[PATCH] pinctrl: imx: handle radix_tree_insert() errors in imx_pinctrl_parse_functions()

[Haotian Zhang]

imx_pinctrl_parse_functions() doesn't check the result of
radix_tree_insert() which may return a negative error code
if the insertion fails.

Check the return value of radix_tree_insert() and return upon failure.

Fixes: a51c158bf0f7 ("pinctrl: imx: use radix trees for groups and functions")
Signed-off-by: Haotian Zhang <vulab at iscas.ac.cn>
---
 drivers/pinctrl/freescale/pinctrl-imx.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/freescale/pinctrl-imx.c b/drivers/pinctrl/freescale/pinctrl-imx.c
index 731c58ad43ee..c20bba7ea306 100644
--- a/drivers/pinctrl/freescale/pinctrl-imx.c
+++ b/drivers/pinctrl/freescale/pinctrl-imx.c
@@ -624,8 +624,14 @@ static int imx_pinctrl_parse_functions(struct device_node *np,
 		 * FIXME: This should use pinctrl_generic_add_group() and not
 		 * access the private radix tree directly.
 		 */
-		radix_tree_insert(&pctl->pin_group_tree,
-				  ipctl->group_index++, grp);
+		ret = radix_tree_insert(&pctl->pin_group_tree,
+				  ipctl->group_index, grp);
+		if (ret) {
+			mutex_unlock(&ipctl->mutex);
+			dev_err(ipctl->dev, "radix_tree_insert failed\n");
+			return ret;
+		}
+		ipctl->group_index++;
 		mutex_unlock(&ipctl->mutex);
 
 		imx_pinctrl_parse_groups(child, grp, ipctl, i++);
-- 
2.25.1