[PATCH 3/4] pinctrl: tegra: xusb: free maps on DT map failure

[Jiale Yao <yaojiale02@163.com>]

tegra_xusb_padctl_parse_subnode() can append mappings before a later
child or configuration operation fails.  The top-level callback currently
returns the error while retaining all mappings allocated for earlier
children.

Free the accumulated map and clear the output parameters on failure.

Signed-off-by: Jiale Yao <yaojiale02@163.com>
---
 drivers/pinctrl/tegra/pinctrl-tegra-xusb.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/tegra/pinctrl-tegra-xusb.c b/drivers/pinctrl/tegra/pinctrl-tegra-xusb.c
index c6a51bb21215..8873d7068867 100644
--- a/drivers/pinctrl/tegra/pinctrl-tegra-xusb.c
+++ b/drivers/pinctrl/tegra/pinctrl-tegra-xusb.c
@@ -248,10 +248,16 @@ static int tegra_xusb_padctl_dt_node_to_map(struct pinctrl_dev *pinctrl,
 						      &reserved_maps,
 						      num_maps);
 		if (err < 0)
-			return err;
+			goto err_free_map;
 	}
 
 	return 0;
+
+err_free_map:
+	pinctrl_utils_free_map(pinctrl, *maps, *num_maps);
+	*maps = NULL;
+	*num_maps = 0;
+	return err;
 }
 
 static const struct pinctrl_ops tegra_xusb_padctl_pinctrl_ops = {
-- 
2.34.1