summaryrefslogtreecommitdiffstats
path: root/kernel/power/user.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/power/user.c')
-rw-r--r--kernel/power/user.c31
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;