staging: comedi: rtd520: 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/rtd520.c b/drivers/staging/comedi/drivers/rtd520.c
index 92f806d..97d888f 100644 (file)
--- a/drivers/staging/comedi/drivers/rtd520.c
+++ b/drivers/staging/comedi/drivers/rtd520.c
@@ -1605,12 +1605,47 @@ static int rtd_dio_insn_config(struct comedi_device *dev,
        return 1;
 }
 
+static struct pci_dev *rtd_find_pci(struct comedi_device *dev,
+                                   struct comedi_devconfig *it)
+{
+       struct pci_dev *pcidev;
+
+       for (pcidev = pci_get_device(PCI_VENDOR_ID_RTD, PCI_ANY_ID, NULL);
+            pcidev != NULL;
+            pcidev = pci_get_device(PCI_VENDOR_ID_RTD, PCI_ANY_ID, pcidev)) {
+               int i;
+
+               if (it->options[0] || it->options[1]) {
+                       if (pcidev->bus->number != it->options[0]
+                           || PCI_SLOT(pcidev->devfn) != it->options[1]) {
+                               continue;
+                       }
+               }
+               for (i = 0; i < ARRAY_SIZE(rtd520Boards); ++i) {
+                       if (pcidev->device == rtd520Boards[i].device_id) {
+                               dev->board_ptr = &rtd520Boards[i];
+                               break;
+                       }
+               }
+               if (dev->board_ptr)
+                       return pcidev;  /* found one */
+       }
+       if (!pcidev) {
+               if (it->options[0] && it->options[1]) {
+                       printk(KERN_INFO "No RTD card at bus=%d slot=%d.\n",
+                              it->options[0], it->options[1]);
+               } else {
+                       printk(KERN_INFO "No RTD card found.\n");
+               }
+       }
+       return NULL;
+}
+
 static int rtd_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 {                              /* board name and options flags */
        const struct rtdBoard *thisboard;
        struct rtdPrivate *devpriv;
        struct comedi_subdevice *s;
-       struct pci_dev *pcidev;
        int ret;
        resource_size_t physLas0;       /* configuration */
        resource_size_t physLas1;       /* data area */
@@ -1635,43 +1670,14 @@ static int rtd_attach(struct comedi_device *dev, struct comedi_devconfig *it)
                return -ENOMEM;
        devpriv = dev->private;
 
-       /*
-        * Probe the device to determine what device in the series it is.
-        */
-       for (pcidev = pci_get_device(PCI_VENDOR_ID_RTD, PCI_ANY_ID, NULL);
-            pcidev != NULL;
-            pcidev = pci_get_device(PCI_VENDOR_ID_RTD, PCI_ANY_ID, pcidev)) {
-               int i;
-
-               if (it->options[0] || it->options[1]) {
-                       if (pcidev->bus->number != it->options[0]
-                           || PCI_SLOT(pcidev->devfn) != it->options[1]) {
-                               continue;
-                       }
-               }
-               for (i = 0; i < ARRAY_SIZE(rtd520Boards); ++i) {
-                       if (pcidev->device == rtd520Boards[i].device_id) {
-                               dev->board_ptr = &rtd520Boards[i];
-                               break;
-                       }
-               }
-               if (dev->board_ptr)
-                       break;  /* found one */
-       }
-       if (!pcidev) {
-               if (it->options[0] && it->options[1]) {
-                       printk(KERN_INFO "No RTD card at bus=%d slot=%d.\n",
-                              it->options[0], it->options[1]);
-               } else {
-                       printk(KERN_INFO "No RTD card found.\n");
-               }
+       devpriv->pci_dev = rtd_find_pci(dev, it);
+       if (!devpriv->pci_dev)
                return -EIO;
-       }
-       devpriv->pci_dev = pcidev;
        thisboard = comedi_board(dev);
+
        dev->board_name = thisboard->name;
 
-       ret = comedi_pci_enable(pcidev, DRV_NAME);
+       ret = comedi_pci_enable(devpriv->pci_dev, DRV_NAME);
        if (ret < 0) {
                printk(KERN_INFO "Failed to enable PCI device and request regions.\n");
                return ret;