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staging: comedi: pcl816: only hook up async command support if DMA is available

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This driver only supports async commands if a DMA channel is available. Modify
the subdevice init so that the command support only gets hooked up if we can
do DMA.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten
2014-03-04 11:29:35 -07:00
committed by Greg Kroah-Hartman
parent 885a7da351
commit 8429504a57
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/comedi/drivers/pcl816.c
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@@ -734,7 +734,7 @@ static int pcl816_attach(struct comedi_device *dev, struct comedi_devconfig *it)
s->maxdata = board->ai_maxdata;
s->range_table = &range_pcl816;
s->insn_read = pcl816_ai_insn_read;
if (dev->irq) {
if (devpriv->dma) {
dev->read_subdev = s;
s->subdev_flags |= SDF_CMD_READ;
s->len_chanlist = board->ai_chanlist;