pinctrl: samsung: Fix device node refcount leaks in S3C24xx wakeup controller init

In s3c24xx_eint_init() the for_each_child_of_node() loop is used with a
break to find a matching child node.  Although each iteration of
for_each_child_of_node puts the previous node, but early exit from loop
misses it.  This leads to leak of device node.

Cc: <stable@vger.kernel.org>
Fixes: af99a7507469 ("pinctrl: Add pinctrl-s3c24xx driver")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

diff --git a/drivers/pinctrl/samsung/pinctrl-s3c24xx.c b/drivers/pinctrl/samsung/pinctrl-s3c24xx.c
index 7e824e4..9bd0a3d 100644 (file)
--- a/drivers/pinctrl/samsung/pinctrl-s3c24xx.c
+++ b/drivers/pinctrl/samsung/pinctrl-s3c24xx.c
@@ -490,8 +490,10 @@ static int s3c24xx_eint_init(struct samsung_pinctrl_drv_data *d)
                return -ENODEV;
 
        eint_data = devm_kzalloc(dev, sizeof(*eint_data), GFP_KERNEL);
-       if (!eint_data)
+       if (!eint_data) {
+               of_node_put(eint_np);
                return -ENOMEM;
+       }
 
        eint_data->drvdata = d;
 
@@ -503,12 +505,14 @@ static int s3c24xx_eint_init(struct samsung_pinctrl_drv_data *d)
                irq = irq_of_parse_and_map(eint_np, i);
                if (!irq) {
                        dev_err(dev, "failed to get wakeup EINT IRQ %d\n", i);
+                       of_node_put(eint_np);
                        return -ENXIO;
                }
 
                eint_data->parents[i] = irq;
                irq_set_chained_handler_and_data(irq, handlers[i], eint_data);
        }
+       of_node_put(eint_np);
 
        bank = d->pin_banks;
        for (i = 0; i < d->nr_banks; ++i, ++bank) {