staging: comedi: adv_pci1710: factor out the "find pci device" code

Factor the "find pci device" code out of the attach 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>

diff --git a/drivers/staging/comedi/drivers/adv_pci1710.c b/drivers/staging/comedi/drivers/adv_pci1710.c
index 0ed1ff9..0823a36 100644 (file)
--- a/drivers/staging/comedi/drivers/adv_pci1710.c
+++ b/drivers/staging/comedi/drivers/adv_pci1710.c
@@ -1333,29 +1333,21 @@ static int pci1710_reset(struct comedi_device *dev)
        DPRINTK("adv_pci1710 EDBG: END: pci1710_reset(...)\n");
 }
 
-static int pci1710_attach(struct comedi_device *dev,
-                         struct comedi_devconfig *it)
+static struct pci_dev *pci1710_find_pci_dev(struct comedi_device *dev,
+                                           struct comedi_devconfig *it)
 {
-       struct comedi_subdevice *s;
-       int ret, subdev, n_subdevices;
-       unsigned int irq;
-       unsigned long iobase;
        struct pci_dev *pcidev;
        int opt_bus, opt_slot;
        const char *errstr;
        unsigned char pci_bus, pci_slot, pci_func;
        int i;
        int board_index;
-
-       dev_info(dev->class_dev, DRV_NAME ": attach\n");
+       unsigned int irq;
+       unsigned long iobase;
 
        opt_bus = it->options[0];
        opt_slot = it->options[1];
 
-       ret = alloc_private(dev, sizeof(struct pci1710_private));
-       if (ret < 0)
-               return -ENOMEM;
-
        /* Look for matching PCI device */
        errstr = "not found!";
        pcidev = NULL;
@@ -1404,7 +1396,7 @@ static int pci1710_attach(struct comedi_device *dev,
                } else {
                        dev_err(dev->class_dev, "- Card %s\n", errstr);
                }
-               return -EIO;
+               return NULL;
        }
 
        pci_bus = pcidev->bus->number;
@@ -1416,10 +1408,30 @@ static int pci1710_attach(struct comedi_device *dev,
        dev_dbg(dev->class_dev, "b:s:f=%d:%d:%d, io=0x%4lx\n",
                pci_bus, pci_slot, pci_func, iobase);
 
-       dev->iobase = iobase;
+       return pcidev;
+}
+
+static int pci1710_attach(struct comedi_device *dev,
+                         struct comedi_devconfig *it)
+{
+       struct comedi_subdevice *s;
+       int ret, subdev, n_subdevices;
+       unsigned int irq;
+
+       dev_info(dev->class_dev, DRV_NAME ": attach\n");
+
+       ret = alloc_private(dev, sizeof(struct pci1710_private));
+       if (ret < 0)
+               return -ENOMEM;
+
+       devpriv->pcidev = pci1710_find_pci_dev(dev, it);
+       if (!devpriv->pcidev)
+               return -EIO;
+
+       dev->iobase = pci_resource_start(devpriv->pcidev, 2);
+       irq = devpriv->pcidev->irq;
 
        dev->board_name = this_board->name;
-       devpriv->pcidev = pcidev;
 
        n_subdevices = 0;
        if (this_board->n_aichan)