don't re-enable ai dma after it's finished

diff --git a/comedi/drivers/dt282x.c b/comedi/drivers/dt282x.c
index f5a971a857b93d1c7076801cb53ecc18860ec575..53b9afdbb0a2585c50de8deb4c5e50b52bd9b4b0 100644 (file)
--- a/comedi/drivers/dt282x.c
+++ b/comedi/drivers/dt282x.c
@@ -438,7 +438,6 @@ static void dt282x_ao_dma_interrupt(comedi_device * dev)
        comedi_buf_memcpy_from(s->async, 0, ptr, size);
        comedi_buf_read_free(s->async, size);
        prep_ao_dma(dev,i,size);
-       enable_dma(devpriv->dma[i].chan);
 
        comedi_event(dev,s,s->async->events);
        return;
@@ -502,8 +501,6 @@ static void dt282x_ai_dma_interrupt(comedi_device * dev)
        /* restart the channel */
        prep_ai_dma(dev,i,0);
 
-       enable_dma(devpriv->dma[i].chan);
-
        comedi_event(dev,s,s->async->events);
 }
 
@@ -533,6 +530,8 @@ static int prep_ai_dma(comedi_device * dev,int chan,int n)
        set_dma_count(dma_chan, n);
        release_dma_lock(flags);
 
+       enable_dma(dma_chan);
+
        return n;
 }
 
@@ -553,6 +552,8 @@ static int prep_ao_dma(comedi_device * dev,int chan,int n)
        set_dma_count(dma_chan, n );
        release_dma_lock(flags);
 
+       enable_dma(dma_chan);
+
        return n;
 }
 
@@ -794,10 +795,8 @@ static int dt282x_ai_cmd(comedi_device * dev, comedi_subdevice * s)
        devpriv->dma_dir=DMA_MODE_READ;
        devpriv->current_dma_chan=0;
        prep_ai_dma(dev,0,0);
-       enable_dma(devpriv->dma[0].chan);
        if(devpriv->ntrig){
                prep_ai_dma(dev,1,0);
-               enable_dma(devpriv->dma[1].chan);
                devpriv->supcsr |= DT2821_DDMA;
                update_supcsr(0);
        }
@@ -1012,7 +1011,6 @@ static int dt282x_ao_inttrig(comedi_device *dev,comedi_subdevice *s,
        comedi_buf_memcpy_from(s->async, 0, devpriv->dma[0].buf, size);
        comedi_buf_read_free(s->async, size);
        prep_ao_dma(dev,0,size);
-       enable_dma(devpriv->dma[0].chan);
 
        size = comedi_buf_read_n_available(s->async);
        if(size>devpriv->dma_maxsize)size=devpriv->dma_maxsize;
@@ -1023,7 +1021,6 @@ static int dt282x_ao_inttrig(comedi_device *dev,comedi_subdevice *s,
        comedi_buf_memcpy_from(s->async, 0, devpriv->dma[1].buf, size);
        comedi_buf_read_free(s->async, size);
        prep_ao_dma(dev,1,size);
-       enable_dma(devpriv->dma[1].chan);
 
        update_supcsr(DT2821_STRIG);
        s->async->inttrig=NULL;