diff options
| author | Maxime Ripard <maxime.ripard@free-electrons.com> | 2014-07-30 10:30:22 +0200 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2014-07-30 15:44:17 +0200 |
| commit | 174427c1bb9e7810743f55a90a64da2c29d67b0b (patch) | |
| tree | 75b4834190524909ccec81820ac7d0174392f428 | |
| parent | dmaengine: sun6i: Remove switch statement from buswidth convertion routine (diff) | |
| download | linux-174427c1bb9e7810743f55a90a64da2c29d67b0b.tar.xz linux-174427c1bb9e7810743f55a90a64da2c29d67b0b.zip | |
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>
| -rw-r--r-- | drivers/dma/sun6i-dma.c | 4 |
1 files 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); |