ACPI: Reevaluate C/P/T states when a cpu becomes online

[~andy/linux] / drivers / acpi / processor_core.c

diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 498422343f38a64550532c9ab8733d94397322d5..2afb3d2086b3d03b3e4858caffba20f6f456c90f 100644 (file)
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -698,16 +698,23 @@ static void acpi_processor_notify(acpi_handle handle, u32 event, void *data)
        switch (event) {
        case ACPI_PROCESSOR_NOTIFY_PERFORMANCE:
                acpi_processor_ppc_has_changed(pr);
-               acpi_bus_generate_event(device, event,
+               acpi_bus_generate_proc_event(device, event,
                                        pr->performance_platform_limit);
+               acpi_bus_generate_netlink_event(device->pnp.device_class,
+                                                 device->dev.bus_id, event,
+                                                 pr->performance_platform_limit);
                break;
        case ACPI_PROCESSOR_NOTIFY_POWER:
                acpi_processor_cst_has_changed(pr);
-               acpi_bus_generate_event(device, event, 0);
+               acpi_bus_generate_proc_event(device, event, 0);
+               acpi_bus_generate_netlink_event(device->pnp.device_class,
+                                                 device->dev.bus_id, event, 0);
                break;
        case ACPI_PROCESSOR_NOTIFY_THROTTLING:
                acpi_processor_tstate_has_changed(pr);
-               acpi_bus_generate_event(device, event, 0);
+               acpi_bus_generate_proc_event(device, event, 0);
+               acpi_bus_generate_netlink_event(device->pnp.device_class,
+                                                 device->dev.bus_id, event, 0);
        default:
                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                                  "Unsupported event [0x%x]\n", event));
@@ -717,6 +724,25 @@ static void acpi_processor_notify(acpi_handle handle, u32 event, void *data)
        return;
 }
 
+static int acpi_cpu_soft_notify(struct notifier_block *nfb,
+               unsigned long action, void *hcpu)
+{
+       unsigned int cpu = (unsigned long)hcpu;
+       struct acpi_processor *pr = processors[cpu];
+
+       if (action == CPU_ONLINE && pr) {
+               acpi_processor_ppc_has_changed(pr);
+               acpi_processor_cst_has_changed(pr);
+               acpi_processor_tstate_has_changed(pr);
+       }
+       return NOTIFY_OK;
+}
+
+static struct notifier_block acpi_cpu_notifier =
+{
+           .notifier_call = acpi_cpu_soft_notify,
+};
+
 static int acpi_processor_add(struct acpi_device *device)
 {
        struct acpi_processor *pr = NULL;
@@ -980,6 +1006,7 @@ void acpi_processor_install_hotplug_notify(void)
                            ACPI_UINT32_MAX,
                            processor_walk_namespace_cb, &action, NULL);
 #endif
+       register_hotcpu_notifier(&acpi_cpu_notifier);
 }
 
 static
@@ -992,6 +1019,7 @@ void acpi_processor_uninstall_hotplug_notify(void)
                            ACPI_UINT32_MAX,
                            processor_walk_namespace_cb, &action, NULL);
 #endif
+       unregister_hotcpu_notifier(&acpi_cpu_notifier);
 }
 
 /*