ia64/PCI: convert to pci_create_root_bus() for correct root bus resources
Convert from pci_create_bus() to pci_create_root_bus(). This way the root
bus resources are correct immediately. This fixes the problem of "early"
and "header" quirks seeing incorrect root bus resources.
We can't use pci_scan_root_bus() because, like x86, ACPI hotplug currently
requires pci_bus_add_devices() in a separate host bridge .start() method.
v2: fix compile error by using window resource pointer instead
CC: Tony Luck <tony.luck@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index 3f9c86a..f82f5d4 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -134,6 +134,7 @@
struct pci_root_info {
struct acpi_device *bridge;
struct pci_controller *controller;
+ struct list_head resources;
char *name;
};
@@ -315,26 +316,15 @@
&window->resource);
}
+ /* HP's firmware has a hack to work around a Windows bug.
+ * Ignore these tiny memory ranges */
+ if (!((window->resource.flags & IORESOURCE_MEM) &&
+ (window->resource.end - window->resource.start < 16)))
+ pci_add_resource(&info->resources, &window->resource);
+
return AE_OK;
}
-static void __devinit
-pcibios_setup_root_windows(struct pci_bus *bus, struct pci_controller *ctrl)
-{
- int i;
-
- pci_bus_remove_resources(bus);
- for (i = 0; i < ctrl->windows; i++) {
- struct resource *res = &ctrl->window[i].resource;
- /* HP's firmware has a hack to work around a Windows bug.
- * Ignore these tiny memory ranges */
- if ((res->flags & IORESOURCE_MEM) &&
- (res->end - res->start < 16))
- continue;
- pci_bus_add_resource(bus, res, 0);
- }
-}
-
struct pci_bus * __devinit
pci_acpi_scan_root(struct acpi_pci_root *root)
{
@@ -343,6 +333,7 @@
int bus = root->secondary.start;
struct pci_controller *controller;
unsigned int windows = 0;
+ struct pci_root_info info;
struct pci_bus *pbus;
char *name;
int pxm;
@@ -359,11 +350,10 @@
controller->node = pxm_to_node(pxm);
#endif
+ INIT_LIST_HEAD(&info.resources);
acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_window,
&windows);
if (windows) {
- struct pci_root_info info;
-
controller->window =
kmalloc_node(sizeof(*controller->window) * windows,
GFP_KERNEL, controller->node);
@@ -387,9 +377,12 @@
* should handle the case here, but it appears that IA64 hasn't
* such quirk. So we just ignore the case now.
*/
- pbus = pci_create_bus(NULL, bus, &pci_root_ops, controller);
- if (!pbus)
+ pbus = pci_create_root_bus(NULL, bus, &pci_root_ops, controller,
+ &info.resources);
+ if (!pbus) {
+ pci_free_resource_list(&info.resources);
return NULL;
+ }
pbus->subordinate = pci_scan_child_bus(pbus);
return pbus;
@@ -507,14 +500,10 @@
if (b->self) {
pci_read_bridge_bases(b);
pcibios_fixup_bridge_resources(b->self);
- } else {
- pcibios_setup_root_windows(b, b->sysdata);
}
list_for_each_entry(dev, &b->devices, bus_list)
pcibios_fixup_device_resources(dev);
platform_pci_fixup_bus(b);
-
- return;
}
void pcibios_set_master (struct pci_dev *dev)