Commit a8e4b9c1 authored by Yinghai Lu's avatar Yinghai Lu Committed by Bjorn Helgaas
Browse files

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: default avatarYinghai Lu <yinghai@kernel.org>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent 85019faf

drivers/pci/hotplug-pci.c

+23 −0
Original line number Diff line number Diff line
@@ -4,6 +4,29 @@ 
#include <linux/export.h>

#include "pci.h"



int __ref pci_hp_add_bridge(struct pci_dev *dev)

{

	struct pci_bus *parent = dev->bus;

	int pass, busnr, start = parent->busn_res.start;

	int end = parent->busn_res.end;



	for (busnr = start; busnr <= end; busnr++) {

		if (!pci_find_bus(pci_domain_nr(parent), busnr))

			break;

	}

	if (busnr-- > end) {

		printk(KERN_ERR "No bus number available for hot-added bridge %s\n",

				pci_name(dev));

		return -1;

	}

	for (pass = 0; pass < 2; pass++)

		busnr = pci_scan_bridge(parent, dev, busnr, pass);

	if (!dev->subordinate)

		return -1;



	return 0;

}

EXPORT_SYMBOL_GPL(pci_hp_add_bridge);



unsigned int __devinit pci_do_scan_bus(struct pci_bus *bus)

{

drivers/pci/pci.h

+1 −0
Original line number Diff line number Diff line
@@ -124,6 +124,7 @@ static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; } 
#endif



/* Functions for PCI Hotplug drivers to use */

int pci_hp_add_bridge(struct pci_dev *dev);

extern unsigned int pci_do_scan_bus(struct pci_bus *bus);



#ifdef HAVE_PCI_LEGACY