[PATCH v2 1/3] pinctrl: core: fix possible memory leak when pinctrl_enable() fails

[Yang Yingliang <yangyingliang@xxxxxxxxxx>]

In devm_pinctrl_register(), if pinctrl_enable() fails in pinctrl_register(),
the "pctldev" has not been added to dev resources, so devm_pinctrl_dev_release()
can not be called, it leads memory leak.

Introduce pinctrl_uninit_controller(), call it in the error path to free memory.

Fixes: 5038a66dad01 ("pinctrl: core: delete incorrect free in pinctrl_enable()")
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
---
 drivers/pinctrl/core.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index cffeb869130d..7343a17c2873 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -2080,6 +2080,14 @@ pinctrl_init_controller(struct pinctrl_desc *pctldesc, struct device *dev,
 	return ERR_PTR(ret);
 }
 
+static void pinctrl_uninit_controller(struct pinctrl_dev *pctldev, struct pinctrl_desc *pctldesc)
+{
+	pinctrl_free_pindescs(pctldev, pctldesc->pins,
+			      pctldesc->npins);
+	mutex_destroy(&pctldev->mutex);
+	kfree(pctldev);
+}
+
 static int pinctrl_claim_hogs(struct pinctrl_dev *pctldev)
 {
 	pctldev->p = create_pinctrl(pctldev->dev, pctldev);
@@ -2160,8 +2168,10 @@ struct pinctrl_dev *pinctrl_register(struct pinctrl_desc *pctldesc,
 		return pctldev;
 
 	error = pinctrl_enable(pctldev);
-	if (error)
+	if (error) {
+		pinctrl_uninit_controller(pctldev, pctldesc);
 		return ERR_PTR(error);
+	}
 
 	return pctldev;
 }
-- 
2.25.1