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

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Message-Id: <20200522045335.30556-1-dinghao.liu@zju.edu.cn>
Date:   Fri, 22 May 2020 12:53:31 +0800
From:   Dinghao Liu <dinghao.liu@....edu.cn>
To:     dinghao.liu@....edu.cn, kjlu@....edu
Cc:     Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] scsi: ufs: Fix runtime PM imbalance on error

When devm_clk_get() returns an error code, a pairing
runtime PM usage counter decrement is needed to keep
the counter balanced.

Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
---
 drivers/scsi/ufs/ti-j721e-ufs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/ufs/ti-j721e-ufs.c b/drivers/scsi/ufs/ti-j721e-ufs.c
index 5216d228cdd9..f3f212f6f9a9 100644
--- a/drivers/scsi/ufs/ti-j721e-ufs.c
+++ b/drivers/scsi/ufs/ti-j721e-ufs.c
@@ -39,6 +39,7 @@ static int ti_j721e_ufs_probe(struct platform_device *pdev)
 	clk = devm_clk_get(dev, NULL);
 	if (IS_ERR(clk)) {
 		dev_err(dev, "Cannot claim MPHY clock.\n");
+		pm_runtime_put_sync(dev);
 		return PTR_ERR(clk);
 	}
 	clk_rate = clk_get_rate(clk);
-- 
2.17.1