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PCI: add generic pci_hp_add_bridge()
This creates a generic pci_hp_add_bridge() that can be used by several hotplug drivers. [bhelgaas: split out from pciehp patch] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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2 changed files with 24 additions and 0 deletions
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@ -4,6 +4,29 @@
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#include <linux/export.h>
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#include "pci.h"
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int __ref pci_hp_add_bridge(struct pci_dev *dev)
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{
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struct pci_bus *parent = dev->bus;
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int pass, busnr, start = parent->busn_res.start;
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int end = parent->busn_res.end;
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for (busnr = start; busnr <= end; busnr++) {
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if (!pci_find_bus(pci_domain_nr(parent), busnr))
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break;
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}
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if (busnr-- > end) {
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printk(KERN_ERR "No bus number available for hot-added bridge %s\n",
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pci_name(dev));
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return -1;
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}
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for (pass = 0; pass < 2; pass++)
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busnr = pci_scan_bridge(parent, dev, busnr, pass);
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if (!dev->subordinate)
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return -1;
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return 0;
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}
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EXPORT_SYMBOL_GPL(pci_hp_add_bridge);
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unsigned int __devinit pci_do_scan_bus(struct pci_bus *bus)
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{
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@ -124,6 +124,7 @@ static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
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#endif
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/* Functions for PCI Hotplug drivers to use */
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int pci_hp_add_bridge(struct pci_dev *dev);
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extern unsigned int pci_do_scan_bus(struct pci_bus *bus);
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#ifdef HAVE_PCI_LEGACY
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