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From:   Yu Kuai <yukuai3@huawei.com>
To:     <vkoul@kernel.org>, <mcoquelin.stm32@gmail.com>,
        <alexandre.torgue@foss.st.com>, <michal.simek@xilinx.com>
CC:     <dmaengine@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <linux-stm32@st-md-mailman.stormreply.com>,
        <linux-arm-kernel@lists.infradead.org>, <yukuai3@huawei.com>,
        <yi.zhang@huawei.com>
Subject: [PATCH 2/3] dmaengine: usb-dmac: Fix PM reference leak in usb_dmac_probe()
Date:   Mon, 17 May 2021 16:18:25 +0800
Message-ID: <20210517081826.1564698-3-yukuai3@huawei.com>
In-Reply-To: <20210517081826.1564698-1-yukuai3@huawei.com>
References: <20210517081826.1564698-1-yukuai3@huawei.com>
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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@huawei.com>
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
---
 drivers/dma/sh/usb-dmac.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/sh/usb-dmac.c b/drivers/dma/sh/usb-dmac.c
index 8f7ceb698226..2a6c8fd8854e 100644
--- a/drivers/dma/sh/usb-dmac.c
+++ b/drivers/dma/sh/usb-dmac.c
@@ -796,7 +796,7 @@ static int usb_dmac_probe(struct platform_device *pdev)
 
 	/* Enable runtime PM and initialize the device. */
 	pm_runtime_enable(&pdev->dev);
-	ret = pm_runtime_get_sync(&pdev->dev);
+	ret = pm_runtime_resume_and_get(&pdev->dev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "runtime PM get sync failed (%d)\n", ret);
 		goto error_pm;
-- 
2.25.4