Merge tag 'v3.15' into next

Linux 3.15

1 files changed, 46 insertions, 2 deletions

diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c
index 624e8dc2453..32f9236c959 100644
--- a/drivers/xen/manage.c
+++ b/drivers/xen/manage.c
@@ -46,6 +46,20 @@ struct suspend_info {
 	void (*post)(int cancelled);
 };
 
+static RAW_NOTIFIER_HEAD(xen_resume_notifier);
+
+void xen_resume_notifier_register(struct notifier_block *nb)
+{
+	raw_notifier_chain_register(&xen_resume_notifier, nb);
+}
+EXPORT_SYMBOL_GPL(xen_resume_notifier_register);
+
+void xen_resume_notifier_unregister(struct notifier_block *nb)
+{
+	raw_notifier_chain_unregister(&xen_resume_notifier, nb);
+}
+EXPORT_SYMBOL_GPL(xen_resume_notifier_unregister);
+
 #ifdef CONFIG_HIBERNATE_CALLBACKS
 static void xen_hvm_post_suspend(int cancelled)
 {
@@ -152,6 +166,8 @@ static void do_suspend(void)
 
 	err = stop_machine(xen_suspend, &si, cpumask_of(0));
 
+	raw_notifier_call_chain(&xen_resume_notifier, 0, NULL);
+
 	dpm_resume_start(si.cancelled ? PMSG_THAW : PMSG_RESTORE);
 
 	if (err) {
@@ -182,10 +198,32 @@ struct shutdown_handler {
 	void (*cb)(void);
 };
 
+static int poweroff_nb(struct notifier_block *cb, unsigned long code, void *unused)
+{
+	switch (code) {
+	case SYS_DOWN:
+	case SYS_HALT:
+	case SYS_POWER_OFF:
+		shutting_down = SHUTDOWN_POWEROFF;
+	default:
+		break;
+	}
+	return NOTIFY_DONE;
+}
 static void do_poweroff(void)
 {
-	shutting_down = SHUTDOWN_POWEROFF;
-	orderly_poweroff(false);
+	switch (system_state) {
+	case SYSTEM_BOOTING:
+		orderly_poweroff(true);
+		break;
+	case SYSTEM_RUNNING:
+		orderly_poweroff(false);
+		break;
+	default:
+		/* Don't do it when we are halting/rebooting. */
+		pr_info("Ignoring Xen toolstack shutdown.\n");
+		break;
+	}
 }
 
 static void do_reboot(void)
@@ -291,6 +329,10 @@ static struct xenbus_watch shutdown_watch = {
 	.callback = shutdown_handler
 };
 
+static struct notifier_block xen_reboot_nb = {
+	.notifier_call = poweroff_nb,
+};
+
 static int setup_shutdown_watcher(void)
 {
 	int err;
@@ -301,6 +343,7 @@ static int setup_shutdown_watcher(void)
 		return err;
 	}
 
+
 #ifdef CONFIG_MAGIC_SYSRQ
 	err = register_xenbus_watch(&sysrq_watch);
 	if (err) {
@@ -329,6 +372,7 @@ int xen_setup_shutdown_event(void)
 	if (!xen_domain())
 		return -ENODEV;
 	register_xenstore_notifier(&xenstore_notifier);
+	register_reboot_notifier(&xen_reboot_nb);
 
 	return 0;
 }