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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>
hifive-unleashed-5.1
Bjorn Helgaas 2011-10-28 16:26:31 -06:00 committed by Jesse Barnes
parent 79e77f27f5
commit e30f99222f
1 changed files with 14 additions and 25 deletions
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39
arch/ia64/pci/pci.c
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@ -134,6 +134,7 @@ alloc_pci_controller (int seg)
struct pci_root_info {
struct acpi_device *bridge;
struct pci_controller *controller;
struct list_head resources;
char *name;
};
@ -315,26 +316,15 @@ static __devinit acpi_status add_window(struct acpi_resource *res, void *data)
&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 @@ pci_acpi_scan_root(struct acpi_pci_root *root)
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 @@ pci_acpi_scan_root(struct acpi_pci_root *root)
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 @@ pci_acpi_scan_root(struct acpi_pci_root *root)
* 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 @@ pcibios_fixup_bus (struct pci_bus *b)
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)