PCI: show host bridges and root bus resources

Show the bus number and resources for every root bus we create.  This
will become more interesting when we supply the correct resources
instead of using the defaults (ioport_resource and iomem_resource).
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

drivers/pci/probe.c

@@ -1525,9 +1525,10 @@ unsigned int __devinit pci_scan_child_bus(struct pci_bus *bus)
 struct pci_bus * pci_create_bus(struct device *parent,
 		int bus, struct pci_ops *ops, void *sysdata)
 {
-	int error;
+	int error, i;
 	struct pci_bus *b, *b2;
 	struct device *dev;
+	struct resource *res;
 
 	b = pci_alloc_bus();
 	if (!b)
@@ -1580,6 +1581,16 @@ struct pci_bus * pci_create_bus(struct device *parent,
 	b->resource[0] = &ioport_resource;
 	b->resource[1] = &iomem_resource;
 
+	if (parent)
+		dev_info(parent, "PCI host bridge to bus %s\n", dev_name(&b->dev));
+	else
+		printk(KERN_INFO "PCI host bridge to bus %s\n", dev_name(&b->dev));
+
+	pci_bus_for_each_resource(b, res, i) {
+		if (res)
+			dev_info(&b->dev, "root bus resource %pR\n", res);
+	}
+
 	return b;
 
 class_dev_reg_err: