From 327be979c1819d4404927af4b6e3ba8f22a4fa07 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Tue, 26 Jun 2012 17:53:08 -0700 Subject: [PATCH] staging: comedi: cb_pcidas: factor out the find pci device code Factor the "find pci device" code out of the attach function. Signed-off-by: H Hartley Sweeten Cc: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/cb_pcidas.c | 70 ++++++++++++---------- 1 file changed, 38 insertions(+), 32 deletions(-) diff --git a/drivers/staging/comedi/drivers/cb_pcidas.c b/drivers/staging/comedi/drivers/cb_pcidas.c index 146d0788f3db..051c94cc01f8 100644 --- a/drivers/staging/comedi/drivers/cb_pcidas.c +++ b/drivers/staging/comedi/drivers/cb_pcidas.c @@ -1608,64 +1608,70 @@ static irqreturn_t cb_pcidas_interrupt(int irq, void *d) return IRQ_HANDLED; } -static int cb_pcidas_attach(struct comedi_device *dev, - struct comedi_devconfig *it) +static struct pci_dev *cb_pcidas_find_pci_device(struct comedi_device *dev, + struct comedi_devconfig *it) { const struct cb_pcidas_board *thisboard; - struct cb_pcidas_private *devpriv; - struct comedi_subdevice *s; struct pci_dev *pcidev = NULL; - int index; + int bus = it->options[0]; + int slot = it->options[1]; int i; - int ret; - -/* - * Allocate the private structure area. - */ - if (alloc_private(dev, sizeof(struct cb_pcidas_private)) < 0) - return -ENOMEM; - devpriv = dev->private; - -/* - * Probe the device to determine what device in the series it is. - */ for_each_pci_dev(pcidev) { /* is it not a computer boards card? */ if (pcidev->vendor != PCI_VENDOR_ID_CB) continue; /* loop through cards supported by this driver */ - for (index = 0; index < ARRAY_SIZE(cb_pcidas_boards); index++) { - if (cb_pcidas_boards[index].device_id != pcidev->device) + for (i = 0; i < ARRAY_SIZE(cb_pcidas_boards); i++) { + thisboard = &cb_pcidas_boards[i]; + if (thisboard->device_id != pcidev->device) continue; /* was a particular bus/slot requested? */ - if (it->options[0] || it->options[1]) { + if (bus || slot) { /* are we on the wrong bus/slot? */ - if (pcidev->bus->number != it->options[0] || - PCI_SLOT(pcidev->devfn) != it->options[1]) { + if (pcidev->bus->number != bus || + PCI_SLOT(pcidev->devfn) != slot) { continue; } } - devpriv->pci_dev = pcidev; - dev->board_ptr = cb_pcidas_boards + index; - goto found; + dev->board_ptr = thisboard; + return pcidev; } } + return NULL; +} + +static int cb_pcidas_attach(struct comedi_device *dev, + struct comedi_devconfig *it) +{ + const struct cb_pcidas_board *thisboard; + struct cb_pcidas_private *devpriv; + struct comedi_subdevice *s; + int i; + int ret; - dev_err(dev->class_dev, - "No supported ComputerBoards/MeasurementComputing card found on requested position\n"); - return -EIO; +/* + * Allocate the private structure area. + */ + if (alloc_private(dev, sizeof(struct cb_pcidas_private)) < 0) + return -ENOMEM; + devpriv = dev->private; + + devpriv->pci_dev = cb_pcidas_find_pci_device(dev, it); + if (!devpriv->pci_dev) { + dev_err(dev->class_dev, "No supported card found\n"); + return -EIO; + } -found: thisboard = comedi_board(dev); dev_dbg(dev->class_dev, "Found %s on bus %i, slot %i\n", - cb_pcidas_boards[index].name, pcidev->bus->number, - PCI_SLOT(pcidev->devfn)); + thisboard->name, devpriv->pci_dev->bus->number, + PCI_SLOT(devpriv->pci_dev->devfn)); /* * Enable PCI device and reserve I/O ports. */ - if (comedi_pci_enable(pcidev, "cb_pcidas")) { + if (comedi_pci_enable(devpriv->pci_dev, "cb_pcidas")) { dev_err(dev->class_dev, "Failed to enable PCI device and request regions\n"); return -EIO; -- 2.39.2