Devices under hot-added hostbridge have no chance to assign resources
and to configure them, so this patch adds such code for hot-added
hostbridges at acpi_pci_root_start().
diff: updated according to Yinhai's comment
disconnect dependency on CONFIG_HOTPLUG
Signed-off-by: Taku Izumi <izumi.taku@xxxxxxxxxxxxxx>
---
drivers/acpi/pci_root.c | 13 +++++++++++++
include/acpi/acpi_bus.h | 1 +
2 files changed, 14 insertions(+)
Index: Bjorn-next-0925/drivers/acpi/pci_root.c
===================================================================
--- Bjorn-next-0925.orig/drivers/acpi/pci_root.c
+++ Bjorn-next-0925/drivers/acpi/pci_root.c
@@ -628,6 +628,9 @@ static int __devinit acpi_pci_root_add(s
if (device->wakeup.flags.run_wake)
device_set_run_wake(root->bus->bridge, true);
+ if (system_state != SYSTEM_BOOTING)
+ root->hot_added = true;
+
return 0;
out_del_root:
@@ -644,6 +647,16 @@ static int acpi_pci_root_start(struct ac
struct acpi_pci_root *root = acpi_driver_data(device);
struct acpi_pci_driver *driver;
+ /*
+ * Devices under hot-added hostbridge have no chance to assign
+ * resources and to configure them, so do that here
+ */
+ if (root->hot_added) {
+ pci_bus_size_bridges(root->bus);
+ pci_bus_assign_resources(root->bus);
+ pci_enable_bridges(root->bus);
+ }
+
mutex_lock(&acpi_pci_root_lock);
list_for_each_entry(driver, &acpi_pci_drivers, node)
if (driver->add)
Index: Bjorn-next-0925/include/acpi/acpi_bus.h
===================================================================
--- Bjorn-next-0925.orig/include/acpi/acpi_bus.h
+++ Bjorn-next-0925/include/acpi/acpi_bus.h
@@ -407,6 +407,7 @@ struct acpi_pci_root {
u32 osc_support_set; /* _OSC state of support bits */
u32 osc_control_set; /* _OSC state of control bits */
phys_addr_t mcfg_addr;
+ bool hot_added;
};
/* helper */
--
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