1 files changed, 19 insertions, 12 deletions

diff --git a/kernel/power/user.c b/kernel/power/user.c
index b902a7e3bd12..f5512cb3aa86 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -67,6 +67,7 @@ atomic_t snapshot_device_available = ATOMIC_INIT(1);
 static int snapshot_open(struct inode *inode, struct file *filp)
 {
         struct snapshot_data *data;
+        int error;
 
         if (!atomic_add_unless(&snapshot_device_available, -1, 0))
                 return -EBUSY;
@@ -87,9 +88,19 @@ static int snapshot_open(struct inode *inode, struct file *filp)
                 data->swap = swsusp_resume_device ?
                         swap_type_of(swsusp_resume_device, 0, NULL) : -1;
                 data->mode = O_RDONLY;
+                error = pm_notifier_call_chain(PM_RESTORE_PREPARE);
+                if (error)
+                        pm_notifier_call_chain(PM_POST_RESTORE);
         } else {
                 data->swap = -1;
                 data->mode = O_WRONLY;
+                error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE);
+                if (error)
+                        pm_notifier_call_chain(PM_POST_HIBERNATION);
+        }
+        if (error) {
+                atomic_inc(&snapshot_device_available);
+                return error;
         }
         data->frozen = 0;
         data->ready = 0;
@@ -111,6 +122,8 @@ static int snapshot_release(struct inode *inode, struct file *filp)
                 thaw_processes();
                 mutex_unlock(&pm_mutex);
         }
+        pm_notifier_call_chain(data->mode == O_WRONLY ?
+                        PM_POST_HIBERNATION : PM_POST_RESTORE);
         atomic_inc(&snapshot_device_available);
         return 0;
 }
@@ -174,18 +187,13 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
                 if (data->frozen)
                         break;
                 mutex_lock(&pm_mutex);
-                error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE);
-                if (!error) {
-                        printk("Syncing filesystems ... ");
-                        sys_sync();
-                        printk("done.\n");
-
-                        error = freeze_processes();
-                        if (error)
-                                thaw_processes();
-                }
+                printk("Syncing filesystems ... ");
+                sys_sync();
+                printk("done.\n");
+
+                error = freeze_processes();
                 if (error)
-                        pm_notifier_call_chain(PM_POST_HIBERNATION);
+                        thaw_processes();
                 mutex_unlock(&pm_mutex);
                 if (!error)
                         data->frozen = 1;
@@ -196,7 +204,6 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
                         break;
                 mutex_lock(&pm_mutex);
                 thaw_processes();
-                pm_notifier_call_chain(PM_POST_HIBERNATION);
                 mutex_unlock(&pm_mutex);
                 data->frozen = 0;
                 break;