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staging: comedi: das800: remove 'forever' from private data

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This member of the private data can be determined from the
cmd->stop_src. Do that instead.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2014-05-27 10:30:46 -07:00 committed by Greg Kroah-Hartman
parent 8ffffae6cf
commit 9dad12fe47
1 changed files with 9 additions and 10 deletions
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19
drivers/staging/comedi/drivers/das800.c
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@ -224,7 +224,6 @@ struct das800_private {
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 */
bool forever; /* flag that we should take data forever */
};
static void das800_ind_write(struct comedi_device *dev,
@ -290,7 +289,6 @@ static int das800_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
{
struct das800_private *devpriv = dev->private;
devpriv->forever = false;
devpriv->count = 0;
das800_disable(dev);
return 0;
@ -425,13 +423,10 @@ static int das800_ai_do_cmd(struct comedi_device *dev,
gain &= 0xf;
outb(gain, dev->iobase + DAS800_GAIN);
if (cmd->stop_src == TRIG_COUNT) {
if (cmd->stop_src == TRIG_COUNT)
devpriv->count = cmd->stop_arg * cmd->chanlist_len;
devpriv->forever = false;
} else { /* TRIG_NONE */
devpriv->forever = true;
else /* TRIG_NONE */
devpriv->count = 0;
}
/* enable auto channel scan, send interrupts on end of conversion
* and set clock source to internal or external
@ -467,7 +462,8 @@ static irqreturn_t das800_interrupt(int irq, void *d)
struct comedi_device *dev = d;
struct das800_private *devpriv = dev->private;
struct comedi_subdevice *s = dev->read_subdev;
struct comedi_async *async = s ? s->async : NULL;
struct comedi_async *async;
struct comedi_cmd *cmd;
unsigned long irq_flags;
unsigned int status;
unsigned int val;
@ -481,6 +477,9 @@ static irqreturn_t das800_interrupt(int irq, void *d)
if (!dev->attached)
return IRQ_HANDLED;
async = s->async;
cmd = &async->cmd;
spin_lock_irqsave(&dev->spinlock, irq_flags);
status = das800_ind_read(dev, CONTROL1) & STATUS2_HCEN;
/*
@ -512,7 +511,7 @@ static irqreturn_t das800_interrupt(int irq, void *d)
val >>= 4; /* 12-bit sample */
/* if there are more data points to collect */
if (devpriv->count > 0 || devpriv->forever) {
if (cmd->stop_src == TRIG_NONE || devpriv->count > 0) {
/* write data point to buffer */
cfc_write_to_buffer(s, val & s->maxdata);
devpriv->count--;
@ -527,7 +526,7 @@ static irqreturn_t das800_interrupt(int irq, void *d)
return IRQ_HANDLED;
}
if (devpriv->count > 0 || devpriv->forever) {
if (cmd->stop_src == TRIG_NONE || devpriv->count > 0) {
/* Re-enable card's interrupt.
* We already have spinlock, so indirect addressing is safe */
das800_ind_write(dev, CONTROL1_INTE | devpriv->do_bits,