From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Zou Wei <zou_wei@huawei.com>, Hulk Robot <hulkci@huawei.com>,
Thierry Reding <thierry.reding@gmail.com>,
Sasha Levin <sashal@kernel.org>,
linux-pwm@vger.kernel.org
Subject: [PATCH AUTOSEL 5.12 33/43] pwm: img: Fix PM reference leak in img_pwm_enable()
Date: Sat, 10 Jul 2021 19:49:05 -0400 [thread overview]
Message-ID: <20210710234915.3220342-33-sashal@kernel.org> (raw)
In-Reply-To: <20210710234915.3220342-1-sashal@kernel.org>
From: Zou Wei <zou_wei@huawei.com>
[ 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@huawei.com>
Signed-off-by: Zou Wei <zou_wei@huawei.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/pwm/pwm-img.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pwm/pwm-img.c b/drivers/pwm/pwm-img.c
index 6faf5b5a5584..37200850cdc6 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;
--
2.30.2
next prev parent reply other threads:[~2021-07-10 23:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210710234915.3220342-1-sashal@kernel.org>
2021-07-10 23:48 ` [PATCH AUTOSEL 5.12 04/43] pwm: spear: Don't modify HW state in .remove callback Sasha Levin
2021-07-10 23:49 ` Sasha Levin [this message]
2021-07-10 23:49 ` [PATCH AUTOSEL 5.12 34/43] pwm: tegra: " Sasha Levin
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