From: Bjorn Helgaas <bhelgaas@google.com>
Date: Fri, 24 Feb 2012 03:19:01 +0000 (-0700)
Subject: ia64/PCI: SN: convert to pci_scan_root_bus() for correct root bus resources
X-Git-Tag: firefly_0821_release~3680^2~3275^2~28^2~10
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f920b55de413538d2cfccd6de2c9b39efd2593cc;p=firefly-linux-kernel-4.4.55.git

ia64/PCI: SN: convert to pci_scan_root_bus() for correct root bus resources

Convert from pci_scan_bus() to pci_scan_root_bus().  Supply the root
bus resources from bussoft.  When we move the resource adjustment from
pcibios_fixup_resources() to the PCI core, it will be important to have
the root bus resources correct from the beginning.

CC: Tony Luck <tony.luck@intel.com>
CC: Jack Steiner <steiner@sgi.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---

diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index 0a36f082eaf1..c99c2ca0636b 100644
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -297,7 +297,8 @@ sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
 	s64 status = 0;
 	struct pci_controller *controller;
 	struct pcibus_bussoft *prom_bussoft_ptr;
-
+	LIST_HEAD(resources);
+	int i;
 
  	status = sal_get_pcibus_info((u64) segment, (u64) busnum,
  				     (u64) ia64_tpa(&prom_bussoft_ptr));
@@ -315,7 +316,13 @@ sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
 	 */
 	controller->platform_data = prom_bussoft_ptr;
 
-	bus = pci_scan_bus(busnum, &pci_root_ops, controller);
+	sn_legacy_pci_window_fixup(controller,
+				   prom_bussoft_ptr->bs_legacy_io,
+				   prom_bussoft_ptr->bs_legacy_mem);
+	for (i = 0; i < controller->windows; i++)
+		pci_add_resource(&resources, &controller->window[i].resource);
+	bus = pci_scan_root_bus(NULL, busnum, &pci_root_ops, controller,
+				&resources);
  	if (bus == NULL)
  		goto error_return; /* error, or bus already scanned */
 
@@ -348,9 +355,6 @@ sn_bus_fixup(struct pci_bus *bus)
 			return;
 		}
 		sn_common_bus_fixup(bus, prom_bussoft_ptr);
-		sn_legacy_pci_window_fixup(PCI_CONTROLLER(bus),
-					   prom_bussoft_ptr->bs_legacy_io,
-					   prom_bussoft_ptr->bs_legacy_mem);
         }
         list_for_each_entry(pci_dev, &bus->devices, bus_list) {
                 sn_io_slot_fixup(pci_dev);