dmaengine: sun6i: Free the interrupt before killing the tasklet
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@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index 609c5d8..63a1db3 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -836,8 +836,8 @@
/* 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);