diff options
| -rw-r--r-- | drivers/staging/comedi/drivers/adl_pci9118.c | 24 |
1 files changed, 7 insertions, 17 deletions
diff --git a/drivers/staging/comedi/drivers/adl_pci9118.c b/drivers/staging/comedi/drivers/adl_pci9118.c index 971235402289..b527748658f0 100644 --- a/drivers/staging/comedi/drivers/adl_pci9118.c +++ b/drivers/staging/comedi/drivers/adl_pci9118.c @@ -471,15 +471,6 @@ static unsigned int defragment_dma_buffer(struct comedi_device *dev, return j; } -static void move_block_from_dma(struct comedi_device *dev, - struct comedi_subdevice *s, - unsigned short *dma_buffer, - unsigned int num_samples) -{ - num_samples = defragment_dma_buffer(dev, s, dma_buffer, num_samples); - comedi_buf_write_samples(s, dma_buffer, num_samples); -} - static void pci9118_exttrg_enable(struct comedi_device *dev, bool enable) { struct pci9118_private *devpriv = dev->private; @@ -616,9 +607,10 @@ static void interrupt_pci9118_ai_dma(struct comedi_device *dev, struct pci9118_private *devpriv = dev->private; struct comedi_cmd *cmd = &s->async->cmd; struct pci9118_dmabuf *dmabuf = &devpriv->dmabuf[devpriv->dma_actbuf]; - unsigned int next_dma_buf, samplesinbuf, sampls, m; + unsigned int nsamples; + unsigned int next_dma_buf; - samplesinbuf = dmabuf->use_size >> 1; /* number of received samples */ + nsamples = dmabuf->use_size >> 1; /* number of received samples */ if (devpriv->dma_doublebuf) { /* * switch DMA buffers if is used @@ -630,12 +622,10 @@ static void interrupt_pci9118_ai_dma(struct comedi_device *dev, interrupt_pci9118_ai_mode4_switch(dev, next_dma_buf); } - if (samplesinbuf) { - /* how many samples is to end of buffer */ - m = s->async->prealloc_bufsz >> 1; - sampls = m; - move_block_from_dma(dev, s, dmabuf->virt, samplesinbuf); - m = m - sampls; /* m=how many samples was transferred */ + if (nsamples) { + nsamples = defragment_dma_buffer(dev, s, dmabuf->virt, + nsamples); + comedi_buf_write_samples(s, dmabuf->virt, nsamples); } if (!devpriv->ai_neverending) { |