[PATCH v2 1/4] pinctrl: sprd: free maps on DT map failure

[Jiale Yao]

sprd_dt_node_to_map() reserves map storage before adding mux and
configuration entries.  If a later operation fails, the error path only
frees the temporary configurations and leaves the map allocation reachable
through the output pointer.

Free the partially built map on failure.  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.

Fixes: 41d32cfce1ae ("pinctrl: sprd: Add Spreadtrum pin control driver")
Signed-off-by: Jiale Yao <yaojiale02@xxxxxxx>
Reviewed-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
---
 drivers/pinctrl/sprd/pinctrl-sprd.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/pinctrl/sprd/pinctrl-sprd.c b/drivers/pinctrl/sprd/pinctrl-sprd.c
index 16cf9d15f247..a565d4fd4233 100644
--- a/drivers/pinctrl/sprd/pinctrl-sprd.c
+++ b/drivers/pinctrl/sprd/pinctrl-sprd.c
@@ -326,6 +326,9 @@ static int sprd_dt_node_to_map(struct pinctrl_dev *pctldev,
 
 out:
 	kfree(configs);
+	if (ret < 0)
+		pinctrl_utils_free_map(pctldev, *map, *num_maps);
+
 	return ret;
 }
 
-- 
2.34.1