diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/das16.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/das16.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/drivers/staging/comedi/drivers/das16.c b/drivers/staging/comedi/drivers/das16.c index 5d157951f63f..ddd4aeab6365 100644 --- a/drivers/staging/comedi/drivers/das16.c +++ b/drivers/staging/comedi/drivers/das16.c @@ -440,6 +440,7 @@ static inline int timer_period(void) struct das16_private_struct { struct comedi_isadma *dma; + struct comedi_device *dev; unsigned int clockbase; unsigned int ctrl_reg; unsigned int divisor1; @@ -525,10 +526,10 @@ static void das16_interrupt(struct comedi_device *dev) comedi_handle_events(dev, s); } -static void das16_timer_interrupt(unsigned long arg) +static void das16_timer_interrupt(struct timer_list *t) { - struct comedi_device *dev = (struct comedi_device *)arg; - struct das16_private_struct *devpriv = dev->private; + struct das16_private_struct *devpriv = from_timer(devpriv, t, timer); + struct comedi_device *dev = devpriv->dev; unsigned long flags; das16_interrupt(dev); @@ -934,6 +935,8 @@ static void das16_alloc_dma(struct comedi_device *dev, unsigned int dma_chan) { struct das16_private_struct *devpriv = dev->private; + timer_setup(&devpriv->timer, das16_timer_interrupt, 0); + /* only DMA channels 3 and 1 are valid */ if (!(dma_chan == 1 || dma_chan == 3)) return; @@ -941,10 +944,6 @@ static void das16_alloc_dma(struct comedi_device *dev, unsigned int dma_chan) /* DMA uses two buffers */ devpriv->dma = comedi_isadma_alloc(dev, 2, dma_chan, dma_chan, DAS16_DMA_SIZE, COMEDI_ISADMA_READ); - if (devpriv->dma) { - setup_timer(&devpriv->timer, das16_timer_interrupt, - (unsigned long)dev); - } } static void das16_free_dma(struct comedi_device *dev) @@ -952,8 +951,7 @@ static void das16_free_dma(struct comedi_device *dev) struct das16_private_struct *devpriv = dev->private; if (devpriv) { - if (devpriv->timer.data) - del_timer_sync(&devpriv->timer); + del_timer_sync(&devpriv->timer); comedi_isadma_free(devpriv->dma); } } @@ -1046,6 +1044,7 @@ static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it) devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); if (!devpriv) return -ENOMEM; + devpriv->dev = dev; if (board->size < 0x400) { ret = comedi_request_region(dev, it->options[0], board->size); |