This is a note to let you know that I've just added the patch titled
pwm: img: Fix PM reference leak in img_pwm_enable()
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pwm-img-fix-pm-reference-leak-in-img_pwm_enable.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f91d7795082fa9e7758f5f22ad89a762354c4a64
Author: Zou Wei <zou_wei@xxxxxxxxxx>
Date: Wed May 12 11:57:17 2021 +0800
pwm: img: Fix PM reference leak in img_pwm_enable()
[ Upstream commit fde25294dfd8e36e4e30b693c27a86232864002a ]
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@xxxxxxxxxx>
Signed-off-by: Zou Wei <zou_wei@xxxxxxxxxx>
Signed-off-by: Thierry Reding <thierry.reding@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/pwm/pwm-img.c b/drivers/pwm/pwm-img.c
index a34d95ed70b2..22c002e685b3 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;
