drivers/pci/hotplug-pci.c

   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
   7 int __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 }
  29 EXPORT_SYMBOL_GPL(pci_hp_add_bridge);