From: H Hartley Sweeten <hartl...@visionengravers.com>
For aesthetics, introduce a helper function to free the DMA channel and
buffer.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/ni_at_a2150.c | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)
diff --git a/drivers/staging/comedi/drivers/ni_at_a2150.c
b/drivers/staging/comedi/drivers/ni_at_a2150.c
index 11b1681..de2e877 100644
--- a/drivers/staging/comedi/drivers/ni_at_a2150.c
+++ b/drivers/staging/comedi/drivers/ni_at_a2150.c
@@ -720,6 +720,18 @@ static void a2150_alloc_irq_dma(struct comedi_device *dev,
set_dma_mode(dma_chan, DMA_MODE_READ);
}
+static void a2150_free_dma(struct comedi_device *dev)
+{
+ struct a2150_private *devpriv = dev->private;
+
+ if (!devpriv)
+ return;
+
+ if (devpriv->dma)
+ free_dma(devpriv->dma);
+ kfree(devpriv->dma_buffer);
+}
+
/* probes board type, returns offset */
static int a2150_probe(struct comedi_device *dev)
{
@@ -808,15 +820,9 @@ static int a2150_attach(struct comedi_device *dev, struct
comedi_devconfig *it)
static void a2150_detach(struct comedi_device *dev)
{
- struct a2150_private *devpriv = dev->private;
-
if (dev->iobase)
outw(APD_BIT | DPD_BIT, dev->iobase + CONFIG_REG);
- if (devpriv) {
- if (devpriv->dma)
- free_dma(devpriv->dma);
- kfree(devpriv->dma_buffer);
- }
+ a2150_free_dma(dev);
comedi_legacy_detach(dev);
};
--
2.0.3
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