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staging: comedi: pcl818: only init async command members when needed

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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.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten
2013-12-03 12:07:18 -07:00
committed by Greg Kroah-Hartman
parent 281b6e75fd
commit 5d788d019c
1 changed files with 2 additions and 2 deletions
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4
drivers/staging/comedi/drivers/pcl818.c
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@@ -1279,15 +1279,15 @@ static int pcl818_attach(struct comedi_device *dev, struct comedi_devconfig *it)
s->subdev_flags |= SDF_DIFF;
}
s->maxdata = board->ai_maxdata;
s->len_chanlist = s->n_chan;
s->range_table = board->ai_range_type;
s->cancel = pcl818_ai_cancel;
s->insn_read = pcl818_ai_insn_read;
if (dev->irq) {
dev->read_subdev = s;
s->subdev_flags |= SDF_CMD_READ;
s->len_chanlist = s->n_chan;
s->do_cmdtest = ai_cmdtest;
s->do_cmd = ai_cmd;
s->cancel = pcl818_ai_cancel;
}
if (board->is_818) {
if ((it->options[4] == 1) || (it->options[4] == 10))