The irq is only needed to support async commands. Tidy up the
code that does the request_irq() and remove the noise.
Only hookup the subdevice command support if the irq is available.
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/ni_at_a2150.c | 45 +++++++++++++---------------
1 file changed, 21 insertions(+), 24 deletions(-)
diff --git a/drivers/staging/comedi/drivers/ni_at_a2150.c
b/drivers/staging/comedi/drivers/ni_at_a2150.c
index cc69dde..8924fbd 100644
--- a/drivers/staging/comedi/drivers/ni_at_a2150.c
+++ b/drivers/staging/comedi/drivers/ni_at_a2150.c
@@ -689,7 +689,6 @@ static int a2150_attach(struct comedi_device *dev, struct
comedi_devconfig *it)
const struct a2150_board *thisboard = comedi_board(dev);
struct a2150_private *devpriv;
struct comedi_subdevice *s;
- unsigned int irq = it->options[1];
unsigned int dma = it->options[2];
static const int timeout = 2000;
int i;
@@ -703,21 +702,20 @@ static int a2150_attach(struct comedi_device *dev, struct
comedi_devconfig *it)
if (ret)
return ret;
- /* grab our IRQ */
- if (irq) {
- /* check that irq is supported */
- if (irq < 3 || irq == 8 || irq == 13 || irq > 15) {
- printk(" invalid irq line %u\n", irq);
- return -EINVAL;
- }
- if (request_irq(irq, a2150_interrupt, 0,
- dev->driver->driver_name, dev)) {
- printk("unable to allocate irq %u\n", irq);
- return -EINVAL;
+ dev->board_ptr = a2150_boards + a2150_probe(dev);
+ thisboard = comedi_board(dev);
+ dev->board_name = thisboard->name;
+
+ /* only irqs 3, 4, 5, 6, 7, 9, 10, 11, 12, 14 and 15 are valid */
+ if ((1 << it->options[1]) & 0xdef8) {
+ ret = request_irq(it->options[1], a2150_interrupt, 0,
+ dev->board_name, dev);
+ if (ret == 0) {
+ dev->irq = it->options[1];
+ devpriv->irq_dma_bits |= IRQ_LVL_BITS(dev->irq);
}
- devpriv->irq_dma_bits |= IRQ_LVL_BITS(irq);
- dev->irq = irq;
}
+
/* initialize dma */
if (dma) {
if (dma == 4 || dma > 7) {
@@ -740,27 +738,26 @@ static int a2150_attach(struct comedi_device *dev, struct
comedi_devconfig *it)
devpriv->irq_dma_bits |= DMA_CHAN_BITS(dma);
}
- dev->board_ptr = a2150_boards + a2150_probe(dev);
- thisboard = comedi_board(dev);
- dev->board_name = thisboard->name;
-
ret = comedi_alloc_subdevices(dev, 1);
if (ret)
return ret;
/* analog input subdevice */
s = &dev->subdevices[0];
- dev->read_subdev = s;
s->type = COMEDI_SUBD_AI;
- s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_OTHER | SDF_CMD_READ;
+ s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_OTHER;
s->n_chan = 4;
- s->len_chanlist = 4;
s->maxdata = 0xffff;
s->range_table = &range_a2150;
- s->do_cmd = a2150_ai_cmd;
- s->do_cmdtest = a2150_ai_cmdtest;
s->insn_read = a2150_ai_rinsn;
- s->cancel = a2150_cancel;
+ if (dev->irq) {
+ dev->read_subdev = s;
+ s->subdev_flags |= SDF_CMD_READ;
+ s->len_chanlist = 4;
+ s->do_cmd = a2150_ai_cmd;
+ s->do_cmdtest = a2150_ai_cmdtest;
+ s->cancel = a2150_cancel;
+ }
/* need to do this for software counting of completed conversions, to
* prevent hardware count from stopping acquisition */
--
1.8.4.4
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