From 7edfa10689615255e65909bb893fd8f8620cff92 Mon Sep 17 00:00:00 2001 From: Ian Abbott Date: Wed, 20 Jan 2010 13:04:44 +0000 Subject: [PATCH] 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 Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/pcl812.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/staging/comedi/drivers/pcl812.c b/drivers/staging/comedi/drivers/pcl812.c index 0a5bc3d6da8c..aa912735ddba 100644 --- a/drivers/staging/comedi/drivers/pcl812.c +++ b/drivers/staging/comedi/drivers/pcl812.c @@ -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 */ -- 2.20.1