linux-kernel - [PATCH] sata_rcar: Fix runtime PM imbalance on error

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Message-Id: <20200521085825.2098-1-dinghao.liu@zju.edu.cn>
Date:   Thu, 21 May 2020 16:58:25 +0800
From:   Dinghao Liu <dinghao.liu@....edu.cn>
To:     dinghao.liu@....edu.cn, kjlu@....edu
Cc:     Jens Axboe <axboe@...nel.dk>, linux-ide@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] sata_rcar: Fix runtime PM imbalance on error

pm_runtime_get_sync() increments the runtime PM usage counter even
when 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/ata/sata_rcar.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/ata/sata_rcar.c b/drivers/ata/sata_rcar.c
index 980aacdbcf3b..cfa0e732dfd0 100644
--- a/drivers/ata/sata_rcar.c
+++ b/drivers/ata/sata_rcar.c
@@ -907,7 +907,7 @@ static int sata_rcar_probe(struct platform_device *pdev)
 	pm_runtime_enable(dev);
 	ret = pm_runtime_get_sync(dev);
 	if (ret < 0)
-		goto err_pm_disable;
+		goto err_pm_put;
 
 	host = ata_host_alloc(dev, 1);
 	if (!host) {
@@ -937,7 +937,6 @@ static int sata_rcar_probe(struct platform_device *pdev)
 
 err_pm_put:
 	pm_runtime_put(dev);
-err_pm_disable:
 	pm_runtime_disable(dev);
 	return ret;
 }
-- 
2.17.1