[PATCH] dma: mmp_tdma: kill tasklet when free dma channel

From: Qiao Zhou
Date: Fri Jun 07 2013 - 07:42:52 EST


kill tasklet task when free dam channel, otherwise the task may
run after related resource is released, then unknown things may
happen.

Signed-off-by: Qiao Zhou <zhouqiao@xxxxxxxxxxx>
---
drivers/dma/mmp_tdma.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/dma/mmp_tdma.c b/drivers/dma/mmp_tdma.c
index 43d5a6c..2622b2a 100644
--- a/drivers/dma/mmp_tdma.c
+++ b/drivers/dma/mmp_tdma.c
@@ -333,6 +333,9 @@ static void mmp_tdma_free_chan_resources(struct dma_chan *chan)

if (tdmac->irq)
devm_free_irq(tdmac->dev, tdmac->irq, tdmac);
+
+ tasklet_kill(&tdmac->tasklet);
+
mmp_tdma_free_descriptor(tdmac);
return;
}
--
1.7.0.4

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