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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 <vinod.koul@intel.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
This commit is contained in:
Vinod Koul 2016-07-02 14:48:02 +05:30
parent f950f02536
commit cec9cfa8d8
1 changed files with 14 additions and 0 deletions
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14
drivers/dma/dma-jz4740.c
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@ -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);