dmaengine: jz4740: disable/unprepare clk if probe fails

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

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

Fixes: 25ce6c35fea0 MIPS: jz4740: Remove custom DMA API
Signed-off-by: Tobias Jordan <Tobias.Jordan@elektrobit.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/dma-jz4740.c b/drivers/dma/dma-jz4740.c
index d50273fed715096ac625382f6c511f537da57bf4..afd5e10f8927cb0c5573bb946a48755aad58b0aa 100644 (file)
--- a/drivers/dma/dma-jz4740.c
+++ b/drivers/dma/dma-jz4740.c
@@ -555,7 +555,7 @@ 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);
@@ -568,6 +568,8 @@ 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;
 }