[S390] cio: Add shutdown callback for ccwgroup.

This intendeds to make proper shutdown of qeth devices easier.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/cio/ccwgroup.c

@@ -391,12 +391,24 @@ ccwgroup_remove (struct device *dev)
 	return 0;
 }
 
+static void ccwgroup_shutdown(struct device *dev)
+{
+	struct ccwgroup_device *gdev;
+	struct ccwgroup_driver *gdrv;
+
+	gdev = to_ccwgroupdev(dev);
+	gdrv = to_ccwgroupdrv(dev->driver);
+	if (gdrv && gdrv->shutdown)
+		gdrv->shutdown(gdev);
+}
+
 static struct bus_type ccwgroup_bus_type = {
 	.name   = "ccwgroup",
 	.match  = ccwgroup_bus_match,
 	.uevent = ccwgroup_uevent,
 	.probe  = ccwgroup_probe,
 	.remove = ccwgroup_remove,
+	.shutdown = ccwgroup_shutdown,
 };
 
 /**

include/asm-s390/ccwgroup.h

@@ -37,6 +37,7 @@ struct ccwgroup_device {
  * @remove: function called on remove
  * @set_online: function called when device is set online
  * @set_offline: function called when device is set offline
+ * @shutdown: function called when device is shut down
  * @driver: embedded driver structure
  */
 struct ccwgroup_driver {
@@ -49,6 +50,7 @@ struct ccwgroup_driver {
 	void (*remove) (struct ccwgroup_device *);
 	int (*set_online) (struct ccwgroup_device *);
 	int (*set_offline) (struct ccwgroup_device *);
+	void (*shutdown)(struct ccwgroup_device *);
 
 	struct device_driver driver;
 };