linux-kernel - [PATCH -next] spi: qup: fix PM reference leak in spi_qup

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Date:   Fri, 9 Apr 2021 09:54:58 +0000
From:   Wang Li <wangli74@...wei.com>
To:     <broonie@...nel.org>, <bjorn.andersson@...aro.org>,
        <agross@...nel.org>
CC:     <linux-arm-msm@...r.kernel.org>, <linux-spi@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Wang Li <wangli74@...wei.com>
Subject: [PATCH -next] spi: qup: fix PM reference leak in spi_qup_remove()

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>
---
 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 8dcb2e70735c..d39dec6d1c91 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;
 
-- 
2.17.1