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    Subject[PATCH 4.4 057/193] dmaengine: jz4740: disable/unprepare clk if probe fails
    Date
    4.4-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Tobias Jordan <Tobias.Jordan@elektrobit.com>


    [ 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: 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>
    Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/dma/dma-jz4740.c | 4 +++-
    1 file changed, 3 insertions(+), 1 deletion(-)

    --- a/drivers/dma/dma-jz4740.c
    +++ b/drivers/dma/dma-jz4740.c
    @@ -557,7 +557,7 @@ static int jz4740_dma_probe(struct platf

    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 platf

    err_unregister:
    dma_async_device_unregister(dd);
    +err_clk:
    + clk_disable_unprepare(dmadev->clk);
    return ret;
    }


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