From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Yu Kuai <yukuai3@huawei.com>, Hulk Robot <hulkci@huawei.com>,
Vinod Koul <vkoul@kernel.org>, Sasha Levin <sashal@kernel.org>,
dmaengine@vger.kernel.org
Subject: [PATCH AUTOSEL 4.14 01/10] dmaengine: usb-dmac: Fix PM reference leak in usb_dmac_probe()
Date: Tue, 10 Aug 2021 10:16:32 -0400 [thread overview]
Message-ID: <20210810141641.3118360-1-sashal@kernel.org> (raw)
From: Yu Kuai <yukuai3@huawei.com>
[ Upstream commit 1da569fa7ec8cb0591c74aa3050d4ea1397778b4 ]
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 moving the error_pm label above the pm_runtime_put() in
the error path.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20210706124521.1371901-1-yukuai3@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 31a145154e9f..744fab9da918 100644
--- a/drivers/dma/sh/usb-dmac.c
+++ b/drivers/dma/sh/usb-dmac.c
@@ -858,8 +858,8 @@ static int usb_dmac_probe(struct platform_device *pdev)
error:
of_dma_controller_free(pdev->dev.of_node);
- pm_runtime_put(&pdev->dev);
error_pm:
+ pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
return ret;
}
--
2.30.2
next reply other threads:[~2021-08-10 14:20 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-10 14:16 Sasha Levin [this message]
2021-08-10 14:16 ` [PATCH AUTOSEL 4.14 03/10] dmaengine: of-dma: router_xlate to return -EPROBE_DEFER if controller is not yet available Sasha Levin
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