[PATCH 4.19 124/321] gpio: raspberrypi-exp: decrease refcount on firmware dt node

Greg Kroah-Hartman
2019-12-03T22:50:43Z

From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>

[ Upstream commit 85af74c474b21940e88483fd48f6094145c89d97 ]

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@suse.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 d6d36d537e373..b77ea16ffa031 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;

--
2.20.1