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dmaengine: sun6i: Free the interrupt before killing the tasklet

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There's still a small window between the call to sun6i_kill_tasklet and the end
of the driver remove function where a spurious interrupt might trigger, and
start using deallocated resources.

Replace the call to synchronize_irq by a free_irq, so that we're sure that we
won't get any further interrupts when we're deallocating resources.

Signed-off-by: Maxime Ripard <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
This commit is contained in:
Maxime Ripard 2014-07-30 10:30:22 +02:00 • committed by Vinod Koul
commit 174427c1bb
1 changed files with 2 additions and 2 deletions
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4
drivers/dma/sun6i-dma.c
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@ -836,8 +836,8 @@ static inline void sun6i_kill_tasklet(struct sun6i_dma_dev *sdev)
/* Prevent spurious interrupts from scheduling the tasklet */
atomic_inc(&sdev->tasklet_shutdown);
/* Make sure all interrupts are handled */
synchronize_irq(sdev->irq);
/* Make sure we won't have any further interrupts */
devm_free_irq(sdev->slave.dev, sdev->irq, sdev);
/* Actually prevent the tasklet from being scheduled */
tasklet_kill(&sdev->task);