[1/2] acpiphp: execute ACPI _REG method for hotadded devices

Commit Message

Andrew Morton March 11, 2010, 10:08 p.m. UTC

None

Patch

diff -puN drivers/pci/hotplug/acpiphp_glue.c~acpiphp-execute-acpi-_reg-method-for-hotadded-devices drivers/pci/hotplug/acpiphp_glue.c
--- a/drivers/pci/hotplug/acpiphp_glue.c~acpiphp-execute-acpi-_reg-method-for-hotadded-devices
+++ a/drivers/pci/hotplug/acpiphp_glue.c
@@ -749,6 +749,24 @@  static int acpiphp_bus_trim(acpi_handle 
 	return retval;
 }
 
+static void acpiphp_set_acpi_region(struct acpiphp_slot *slot)
+{
+	struct acpiphp_func *func;
+	union acpi_object params[2];
+	struct acpi_object_list arg_list;
+
+	list_for_each_entry(func, &slot->funcs, sibling) {
+		arg_list.count = 2;
+		arg_list.pointer = params;
+		params[0].type = ACPI_TYPE_INTEGER;
+		params[0].integer.value = ACPI_ADR_SPACE_PCI_CONFIG;
+		params[1].type = ACPI_TYPE_INTEGER;
+		params[1].integer.value = 1;
+		/* _REG is optional, we don't care about if there is failure */
+		acpi_evaluate_object(func->handle, "_REG", &arg_list, NULL);
+	}
+}
+
 /**
  * enable_device - enable, configure a slot
  * @slot: slot to be enabled
@@ -805,6 +823,7 @@  static int __ref enable_device(struct ac
 	pci_bus_assign_resources(bus);
 	acpiphp_sanitize_bus(bus);
 	acpiphp_set_hpp_values(bus);
+	acpiphp_set_acpi_region(slot);
 	pci_enable_bridges(bus);
 	pci_bus_add_devices(bus);