From 8429504a575ded74c6267361592879cedfb7b860 Mon Sep 17 00:00:00 2001
From: H Hartley Sweeten <hsweeten@visionengravers.com>
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 <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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 a4c59291568f2..2498ab19daefa 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;
--
2.30.2