diff options
| -rw-r--r-- | drivers/staging/comedi/drivers/das800.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/drivers/staging/comedi/drivers/das800.c b/drivers/staging/comedi/drivers/das800.c index 1e2e3d56d9f..6f7f8d531dd 100644 --- a/drivers/staging/comedi/drivers/das800.c +++ b/drivers/staging/comedi/drivers/das800.c @@ -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, |