Remove the private data member 'count' and use the comedi_async 'scans_done'
member to detect the end-of-acquisition.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/das800.c | 31 ++++++++++++-------------------
1 file changed, 12 insertions(+), 19 deletions(-)
diff --git a/drivers/staging/comedi/drivers/das800.c
b/drivers/staging/comedi/drivers/das800.c
index 55bc494..e5bdc24 100644
--- a/drivers/staging/comedi/drivers/das800.c
+++ b/drivers/staging/comedi/drivers/das800.c
@@ -219,7 +219,6 @@ static const struct das800_board das800_boards[] = {
};
struct das800_private {
- unsigned int count; /* number of data points left to be taken */
unsigned int divisor1; /* counter 1 value for timed conversions */
unsigned int divisor2; /* counter 2 value for timed conversions */
unsigned int do_bits; /* digital output bits */
@@ -286,9 +285,6 @@ static void das800_set_frequency(struct comedi_device *dev)
static int das800_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
{
- struct das800_private *devpriv = dev->private;
-
- devpriv->count = 0;
das800_disable(dev);
return 0;
}
@@ -399,7 +395,6 @@ static int das800_ai_do_cmd(struct comedi_device *dev,
struct comedi_subdevice *s)
{
const struct das800_board *thisboard = dev->board_ptr;
- struct das800_private *devpriv = dev->private;
struct comedi_async *async = s->async;
struct comedi_cmd *cmd = &async->cmd;
unsigned int gain = CR_RANGE(cmd->chanlist[0]);
@@ -422,11 +417,6 @@ static int das800_ai_do_cmd(struct comedi_device *dev,
gain &= 0xf;
outb(gain, dev->iobase + DAS800_GAIN);
- if (cmd->stop_src == TRIG_COUNT)
- devpriv->count = cmd->stop_arg * cmd->chanlist_len;
- else /* TRIG_NONE */
- devpriv->count = 0;
-
/* enable auto channel scan, send interrupts on end of conversion
* and set clock source to internal or external
*/
@@ -509,11 +499,13 @@ static irqreturn_t das800_interrupt(int irq, void *d)
if (s->maxdata == 0x0fff)
val >>= 4; /* 12-bit sample */
- /* if there are more data points to collect */
- if (cmd->stop_src == TRIG_NONE || devpriv->count > 0) {
- val &= s->maxdata;
- comedi_buf_write_samples(s, &val, 1);
- devpriv->count--;
+ val &= s->maxdata;
+ comedi_buf_write_samples(s, &val, 1);
+
+ if (cmd->stop_src == TRIG_COUNT &&
+ async->scans_done >= cmd->stop_arg) {
+ async->events |= COMEDI_CB_EOA;
+ break;
}
}
@@ -524,9 +516,11 @@ static irqreturn_t das800_interrupt(int irq, void *d)
return IRQ_HANDLED;
}
- if (cmd->stop_src == TRIG_NONE || devpriv->count > 0) {
- /* Re-enable card's interrupt.
- * We already have spinlock, so indirect addressing is safe */
+ if (!(async->events & COMEDI_CB_CANCEL_MASK)) {
+ /*
+ * Re-enable card's interrupt.
+ * We already have spinlock, so indirect addressing is safe
+ */
das800_ind_write(dev, CONTROL1_INTE | devpriv->do_bits,
CONTROL1);
spin_unlock_irqrestore(&dev->spinlock, irq_flags);
@@ -534,7 +528,6 @@ static irqreturn_t das800_interrupt(int irq, void *d)
/* otherwise, stop taking data */
spin_unlock_irqrestore(&dev->spinlock, irq_flags);
das800_disable(dev);
- async->events |= COMEDI_CB_EOA;
}
comedi_handle_events(dev, s);
return IRQ_HANDLED;
--
2.0.3
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