pinctrl: pistachio: fix leaked of_node references

[ Upstream commit 44a4455ac2c6b0981eace683a2b6eccf47689022 ]

The call to of_get_child_by_name returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with the following warnings:
./drivers/pinctrl/pinctrl-pistachio.c:1422:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 1360, but without a corresponding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-gpio@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/pinctrl/pinctrl-pistachio.c b/drivers/pinctrl/pinctrl-pistachio.c
index 302190d..0d7d379 100644 (file)
--- a/drivers/pinctrl/pinctrl-pistachio.c
+++ b/drivers/pinctrl/pinctrl-pistachio.c
@@ -1368,6 +1368,7 @@ static int pistachio_gpio_register(struct pistachio_pinctrl *pctl)
                if (!of_find_property(child, "gpio-controller", NULL)) {
                        dev_err(pctl->dev,
                                "No gpio-controller property for bank %u\n", i);
+                       of_node_put(child);
                        ret = -ENODEV;
                        goto err;
                }
@@ -1375,6 +1376,7 @@ static int pistachio_gpio_register(struct pistachio_pinctrl *pctl)
                irq = irq_of_parse_and_map(child, 0);
                if (irq < 0) {
                        dev_err(pctl->dev, "No IRQ for bank %u: %d\n", i, irq);
+                       of_node_put(child);
                        ret = irq;
                        goto err;
                }