[PATCH -next] gpio: of: add missing of_node_put() in of_gpiochip_scan_gpios()

[Wei Yongjun <weiyj.lk@xxxxxxxxx>]

From: Wei Yongjun <weiyongjun1@xxxxxxxxxx>

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@xxxxxxxxxx>
---
 drivers/gpio/gpiolib-of.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index b46be18..92b185f 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -251,8 +251,10 @@ 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;

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