linux/drivers/pci/hotplug-pci.c
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   1/* Core PCI functionality used only by PCI hotplug */
   2
   3#include <linux/pci.h>
   4#include <linux/export.h>
   5#include "pci.h"
   6
   7int __ref pci_hp_add_bridge(struct pci_dev *dev)
   8{
   9        struct pci_bus *parent = dev->bus;
  10        int pass, busnr, start = parent->busn_res.start;
  11        int end = parent->busn_res.end;
  12
  13        for (busnr = start; busnr <= end; busnr++) {
  14                if (!pci_find_bus(pci_domain_nr(parent), busnr))
  15                        break;
  16        }
  17        if (busnr-- > end) {
  18                printk(KERN_ERR "No bus number available for hot-added bridge %s\n",
  19                                pci_name(dev));
  20                return -1;
  21        }
  22        for (pass = 0; pass < 2; pass++)
  23                busnr = pci_scan_bridge(parent, dev, busnr, pass);
  24        if (!dev->subordinate)
  25                return -1;
  26
  27        return 0;
  28}
  29EXPORT_SYMBOL_GPL(pci_hp_add_bridge);
  30
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