staging: comedi: das16: introduce das16_free_dma()

For aesthetics, move the freeing of the DMA channel and the buffers to
a helper function.

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>

diff --git a/drivers/staging/comedi/drivers/das16.c b/drivers/staging/comedi/drivers/das16.c
index 0f4a587..e0b41ae 100644 (file)
--- a/drivers/staging/comedi/drivers/das16.c
+++ b/drivers/staging/comedi/drivers/das16.c
@@ -1028,6 +1028,24 @@ static int das16_alloc_dma(struct comedi_device *dev, unsigned int dma_chan)
        return 0;
 }
 
+static void das16_free_dma(struct comedi_device *dev)
+{
+       struct das16_private_struct *devpriv = dev->private;
+       struct das16_dma_desc *dma;
+       int i;
+
+       if (devpriv->timer.data)
+               del_timer_sync(&devpriv->timer);
+       for (i = 0; i < 2; i++) {
+               dma = &devpriv->dma_desc[i];
+               if (dma->virt_addr)
+                       pci_free_consistent(NULL, DAS16_DMA_SIZE,
+                                           dma->virt_addr, dma->hw_addr);
+       }
+       if (devpriv->dma_chan)
+               free_dma(devpriv->dma_chan);
+}
+
 static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 {
        const struct das16_board *board = dev->board_ptr;
@@ -1226,24 +1244,11 @@ static void das16_detach(struct comedi_device *dev)
 {
        const struct das16_board *board = dev->board_ptr;
        struct das16_private_struct *devpriv = dev->private;
-       struct das16_dma_desc *dma;
-       int i;
 
        if (devpriv) {
-               if (devpriv->timer.data)
-                       del_timer_sync(&devpriv->timer);
                if (dev->iobase)
                        das16_reset(dev);
-
-               for (i = 0; i < 2; i++) {
-                       dma = &devpriv->dma_desc[i];
-                       if (dma->virt_addr)
-                               pci_free_consistent(NULL, DAS16_DMA_SIZE,
-                                                   dma->virt_addr,
-                                                   dma->hw_addr);
-               }
-               if (devpriv->dma_chan)
-                       free_dma(devpriv->dma_chan);
+               das16_free_dma(dev);
                kfree(devpriv->user_ai_range_table);
                kfree(devpriv->user_ao_range_table);