From: Zou Wei <zou_wei@huawei.com>
Date: Wed, 12 May 2021 03:57:17 +0000 (+0800)
Subject: pwm: img: Fix PM reference leak in img_pwm_enable()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=fde25294dfd8e36e4e30b693c27a86232864002a;p=linux.git

pwm: img: Fix PM reference leak in img_pwm_enable()

pm_runtime_get_sync will increment pm usage counter even it failed.
Forgetting to putting operation will result in reference leak here.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zou Wei <zou_wei@huawei.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---

diff --git a/drivers/pwm/pwm-img.c b/drivers/pwm/pwm-img.c
index cc37054589ccf..11b16ecc4f967 100644
--- a/drivers/pwm/pwm-img.c
+++ b/drivers/pwm/pwm-img.c
@@ -156,7 +156,7 @@ static int img_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
 	struct img_pwm_chip *pwm_chip = to_img_pwm_chip(chip);
 	int ret;
 
-	ret = pm_runtime_get_sync(chip->dev);
+	ret = pm_runtime_resume_and_get(chip->dev);
 	if (ret < 0)
 		return ret;