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dmaengine: jz4740: disable/unprepare clk if probe fails

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[ Upstream commit eb9436966fdc84cebdf222952a99898ab46d9bb0 ]

in error path of jz4740_dma_probe(), call clk_disable_unprepare() to clean
up.

Found by Linux Driver Verification project (linuxtesting.org).

Fixes: 25ce6c35fe MIPS: jz4740: Remove custom DMA API
Signed-off-by: Tobias Jordan <Tobias.Jordan@elektrobit.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tobias Jordan 2017-12-06 14:28:27 +01:00 committed by Greg Kroah-Hartman
parent b22c361ea9
commit 884438152f
1 changed files with 3 additions and 1 deletions
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4
drivers/dma/dma-jz4740.c
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@ -557,7 +557,7 @@ static int jz4740_dma_probe(struct platform_device *pdev)
ret = dma_async_device_register(dd);
if (ret)
return ret;
goto err_clk;
irq = platform_get_irq(pdev, 0);
ret = request_irq(irq, jz4740_dma_irq, 0, dev_name(&pdev->dev), dmadev);
@ -570,6 +570,8 @@ static int jz4740_dma_probe(struct platform_device *pdev)
err_unregister:
dma_async_device_unregister(dd);
err_clk:
clk_disable_unprepare(dmadev->clk);
return ret;
}