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authorVinod Koul <vinod.koul@intel.com>2016-07-02 12:18:02 +0300
committerVinod Koul <vinod.koul@intel.com>2016-07-16 17:49:00 +0300
commitcec9cfa8d88c8b2ad0789e8441ff98c3f52b8142 (patch)
treed5f3cef5c52641b88934074b2ec14fb26748f494 /drivers/dma/dma-jz4740.c
parentf950f025364ad3ad4834cd1058737f272b2cc665 (diff)
downloadlinux-cec9cfa8d88c8b2ad0789e8441ff98c3f52b8142.tar.xz
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>
Diffstat (limited to 'drivers/dma/dma-jz4740.c')
-rw-r--r--drivers/dma/dma-jz4740.c14
1 files changed, 14 insertions, 0 deletions
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 @@ err_unregister:
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);