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-rw-r--r--kernel/power/user.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/kernel/power/user.c b/kernel/power/user.c
index bbd4842..3f1539f 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -266,6 +266,42 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
}
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;
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