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 <maxime.ripard@xxxxxxxxxxxxxxxxxx> --- drivers/dma/sun6i-dma.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c index 609c5d8cb947..63a1db38894e 100644 --- a/drivers/dma/sun6i-dma.c +++ b/drivers/dma/sun6i-dma.c @@ -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); -- 2.0.2 -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
