From 8429504a575ded74c6267361592879cedfb7b860 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Tue, 4 Mar 2014 11:29:35 -0700 Subject: [PATCH] staging: comedi: pcl816: only hook up async command support if DMA is available 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 Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/pcl816.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/comedi/drivers/pcl816.c b/drivers/staging/comedi/drivers/pcl816.c index a4c59291568f..2498ab19daef 100644 --- a/drivers/staging/comedi/drivers/pcl816.c +++ b/drivers/staging/comedi/drivers/pcl816.c @@ -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; -- 2.34.1