linux-kernel - [PATCH] gpio: raspberrypi-exp: decrease refcount on firmware dt node

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Date:   Mon, 10 Dec 2018 17:50:05 +0100
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Cc:     linux-rpi-kernel@...ts.infradead.org,
        dave.stevenson@...pberrypi.org,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] gpio: raspberrypi-exp: decrease refcount on firmware dt node

We're getting a reference RPi's firmware node in order to be able to
communicate with it's driver. We should decrease the reference count on
the dt node after being done with it.

Fixes: a98d90e7d588 ("gpio: raspberrypi-exp: Driver for RPi3 GPIO expander via mailbox service")
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
---
 drivers/gpio/gpio-raspberrypi-exp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpio/gpio-raspberrypi-exp.c b/drivers/gpio/gpio-raspberrypi-exp.c
index d6d36d537e37..b77ea16ffa03 100644
--- a/drivers/gpio/gpio-raspberrypi-exp.c
+++ b/drivers/gpio/gpio-raspberrypi-exp.c
@@ -206,6 +206,7 @@ static int rpi_exp_gpio_probe(struct platform_device *pdev)
 	}
 
 	fw = rpi_firmware_get(fw_node);
+	of_node_put(fw_node);
 	if (!fw)
 		return -EPROBE_DEFER;
 
-- 
2.19.2