Interrupt support is optional with this driver. Only hook up the async command support for the analog input subdevice if the user requested an interrupt when attaching to the board. This also allows removing the extra test in das800_ai_do_cmd().
For aesthetic reasons, add some whitespace to the subdevice init. Signed-off-by: H Hartley Sweeten <[email protected]> Cc: Ian Abbott <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> --- drivers/staging/comedi/drivers/das800.c | 29 +++++++++++++---------------- 1 file changed, 13 insertions(+), 16 deletions(-) diff --git a/drivers/staging/comedi/drivers/das800.c b/drivers/staging/comedi/drivers/das800.c index 3711f81..78e913e 100644 --- a/drivers/staging/comedi/drivers/das800.c +++ b/drivers/staging/comedi/drivers/das800.c @@ -412,12 +412,6 @@ static int das800_ai_do_cmd(struct comedi_device *dev, unsigned long irq_flags; struct comedi_async *async = s->async; - if (!dev->irq) { - comedi_error(dev, - "no irq assigned for das-800, cannot do hardware conversions"); - return -1; - } - disable_das800(dev); /* set channel scan limits */ @@ -767,16 +761,19 @@ static int das800_attach(struct comedi_device *dev, struct comedi_devconfig *it) /* analog input subdevice */ s = &dev->subdevices[0]; dev->read_subdev = s; - s->type = COMEDI_SUBD_AI; - s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ; - s->n_chan = 8; - s->len_chanlist = 8; - s->maxdata = (1 << thisboard->resolution) - 1; - s->range_table = thisboard->ai_range; - s->do_cmd = das800_ai_do_cmd; - s->do_cmdtest = das800_ai_do_cmdtest; - s->insn_read = das800_ai_rinsn; - s->cancel = das800_cancel; + s->type = COMEDI_SUBD_AI; + s->subdev_flags = SDF_READABLE | SDF_GROUND; + s->n_chan = 8; + s->maxdata = (1 << thisboard->resolution) - 1; + s->range_table = thisboard->ai_range; + s->insn_read = das800_ai_rinsn; + if (dev->irq) { + s->subdev_flags |= SDF_CMD_READ; + s->len_chanlist = 8; + s->do_cmdtest = das800_ai_do_cmdtest; + s->do_cmd = das800_ai_do_cmd; + s->cancel = das800_cancel; + } /* di */ s = &dev->subdevices[1]; -- 1.8.1.4 _______________________________________________ devel mailing list [email protected] http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
