X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=kernel%2Fpower%2Fuser.c;h=5bd321bcbb75f06031d6ede749cad599c251373c;hb=db292ca302e83534f5f0f7139e13d7e6976e51f9;hp=1f24f30b951b718692e8581c0795fbb2d3eb8b6a;hpb=a634cc10164d1c229fbeca33923e6a0ed939e894;p=linux-2.6

diff --git a/kernel/power/user.c b/kernel/power/user.c
index 1f24f30b95..5bd321bcbb 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -151,10 +151,18 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
 		if (data->frozen)
 			break;
 		mutex_lock(&pm_mutex);
-		if (freeze_processes()) {
-			thaw_processes();
-			error = -EBUSY;
+		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();
 		}
+		if (error)
+			pm_notifier_call_chain(PM_POST_HIBERNATION);
 		mutex_unlock(&pm_mutex);
 		if (!error)
 			data->frozen = 1;
@@ -165,6 +173,7 @@ 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;
@@ -250,47 +259,19 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
 		break;
 
 	case SNAPSHOT_S2RAM:
-		if (!pm_ops) {
-			error = -ENOSYS;
-			break;
-		}
-
 		if (!data->frozen) {
 			error = -EPERM;
 			break;
 		}
-
 		if (!mutex_trylock(&pm_mutex)) {
 			error = -EBUSY;
 			break;
 		}
-
-		if (pm_ops->prepare) {
-			error = pm_ops->prepare(PM_SUSPEND_MEM);
-			if (error)
-				goto OutS3;
-		}
-
-		/* Put devices to sleep */
-		suspend_console();
-		error = device_suspend(PMSG_SUSPEND);
-		if (error) {
-			printk(KERN_ERR "Failed to suspend some devices.\n");
-		} else {
-			error = disable_nonboot_cpus();
-			if (!error) {
-				/* Enter S3, system is already frozen */
-				suspend_enter(PM_SUSPEND_MEM);
-				enable_nonboot_cpus();
-			}
-			/* Wake up devices */
-			device_resume();
-		}
-		resume_console();
-		if (pm_ops->finish)
-			pm_ops->finish(PM_SUSPEND_MEM);
-
- OutS3:
+		/*
+		 * Tasks are frozen and the notifiers have been called with
+		 * PM_HIBERNATION_PREPARE
+		 */
+		error = suspend_devices_and_enter(PM_SUSPEND_MEM);
 		mutex_unlock(&pm_mutex);
 		break;