From fc330f458941df0f1651964e8e1207e62fb6db51 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Wed, 23 May 2012 14:38:33 -0700 Subject: [PATCH] staging: comedi: adl_pci7432: 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_pci7432.c | 112 ++++++++++++++------------- 1 file changed, 58 insertions(+), 54 deletions(-) diff --git a/drivers/staging/comedi/drivers/adl_pci7432.c b/drivers/staging/comedi/drivers/adl_pci7432.c index 2fc1dbb..dd818f1 100644 --- a/drivers/staging/comedi/drivers/adl_pci7432.c +++ b/drivers/staging/comedi/drivers/adl_pci7432.c @@ -88,18 +88,39 @@ static int adl_pci7432_di_insn_bits(struct comedi_device *dev, return 2; } +static struct pci_dev *adl_pci7432_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_PCI7432) + 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_pci7432_attach(struct comedi_device *dev, struct comedi_devconfig *it) { - struct pci_dev *pcidev = NULL; struct comedi_subdevice *s; - int bus, slot; 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_pci7432_private)) < 0) return -ENOMEM; @@ -107,57 +128,40 @@ static int adl_pci7432_attach(struct comedi_device *dev, if (alloc_subdevices(dev, 2) < 0) return -ENOMEM; - for_each_pci_dev(pcidev) { - if (pcidev->vendor == PCI_VENDOR_ID_ADLINK && - pcidev->device == PCI_DEVICE_ID_PCI7432) { - 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_pci7432") < 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); - - s = dev->subdevices + 0; - s->type = COMEDI_SUBD_DI; - s->subdev_flags = - SDF_READABLE | SDF_GROUND | SDF_COMMON; - s->n_chan = 32; - s->maxdata = 1; - s->len_chanlist = 32; - s->io_bits = 0x00000000; - s->range_table = &range_digital; - s->insn_bits = adl_pci7432_di_insn_bits; - - s = dev->subdevices + 1; - s->type = COMEDI_SUBD_DO; - s->subdev_flags = - SDF_WRITABLE | SDF_GROUND | SDF_COMMON; - s->n_chan = 32; - s->maxdata = 1; - s->len_chanlist = 32; - s->io_bits = 0xffffffff; - s->range_table = &range_digital; - s->insn_bits = adl_pci7432_do_insn_bits; - - printk(KERN_DEBUG "comedi%d: adl_pci7432 attached\n", - dev->minor); - return 1; - } - } + devpriv->pci_dev = adl_pci7432_find_pci(dev, it); + if (!devpriv->pci_dev) + return -EIO; - printk(KERN_ERR "comedi%d: no supported board found! (req. bus/slot : %d/%d)\n", - dev->minor, bus, slot); - return -EIO; + if (comedi_pci_enable(devpriv->pci_dev, "adl_pci7432") < 0) { + printk(KERN_ERR "comedi%d: Failed to enable PCI device and request regions\n", + dev->minor); + return -EIO; + } + dev->iobase = pci_resource_start(devpriv->pci_dev, 2); + printk(KERN_INFO "comedi: base addr %4lx\n", dev->iobase); + + s = dev->subdevices + 0; + s->type = COMEDI_SUBD_DI; + s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_COMMON; + s->n_chan = 32; + s->maxdata = 1; + s->len_chanlist = 32; + s->io_bits = 0x00000000; + s->range_table = &range_digital; + s->insn_bits = adl_pci7432_di_insn_bits; + + s = dev->subdevices + 1; + s->type = COMEDI_SUBD_DO; + s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_COMMON; + s->n_chan = 32; + s->maxdata = 1; + s->len_chanlist = 32; + s->io_bits = 0xffffffff; + s->range_table = &range_digital; + s->insn_bits = adl_pci7432_do_insn_bits; + + printk(KERN_DEBUG "comedi%d: adl_pci7432 attached\n", dev->minor); + return 0; } static void adl_pci7432_detach(struct comedi_device *dev) -- 2.7.4