvdata, pctldev->dev, np, map,
 						&reserved_maps, num_maps);
-		if (ret < 0) {
-			samsung_dt_free_map(pctldev, *map, *num_maps);
-			return ret;
-		}
+		if (ret < 0)
+			goto err_free_map;
 	}
 
 	return 0;
+
+err_free_map:
+	samsung_dt_free_map(pctldev, *map, *num_maps);
+	return ret;
 }
 
 #ifdef CONFIG_DEBUG_FS
-- 
2.34.1