x86/PCI: Allocate resources on a per-bus basis for hot-adding root buses
Previously pcibios_allocate_resources() allocated resources at boot-time
for all PCI devices using for_each_pci_dev(). This patch changes
pcibios_allocate_resources() so we can specify a bus, so we can do
similar allocation when hot-adding a root bus.
[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index 5817cf2..84696ed 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -215,16 +215,15 @@
}
}
-static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
+static void __init pcibios_allocate_bus_resources(struct pci_bus *bus)
{
- struct pci_bus *bus;
+ struct pci_bus *child;
/* Depth-First Search on bus tree */
- list_for_each_entry(bus, bus_list, node) {
- if (bus->self)
- pcibios_allocate_bridge_resources(bus->self);
- pcibios_allocate_bus_resources(&bus->children);
- }
+ if (bus->self)
+ pcibios_allocate_bridge_resources(bus->self);
+ list_for_each_entry(child, &bus->children, node)
+ pcibios_allocate_bus_resources(child);
}
struct pci_check_idx_range {
@@ -285,12 +284,18 @@
}
}
-static void __init pcibios_allocate_resources(int pass)
+static void __init pcibios_allocate_resources(struct pci_bus *bus, int pass)
{
- struct pci_dev *dev = NULL;
+ struct pci_dev *dev;
+ struct pci_bus *child;
- for_each_pci_dev(dev)
+ list_for_each_entry(dev, &bus->devices, bus_list) {
pcibios_allocate_dev_resources(dev, pass);
+
+ child = dev->subordinate;
+ if (child)
+ pcibios_allocate_resources(child, pass);
+ }
}
static int __init pcibios_assign_resources(void)
@@ -323,10 +328,17 @@
void __init pcibios_resource_survey(void)
{
+ struct pci_bus *bus;
+
DBG("PCI: Allocating resources\n");
- pcibios_allocate_bus_resources(&pci_root_buses);
- pcibios_allocate_resources(0);
- pcibios_allocate_resources(1);
+
+ list_for_each_entry(bus, &pci_root_buses, node)
+ pcibios_allocate_bus_resources(bus);
+
+ list_for_each_entry(bus, &pci_root_buses, node)
+ pcibios_allocate_resources(bus, 0);
+ list_for_each_entry(bus, &pci_root_buses, node)
+ pcibios_allocate_resources(bus, 1);
e820_reserve_resources_late();
/*
