From 67fb892cc14aa3159aa68cbda2bd6cc30e2e7fd8 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Thu, 5 Dec 2013 13:43:35 -0700 Subject: [PATCH] staging: comedi: adv_pci1710: only init async command members when needed The 'len_chanlist' and 'cancel' members of the comedi_subdevice are only used with async command support. Only initialize them if the irq was sucessfully requested. Also, only init the dev->read_subdev if we have the irq. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/adv_pci1710.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/staging/comedi/drivers/adv_pci1710.c b/drivers/staging/comedi/drivers/adv_pci1710.c index a1519c9..69ab2a6 100644 --- a/drivers/staging/comedi/drivers/adv_pci1710.c +++ b/drivers/staging/comedi/drivers/adv_pci1710.c @@ -1264,21 +1264,21 @@ static int pci1710_auto_attach(struct comedi_device *dev, if (this_board->n_aichan) { s = &dev->subdevices[subdev]; - dev->read_subdev = s; s->type = COMEDI_SUBD_AI; s->subdev_flags = SDF_READABLE | SDF_COMMON | SDF_GROUND; if (this_board->n_aichand) s->subdev_flags |= SDF_DIFF; s->n_chan = this_board->n_aichan; s->maxdata = this_board->ai_maxdata; - s->len_chanlist = this_board->n_aichan; s->range_table = this_board->rangelist_ai; - s->cancel = pci171x_ai_cancel; s->insn_read = pci171x_insn_read_ai; if (dev->irq) { + dev->read_subdev = s; s->subdev_flags |= SDF_CMD_READ; + s->len_chanlist = s->n_chan; s->do_cmdtest = pci171x_ai_cmdtest; s->do_cmd = pci171x_ai_cmd; + s->cancel = pci171x_ai_cancel; } devpriv->i8254_osc_base = I8254_OSC_BASE_10MHZ; subdev++; -- 2.7.4