From 5181886e781d0abf58b6f229c205238f17ec788b Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Mon, 9 Dec 2013 15:31:16 -0700 Subject: [PATCH] staging: comedi: pcmmio: only hook up async command support if irq is available Refactor the board attach so that the async commands support is only hooked up if the irq is actually available. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/pcmmio.c | 39 ++++++++++++------------- 1 file changed, 18 insertions(+), 21 deletions(-) diff --git a/drivers/staging/comedi/drivers/pcmmio.c b/drivers/staging/comedi/drivers/pcmmio.c index 055781dc7875..a5b81ef2771f 100644 --- a/drivers/staging/comedi/drivers/pcmmio.c +++ b/drivers/staging/comedi/drivers/pcmmio.c @@ -807,6 +807,16 @@ static int pcmmio_attach(struct comedi_device *dev, struct comedi_devconfig *it) return -ENOMEM; spin_lock_init(&devpriv->pagelock); + spin_lock_init(&devpriv->spinlock); + + pcmmio_reset(dev); + + if (it->options[1]) { + ret = request_irq(it->options[1], interrupt_pcmmio, 0, + dev->board_name, dev); + if (ret == 0) + dev->irq = it->options[1]; + } ret = comedi_alloc_subdevices(dev, 4); if (ret) @@ -851,18 +861,14 @@ static int pcmmio_attach(struct comedi_device *dev, struct comedi_devconfig *it) s->range_table = &range_digital; s->insn_bits = pcmmio_dio_insn_bits; s->insn_config = pcmmio_dio_insn_config; - - dev->read_subdev = s; - s->subdev_flags |= SDF_CMD_READ; - s->len_chanlist = s->n_chan; - s->cancel = pcmmio_cancel; - s->do_cmd = pcmmio_cmd; - s->do_cmdtest = pcmmio_cmdtest; - - devpriv->active = 0; - devpriv->stop_count = 0; - - spin_lock_init(&devpriv->spinlock); + if (dev->irq) { + dev->read_subdev = s; + s->subdev_flags |= SDF_CMD_READ; + s->len_chanlist = s->n_chan; + s->cancel = pcmmio_cancel; + s->do_cmd = pcmmio_cmd; + s->do_cmdtest = pcmmio_cmdtest; + } /* Digital I/O subdevice */ s = &dev->subdevices[3]; @@ -874,15 +880,6 @@ static int pcmmio_attach(struct comedi_device *dev, struct comedi_devconfig *it) s->insn_bits = pcmmio_dio_insn_bits; s->insn_config = pcmmio_dio_insn_config; - pcmmio_reset(dev); - - if (it->options[1]) { - ret = request_irq(it->options[1], interrupt_pcmmio, 0, - dev->board_name, dev); - if (ret == 0) - dev->irq = it->options[1]; - } - return 1; } -- 2.30.2