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gpio: arizona: put pm_runtime in case of failure 

[ Upstream commit 861254d826 ]

Calling pm_runtime_get_sync increments the counter even in case of
failure, causing incorrect ref count if pm_runtime_put is not called in
error handling paths. 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/20200605030052.78235-1-navid.emamdoost@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Navid Emamdoost 2020-06-04 22:00:52 -05:00 committed by Greg Kroah-Hartman
parent 52083907eb
commit de0d953ee7
1 changed files with 5 additions and 1 deletions
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6
drivers/gpio/gpio-arizona.c
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@ -64,6 +64,7 @@ static int arizona_gpio_get(struct gpio_chip *chip, unsigned offset)
ret = pm_runtime_get_sync(chip->parent);
if (ret < 0) {
dev_err(chip->parent, "Failed to resume: %d\n", ret);
pm_runtime_put_autosuspend(chip->parent);
return ret;
}
@ -72,12 +73,15 @@ static int arizona_gpio_get(struct gpio_chip *chip, unsigned offset)
if (ret < 0) {
dev_err(chip->parent, "Failed to drop cache: %d\n",
ret);
pm_runtime_put_autosuspend(chip->parent);
return ret;
}
ret = regmap_read(arizona->regmap, reg, &val);
if (ret < 0)
if (ret < 0) {
pm_runtime_put_autosuspend(chip->parent);
return ret;
}
pm_runtime_mark_last_busy(chip->parent);
pm_runtime_put_autosuspend(chip->parent);