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| author | H Hartley Sweeten <hartleys@visionengravers.com> | 2012-09-24 13:23:57 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-09-26 09:37:31 -0700 |
| commit | b7047895b9c9deee0b0f4cb2a0a788c189f985f2 (patch) | |
| tree | e991436490d67ef9a376893909eedea6177f56bd /drivers/staging | |
| parent | 97d87e00e3d6bdc8f3de606dd7cc5aa149709435 (diff) | |
| download | linux-3.10-b7047895b9c9deee0b0f4cb2a0a788c189f985f2.tar.gz linux-3.10-b7047895b9c9deee0b0f4cb2a0a788c189f985f2.tar.bz2 linux-3.10-b7047895b9c9deee0b0f4cb2a0a788c189f985f2.zip | |
staging: comedi: s626: factor out the dma buffer allocation
To make the attach a bit cleaner, factor the dma buffer allocation
out of attach_pci() into a new function.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/comedi/drivers/s626.c | 57 |
1 files changed, 30 insertions, 27 deletions
diff --git a/drivers/staging/comedi/drivers/s626.c b/drivers/staging/comedi/drivers/s626.c index a9d78c72140..61bb8ab0578 100644 --- a/drivers/staging/comedi/drivers/s626.c +++ b/drivers/staging/comedi/drivers/s626.c @@ -2437,6 +2437,33 @@ static void CountersInit(struct comedi_device *dev) } } +static int s626_allocate_dma_buffers(struct comedi_device *dev) +{ + struct pci_dev *pcidev = comedi_to_pci_dev(dev); + void *addr; + dma_addr_t appdma; + + devpriv->allocatedBuf = 0; + + addr = pci_alloc_consistent(pcidev, DMABUF_SIZE, &appdma); + if (!addr) + return -ENOMEM; + devpriv->ANABuf.LogicalBase = addr; + devpriv->ANABuf.PhysicalBase = appdma; + + devpriv->allocatedBuf++; + + addr = pci_alloc_consistent(pcidev, DMABUF_SIZE, &appdma); + if (!addr) + return -ENOMEM; + devpriv->RPSBuf.LogicalBase = addr; + devpriv->RPSBuf.PhysicalBase = appdma; + + devpriv->allocatedBuf++; + + return 0; +} + static int s626_attach_pci(struct comedi_device *dev, struct pci_dev *pcidev) { /* uint8_t PollList; */ @@ -2446,7 +2473,6 @@ static int s626_attach_pci(struct comedi_device *dev, struct pci_dev *pcidev) /* unsigned int data[16]; */ int i; int ret; - dma_addr_t appdma; struct comedi_subdevice *s; comedi_set_hw_dev(dev, &pcidev->dev); @@ -2473,32 +2499,9 @@ static int s626_attach_pci(struct comedi_device *dev, struct pci_dev *pcidev) /* DMA FIXME DMA// */ - /* adc buffer allocation */ - devpriv->allocatedBuf = 0; - - devpriv->ANABuf.LogicalBase = - pci_alloc_consistent(pcidev, DMABUF_SIZE, &appdma); - - if (devpriv->ANABuf.LogicalBase == NULL) { - printk(KERN_ERR "s626_attach: DMA Memory mapping error\n"); - return -ENOMEM; - } - - devpriv->ANABuf.PhysicalBase = appdma; - - devpriv->allocatedBuf++; - - devpriv->RPSBuf.LogicalBase = - pci_alloc_consistent(pcidev, DMABUF_SIZE, &appdma); - - if (devpriv->RPSBuf.LogicalBase == NULL) { - printk(KERN_ERR "s626_attach: DMA Memory mapping error\n"); - return -ENOMEM; - } - - devpriv->RPSBuf.PhysicalBase = appdma; - - devpriv->allocatedBuf++; + ret = s626_allocate_dma_buffers(dev); + if (ret) + return ret; ret = comedi_alloc_subdevices(dev, 6); if (ret) |