case SNAPSHOT_FREEZE:
if (data->frozen)
break;
- sys_sync();
down(&pm_sem);
- pm_prepare_console();
disable_nonboot_cpus();
if (freeze_processes()) {
thaw_processes();
enable_nonboot_cpus();
- pm_restore_console();
error = -EBUSY;
}
up(&pm_sem);
down(&pm_sem);
thaw_processes();
enable_nonboot_cpus();
- pm_restore_console();
up(&pm_sem);
data->frozen = 0;
break;
}
break;
+ case SNAPSHOT_S2RAM:
+ if (!data->frozen) {
+ error = -EPERM;
+ break;
+ }
+
+ if (down_trylock(&pm_sem)) {
+ error = -EBUSY;
+ break;
+ }
+
+ if (pm_ops->prepare) {
+ error = pm_ops->prepare(PM_SUSPEND_MEM);
+ if (error)
+ goto OutS3;
+ }
+
+ /* Put devices to sleep */
+ error = device_suspend(PMSG_SUSPEND);
+ if (error) {
+ printk(KERN_ERR "Failed to suspend some devices.\n");
+ } else {
+ /* Enter S3, system is already frozen */
+ suspend_enter(PM_SUSPEND_MEM);
+
+ /* Wake up devices */
+ device_resume();
+ }
+
+ if (pm_ops->finish)
+ pm_ops->finish(PM_SUSPEND_MEM);
+
+OutS3:
+ up(&pm_sem);
+ break;
+
default:
error = -ENOTTY;