From cec9cfa8d88c8b2ad0789e8441ff98c3f52b8142 Mon Sep 17 00:00:00 2001 From: Vinod Koul Date: Sat, 2 Jul 2016 14:48:02 +0530 Subject: [PATCH] dmaengine: jz4740: kill the tasklets upon exit drivers should ensure that tasklets are killed, so that they can't be executed after driver remove is executed, so ensure they are killed. This driver used vchan tasklets, so those need to be killed. Signed-off-by: Vinod Koul Acked-by: Lars-Peter Clausen --- drivers/dma/dma-jz4740.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/dma/dma-jz4740.c b/drivers/dma/dma-jz4740.c index 7638b24ce8d0..9689b36c005a 100644 --- a/drivers/dma/dma-jz4740.c +++ b/drivers/dma/dma-jz4740.c @@ -573,12 +573,26 @@ static int jz4740_dma_probe(struct platform_device *pdev) return ret; } +static void jz4740_cleanup_vchan(struct dma_device *dmadev) +{ + struct jz4740_dmaengine_chan *chan, *_chan; + + list_for_each_entry_safe(chan, _chan, + &dmadev->channels, vchan.chan.device_node) { + list_del(&chan->vchan.chan.device_node); + tasklet_kill(&chan->vchan.task); + } +} + + static int jz4740_dma_remove(struct platform_device *pdev) { struct jz4740_dma_dev *dmadev = platform_get_drvdata(pdev); int irq = platform_get_irq(pdev, 0); free_irq(irq, dmadev); + + jz4740_cleanup_vchan(&dmadev->ddev); dma_async_device_unregister(&dmadev->ddev); clk_disable_unprepare(dmadev->clk);