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Staging: comedi: pcl812: Correct AI scan counting 

The AI scan counter should be updated after every completed scan,
not after every channel.  Keep track of current channel.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
hifive-unleashed-5.1
Ian Abbott 2010-01-20 13:04:44 +00:00 committed by Greg Kroah-Hartman
parent 6c381c5775
commit 7edfa10689
1 changed files with 6 additions and 2 deletions
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8
drivers/staging/comedi/drivers/pcl812.c
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@ -995,7 +995,9 @@ static irqreturn_t interrupt_pcl812_ai_int(int irq, void *d)
outb(0, dev->iobase + PCL812_CLRINT); /* clear INT request */
if (s->async->cur_chan == 0) { /* one scan done */
s->async->cur_chan++;
if (s->async->cur_chan >= devpriv->ai_n_chan) { /* one scan done */
s->async->cur_chan = 0;
devpriv->ai_act_scan++;
if (!(devpriv->ai_neverending))
if (devpriv->ai_act_scan >= devpriv->ai_scans) { /* all data sampled */
@ -1021,7 +1023,9 @@ static void transfer_from_dma_buf(struct comedi_device *dev,
for (i = len; i; i--) {
comedi_buf_put(s->async, ptr[bufptr++]); /* get one sample */
if (s->async->cur_chan == 0) {
s->async->cur_chan++;
if (s->async->cur_chan >= devpriv->ai_n_chan) {
s->async->cur_chan = 0;
devpriv->ai_act_scan++;
if (!devpriv->ai_neverending)
if (devpriv->ai_act_scan >= devpriv->ai_scans) { /* all data sampled */