diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index bf640fd..59a1b12 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -637,7 +637,7 @@
 	int error;
 
 	if (hibernation_mode == HIBERNATION_SUSPEND) {
-		error = suspend_devices_and_enter(PM_SUSPEND_MEM);
+		error = suspend_devices_and_enter(mem_sleep_current);
 		if (error) {
 			hibernation_mode = hibernation_ops ?
 						HIBERNATION_PLATFORM :
@@ -1323,7 +1323,7 @@
 	int rc = kstrtouint(str, 0, &resume_delay);
 
 	if (rc)
-		return rc;
+		pr_warn("resumedelay: bad option string '%s'\n", str);
 	return 1;
 }
 
diff --git a/kernel/power/suspend_test.c b/kernel/power/suspend_test.c
index e1ed58a..be480ae 100644
--- a/kernel/power/suspend_test.c
+++ b/kernel/power/suspend_test.c
@@ -157,22 +157,22 @@
 	value++;
 	suspend_type = strsep(&value, ",");
 	if (!suspend_type)
-		return 0;
+		return 1;
 
 	repeat = strsep(&value, ",");
 	if (repeat) {
 		if (kstrtou32(repeat, 0, &test_repeat_count_max))
-			return 0;
+			return 1;
 	}
 
 	for (i = PM_SUSPEND_MIN; i < PM_SUSPEND_MAX; i++)
 		if (!strcmp(pm_labels[i], suspend_type)) {
 			test_state_label = pm_labels[i];
-			return 0;
+			return 1;
 		}
 
 	printk(warn_bad_state, suspend_type);
-	return 0;
+	return 1;
 }
 __setup("test_suspend", setup_test_suspend);
 
diff --git a/kernel/power/user.c b/kernel/power/user.c
index 740723b..13cca2e 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -26,6 +26,7 @@
 
 #include "power.h"
 
+static bool need_wait;
 
 static struct snapshot_data {
 	struct snapshot_handle handle;
@@ -78,7 +79,7 @@
 		 * Resuming.  We may need to wait for the image device to
 		 * appear.
 		 */
-		wait_for_device_probe();
+		need_wait = true;
 
 		data->swap = -1;
 		data->mode = O_WRONLY;
@@ -168,6 +169,11 @@
 	ssize_t res;
 	loff_t pg_offp = *offp & ~PAGE_MASK;
 
+	if (need_wait) {
+		wait_for_device_probe();
+		need_wait = false;
+	}
+
 	lock_system_sleep();
 
 	data = filp->private_data;
@@ -244,6 +250,11 @@
 	loff_t size;
 	sector_t offset;
 
+	if (need_wait) {
+		wait_for_device_probe();
+		need_wait = false;
+	}
+
 	if (_IOC_TYPE(cmd) != SNAPSHOT_IOC_MAGIC)
 		return -ENOTTY;
 	if (_IOC_NR(cmd) > SNAPSHOT_IOC_MAXNR)