1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h
index 57ebf120f825..9763eeec7458 100644
--- a/drivers/s390/cio/css.h
+++ b/drivers/s390/cio/css.h
@@ -70,6 +70,11 @@ struct chp_link;
  * @probe: function called on probe
  * @remove: function called on remove
  * @shutdown: called at device shutdown
+ * @prepare: prepare for pm state transition
+ * @complete: undo work done in @prepare
+ * @freeze: callback for freezing during hibernation snapshotting
+ * @thaw: undo work done in @freeze
+ * @restore: callback for restoring after hibernation
  * @name: name of the device driver
  */
 struct css_driver {
@@ -82,6 +87,11 @@ struct css_driver {
         int (*probe)(struct subchannel *);
         int (*remove)(struct subchannel *);
         void (*shutdown)(struct subchannel *);
+        int (*prepare) (struct subchannel *);
+        void (*complete) (struct subchannel *);
+        int (*freeze)(struct subchannel *);
+        int (*thaw) (struct subchannel *);
+        int (*restore)(struct subchannel *);
         const char *name;
 };