From 262ea0d476049fa393509a70c9ecfa06df403b4a Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Wed, 23 May 2012 14:28:47 -0700 Subject: [PATCH] staging: comedi: adl_pci7296: factor out the PCI device code Factor out the code that finds a matching PCI device from attach function. This allows reducing the indent level of the remaining code in the attach function. Signed-off-by: H Hartley Sweeten Cc: Ian Abbott Cc: Mori Hess Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/adl_pci7296.c | 121 ++++++++++++++------------- 1 file changed, 62 insertions(+), 59 deletions(-) diff --git a/drivers/staging/comedi/drivers/adl_pci7296.c b/drivers/staging/comedi/drivers/adl_pci7296.c index bf2f7fb..0b8b279 100644 --- a/drivers/staging/comedi/drivers/adl_pci7296.c +++ b/drivers/staging/comedi/drivers/adl_pci7296.c @@ -54,19 +54,40 @@ struct adl_pci7296_private { #define devpriv ((struct adl_pci7296_private *)dev->private) +static struct pci_dev *adl_pci7296_find_pci(struct comedi_device *dev, + struct comedi_devconfig *it) +{ + struct pci_dev *pcidev = NULL; + int bus = it->options[0]; + int slot = it->options[1]; + + for_each_pci_dev(pcidev) { + if (pcidev->vendor != PCI_VENDOR_ID_ADLINK || + pcidev->device != PCI_DEVICE_ID_PCI7296) + continue; + if (bus || slot) { + /* requested particular bus/slot */ + if (pcidev->bus->number != bus || + PCI_SLOT(pcidev->devfn) != slot) + continue; + } + return pcidev; + } + printk(KERN_ERR + "comedi%d: no supported board found! (req. bus/slot : %d/%d)\n", + dev->minor, bus, slot); + return NULL; +} + static int adl_pci7296_attach(struct comedi_device *dev, struct comedi_devconfig *it) { - struct pci_dev *pcidev = NULL; struct comedi_subdevice *s; - int bus, slot; int ret; printk(KERN_INFO "comedi%d: attach adl_pci7432\n", dev->minor); dev->board_name = "pci7432"; - bus = it->options[0]; - slot = it->options[1]; if (alloc_private(dev, sizeof(struct adl_pci7296_private)) < 0) return -ENOMEM; @@ -74,63 +95,45 @@ static int adl_pci7296_attach(struct comedi_device *dev, if (alloc_subdevices(dev, 4) < 0) return -ENOMEM; - for_each_pci_dev(pcidev) { - if (pcidev->vendor == PCI_VENDOR_ID_ADLINK && - pcidev->device == PCI_DEVICE_ID_PCI7296) { - if (bus || slot) { - /* requested particular bus/slot */ - if (pcidev->bus->number != bus - || PCI_SLOT(pcidev->devfn) != slot) { - continue; - } - } - devpriv->pci_dev = pcidev; - if (comedi_pci_enable(pcidev, "adl_pci7296") < 0) { - printk(KERN_ERR "comedi%d: Failed to enable PCI device and request regions\n", - dev->minor); - return -EIO; - } - - dev->iobase = pci_resource_start(pcidev, 2); - printk(KERN_INFO "comedi: base addr %4lx\n", - dev->iobase); - - /* four 8255 digital io subdevices */ - s = dev->subdevices + 0; - subdev_8255_init(dev, s, NULL, - (unsigned long)(dev->iobase)); - - s = dev->subdevices + 1; - ret = subdev_8255_init(dev, s, NULL, - (unsigned long)(dev->iobase + - PORT2A)); - if (ret < 0) - return ret; - - s = dev->subdevices + 2; - ret = subdev_8255_init(dev, s, NULL, - (unsigned long)(dev->iobase + - PORT3A)); - if (ret < 0) - return ret; - - s = dev->subdevices + 3; - ret = subdev_8255_init(dev, s, NULL, - (unsigned long)(dev->iobase + - PORT4A)); - if (ret < 0) - return ret; - - printk(KERN_DEBUG "comedi%d: adl_pci7432 attached\n", - dev->minor); - - return 1; - } + devpriv->pci_dev = adl_pci7296_find_pci(dev, it); + if (!devpriv->pci_dev) + return -EIO; + + if (comedi_pci_enable(devpriv->pci_dev, "adl_pci7296") < 0) { + printk(KERN_ERR + "comedi%d: Failed to enable PCI device and request regions\n", + dev->minor); + return -EIO; } - printk(KERN_ERR "comedi%d: no supported board found! (req. bus/slot : %d/%d)\n", - dev->minor, bus, slot); - return -EIO; + dev->iobase = pci_resource_start(devpriv->pci_dev, 2); + printk(KERN_INFO "comedi: base addr %4lx\n", dev->iobase); + + /* four 8255 digital io subdevices */ + s = dev->subdevices + 0; + subdev_8255_init(dev, s, NULL, (unsigned long)(dev->iobase)); + + s = dev->subdevices + 1; + ret = subdev_8255_init(dev, s, NULL, + (unsigned long)(dev->iobase + PORT2A)); + if (ret < 0) + return ret; + + s = dev->subdevices + 2; + ret = subdev_8255_init(dev, s, NULL, + (unsigned long)(dev->iobase + PORT3A)); + if (ret < 0) + return ret; + + s = dev->subdevices + 3; + ret = subdev_8255_init(dev, s, NULL, + (unsigned long)(dev->iobase + PORT4A)); + if (ret < 0) + return ret; + + printk(KERN_DEBUG "comedi%d: adl_pci7432 attached\n", dev->minor); + + return 0; } static void adl_pci7296_detach(struct comedi_device *dev) -- 2.7.4