PM: Fix pm_notifiers during user mode hibernation

Snapshot device is opened with O_RDONLY during suspend and O_WRONLY durig
resume. Make sure we also call notifiers with correct parameter telling
them what we are really doing.

Signed-off-by: Andrey Borzenkov <[e-mail]>
Signed-off-by: Rafael J. Wysocki <[e-mail]>
Cc: Len Brown <[e-mail]>
Cc: Greg KH <[e-mail]>
Acked-by: Pavel Machek <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

kernel/power/user.c

···
 		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);
+	} else {
+		data->swap = -1;
+		data->mode = O_WRONLY;
+		error = pm_notifier_call_chain(PM_RESTORE_PREPARE);
+		if (error)
+			pm_notifier_call_chain(PM_POST_RESTORE);
 	}
 	if (error)
 		atomic_inc(&snapshot_device_available);