gpio: of: add missing of_node_put() in of_gpiochip_scan_gpios()

When terminating for_each_available_child_of_node() iteration
with break or return, of_node_put() should be used to prevent
stale device node references from being left behind.

This is detected by Coccinelle semantic patch.

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 3fa4e84b4327..5236966b1bdf 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -247,8 +247,10 @@ static int of_gpiochip_scan_gpios(struct gpio_chip *chip)
                         continue;
 
                 ret = gpiod_hog(desc, name, lflags, dflags);
-                if (ret < 0)
+                if (ret < 0) {
+                        of_node_put(np);
                         return ret;
+                }
         }
 
         return 0;