diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index a200c5f..873cdf8 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -58,6 +58,7 @@
 
 static void power_down(suspend_disk_method_t mode)
 {
+	disable_nonboot_cpus();
 	switch(mode) {
 	case PM_DISK_PLATFORM:
 		if (pm_ops && pm_ops->enter) {
diff --git a/kernel/power/user.c b/kernel/power/user.c
index dd09efe..d6a8dcc 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -398,9 +398,10 @@
 
 		case PMOPS_ENTER:
 			if (data->platform_suspend) {
+				disable_nonboot_cpus();
 				kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK);
 				error = pm_ops->enter(PM_SUSPEND_DISK);
-				error = 0;
+				enable_nonboot_cpus();
 			}
 			break;