This is a note to let you know that I've just added the patch titled
dmaengine: jz4740: disable/unprepare clk if probe fails
to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: dmaengine-jz4740-disable-unprepare-clk-if-probe-fails.patch and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Fri Feb 23 11:58:50 CET 2018
From: Tobias Jordan Tobias.Jordan@elektrobit.com Date: Wed, 6 Dec 2017 14:28:27 +0100 Subject: dmaengine: jz4740: disable/unprepare clk if probe fails
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; }
Patches currently in stable-queue which might be from Tobias.Jordan@elektrobit.com are
queue-4.4/dmaengine-jz4740-disable-unprepare-clk-if-probe-fails.patch