[RFC][PATCH] PCI root bridge detection fix [7/9]

[Adam Belay <abelay@novell.com>]

This patch prevents the root bridge drivers from using the legacy API.
It also updates the PCI<->PCI bridge driver to better coexist with the
legacy code.

Signed-off-by: Adam Belay <abelay@novell.com>

--- a/drivers/pci/bus/pci-bridge.c	2005-07-14 02:17:04.735566464 -0400
+++ b/drivers/pci/bus/pci-bridge.c	2005-07-14 02:24:29.577940144 -0400
@@ -128,6 +128,10 @@
 	if (dev->hdr_type != PCI_HEADER_TYPE_BRIDGE)
 		return -ENODEV;
 
+	/* don't bind to devices controlled by legacy code */
+	if (dev->subordinate)
+		return -ENODEV;
+
 	bus = ppb_detect_bus(dev);
 	if (!bus)
 		return -ENODEV;
--- a/drivers/pci/bus/probe.c	2005-07-14 02:26:30.660532792 -0400
+++ b/drivers/pci/bus/probe.c	2005-07-14 02:25:20.455205624 -0400
@@ -395,6 +395,7 @@
 struct pci_bus * __devinit pci_scan_bus_parented(struct device *parent, int bus, struct pci_ops *ops, void *sysdata)
 {
 	int error;
+	unsigned int devfn;
 	struct pci_bus *b;
 	struct device *dev;
 
@@ -440,7 +441,9 @@
 	/* Create legacy_io and legacy_mem files for this bus */
 	pci_create_legacy_files(b);
 
-	b->subordinate = pci_scan_child_bus(b);
+	/* Go find them, Rover! */
+	for (devfn = 0; devfn < 0x100; devfn += 8)
+		pci_scan_slot(b, devfn);
 
 	return b;