On Tue, Oct 20, 2015 at 7:35 PM, Bjorn Helgaas <helgaas@xxxxxxxxxx> wrote:
> On Tue, Oct 20, 2015 at 03:30:44PM -0700, Yinghai Lu wrote:
> I doubt I would agree with a change like this, but maybe, if you can
> explain what's unique about the sparc architecture that would require
> a change like this.
Then how about this one ?
otherwise we need to compare res with pbm->mem_space or pbm->mem64_space
to get direct parent for request_resource_conflict() calling in
pci_register_legacy_regions().
also check if if return is NULL to decide if it is valid region.
---
drivers/pci/host-bridge.c | 10 +++++++++-
include/linux/pci.h | 5 +++--
2 files changed, 12 insertions(+), 3 deletions(-)
Index: linux-2.6/drivers/pci/host-bridge.c
===================================================================
--- linux-2.6.orig/drivers/pci/host-bridge.c
+++ linux-2.6/drivers/pci/host-bridge.c
@@ -70,12 +70,17 @@ static bool region_contains(struct pci_b
return region1->start <= region2->start && region1->end >= region2->end;
}
-void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
+/*
+ * return host bridge window resource
+ */
+struct resource *pcibios_bus_to_resource(struct pci_bus *bus,
+ struct resource *res,
struct pci_bus_region *region)
{
struct pci_host_bridge *bridge = pci_find_host_bridge(bus);
struct resource_entry *window;
resource_size_t offset = 0;
+ struct resource *res_ret = NULL;
resource_list_for_each_entry(window, &bridge->windows) {
struct pci_bus_region bus_region;
@@ -88,11 +93,14 @@ void pcibios_bus_to_resource(struct pci_
if (region_contains(&bus_region, region)) {
offset = window->offset;
+ res_ret = window->res;
break;
}
}
res->start = region->start + offset;
res->end = region->end + offset;
+
+ return res_ret;
}
EXPORT_SYMBOL(pcibios_bus_to_resource);
Index: linux-2.6/include/linux/pci.h
===================================================================
--- linux-2.6.orig/include/linux/pci.h
+++ linux-2.6/include/linux/pci.h
@@ -781,8 +781,9 @@ void pci_fixup_cardbus(struct pci_bus *)
void pcibios_resource_to_bus(struct pci_bus *bus, struct
pci_bus_region *region,
struct resource *res);
-void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
- struct pci_bus_region *region);
+struct resource *pcibios_bus_to_resource(struct pci_bus *bus,
+ struct resource *res,
+ struct pci_bus_region *region);
void pcibios_scan_specific_bus(int busn);
struct pci_bus *pci_find_bus(int domain, int busnr);
void pci_bus_add_devices(const struct pci_bus *bus);
--
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