linux-kernel - [PATCH AUTOSEL 5.4 23/34] spi: qup: fix PM reference leak in spi_qup

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Message-Id: <20210502140434.2719553-23-sashal@kernel.org>
Date:   Sun,  2 May 2021 10:04:23 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Wang Li <wangli74@...wei.com>, Hulk Robot <hulkci@...wei.com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>, linux-arm-msm@...r.kernel.org,
        linux-spi@...r.kernel.org
Subject: [PATCH AUTOSEL 5.4 23/34] spi: qup: fix PM reference leak in spi_qup_remove()

From: Wang Li <wangli74@...wei.com>

[ Upstream commit cec77e0a249892ceb10061bf17b63f9fb111d870 ]

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@...wei.com>
Signed-off-by: Wang Li <wangli74@...wei.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Link: https://lore.kernel.org/r/20210409095458.29921-1-wangli74@huawei.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/spi/spi-qup.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index fa8079fbea77..d1dfb52008b4 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -1263,7 +1263,7 @@ static int spi_qup_remove(struct platform_device *pdev)
 	struct spi_qup *controller = spi_master_get_devdata(master);
 	int ret;
 
-	ret = pm_runtime_get_sync(&pdev->dev);
+	ret = pm_runtime_resume_and_get(&pdev->dev);
 	if (ret < 0)
 		return ret;
 
-- 
2.30.2