[PATCH 4.19 02/86] gpio: arizona: handle pm_runtime_get_sync failure case

Greg Kroah-Hartman
2020-07-27T14:39:42Z

From: Navid Emamdoost <navid.emamdoost@gmail.com>

[ Upstream commit e6f390a834b56583e6fc0949822644ce92fbb107 ]

Calling pm_runtime_get_sync increments the counter even in case of
failure, causing incorrect ref count. Call pm_runtime_put if
pm_runtime_get_sync fails.

Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20200605025207.65719-1-navid.emamdoost@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpio/gpio-arizona.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/gpio/gpio-arizona.c b/drivers/gpio/gpio-arizona.c
index ba51ea15f3794..485aa45fc5d53 100644
--- a/drivers/gpio/gpio-arizona.c
+++ b/drivers/gpio/gpio-arizona.c
@@ -111,6 +111,7 @@ static int arizona_gpio_direction_out(struct gpio_chip *chip,
ret = pm_runtime_get_sync(chip->parent);
if (ret < 0) {
dev_err(chip->parent, "Failed to resume: %d\n", ret);
+ pm_runtime_put(chip->parent);
return ret;
}
}
--
2.25.1