linux-kernel - [PATCH] power: supply: bq24190_charger: fix runtime pm imbalance

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Message-Id: <20200520074309.19366-1-dinghao.liu@zju.edu.cn>
Date:   Wed, 20 May 2020 15:43:09 +0800
From:   Dinghao Liu <dinghao.liu@....edu.cn>
To:     dinghao.liu@....edu.cn, kjlu@....edu
Cc:     Sebastian Reichel <sre@...nel.org>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] power: supply: bq24190_charger: fix runtime pm imbalance

pm_runtime_get_sync() increments the runtime PM usage counter even
it returns an error code. Thus a pairing decrement is needed on
the error handling path to keep the counter balanced.

Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
---
 drivers/power/supply/bq24190_charger.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
index 453d6332d43a..4f7c6b6abb56 100644
--- a/drivers/power/supply/bq24190_charger.c
+++ b/drivers/power/supply/bq24190_charger.c
@@ -481,8 +481,10 @@ static ssize_t bq24190_sysfs_store(struct device *dev,
 		return ret;
 
 	ret = pm_runtime_get_sync(bdi->dev);
-	if (ret < 0)
+	if (ret < 0) {
+		pm_runtime_put_autosuspend(bdi->dev);
 		return ret;
+	}
 
 	ret = bq24190_write_mask(bdi, info->reg, info->mask, info->shift, v);
 	if (ret)
-- 
2.17.1