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dmaengine: edma: kill the tasklets upon exit

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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 <[email protected]>
Acked-by: Peter Ujfalusi <[email protected]>
This commit is contained in:
Vinod Koul 2016-07-01 13:51:41 +05:30
commit f4e0628ba3
1 changed files with 13 additions and 0 deletions
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13
drivers/dma/edma.c
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@ -2393,6 +2393,17 @@ err_reg1:
return ret;
}
static void edma_cleanupp_vchan(struct dma_device *dmadev)
{
struct edma_chan *echan, *_echan;
list_for_each_entry_safe(echan, _echan,
&dmadev->channels, vchan.chan.device_node) {
list_del(&echan->vchan.chan.device_node);
tasklet_kill(&echan->vchan.task);
}
}
static int edma_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@ -2401,6 +2412,8 @@ static int edma_remove(struct platform_device *pdev)
devm_free_irq(dev, ecc->ccint, ecc);
devm_free_irq(dev, ecc->ccerrint, ecc);
edma_cleanupp_vchan(&ecc->dma_slave);
if (dev->of_node)
of_dma_controller_free(dev->of_node);
dma_async_device_unregister(&ecc->dma_slave);