[S390] cio: Introduce ccw_bus_type.shutdown.

Introduce a shutdown method for the ccw bus that calls the driver
specific shutdown method in struct ccw_driver.
Switch zfcp to the new ccw_driver shutdown method.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

3 files changed, 16 insertions, 6 deletions

diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 3943a4fde22a..7fb271c60c27 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -1433,12 +1433,22 @@ ccw_device_remove (struct device *dev)
         return 0;
 }
 
+static void ccw_device_shutdown(struct device *dev)
+{
+        struct ccw_device *cdev;
+
+        cdev = to_ccwdev(dev);
+        if (cdev->drv && cdev->drv->shutdown)
+                cdev->drv->shutdown(cdev);
+}
+
 struct bus_type ccw_bus_type = {
         .name   = "ccw",
         .match  = ccw_bus_match,
         .uevent = ccw_uevent,
         .probe  = ccw_device_probe,
         .remove = ccw_device_remove,
+        .shutdown = ccw_device_shutdown,
 };
 
 /**
diff --git a/drivers/s390/scsi/zfcp_ccw.c b/drivers/s390/scsi/zfcp_ccw.c
index 1c8f71a59855..c0d1c0eb3209 100644
--- a/drivers/s390/scsi/zfcp_ccw.c
+++ b/drivers/s390/scsi/zfcp_ccw.c
@@ -28,7 +28,7 @@ static void zfcp_ccw_remove(struct ccw_device *);
 static int zfcp_ccw_set_online(struct ccw_device *);
 static int zfcp_ccw_set_offline(struct ccw_device *);
 static int zfcp_ccw_notify(struct ccw_device *, int);
-static void zfcp_ccw_shutdown(struct device *);
+static void zfcp_ccw_shutdown(struct ccw_device *);
 
 static struct ccw_device_id zfcp_ccw_device_id[] = {
         {CCW_DEVICE_DEVTYPE(ZFCP_CONTROL_UNIT_TYPE,
@@ -51,9 +51,7 @@ static struct ccw_driver zfcp_ccw_driver = {
         .set_online  = zfcp_ccw_set_online,
         .set_offline = zfcp_ccw_set_offline,
         .notify      = zfcp_ccw_notify,
-        .driver      = {
-                .shutdown = zfcp_ccw_shutdown,
-        },
+        .shutdown    = zfcp_ccw_shutdown,
 };
 
 MODULE_DEVICE_TABLE(ccw, zfcp_ccw_device_id);
@@ -277,12 +275,12 @@ zfcp_ccw_register(void)
  * Makes sure that QDIO queues are down when the system gets stopped.
  */
 static void
-zfcp_ccw_shutdown(struct device *dev)
+zfcp_ccw_shutdown(struct ccw_device *cdev)
 {
         struct zfcp_adapter *adapter;
 
         down(&zfcp_data.config_sema);
-        adapter = dev_get_drvdata(dev);
+        adapter = dev_get_drvdata(&cdev->dev);
         zfcp_erp_adapter_shutdown(adapter, 0);
         zfcp_erp_wait(adapter);
         up(&zfcp_data.config_sema);
diff --git a/include/asm-s390/ccwdev.h b/include/asm-s390/ccwdev.h
index 8e961aa4b394..066aa70518ce 100644
--- a/include/asm-s390/ccwdev.h
+++ b/include/asm-s390/ccwdev.h
@@ -102,6 +102,7 @@ struct ccw_device {
  * @set_online: called when setting device online
  * @set_offline: called when setting device offline
  * @notify: notify driver of device state changes
+ * @shutdown: called at device shutdown
  * @driver: embedded device driver structure
  * @name: device driver name
  */
@@ -113,6 +114,7 @@ struct ccw_driver {
         int (*set_online) (struct ccw_device *);
         int (*set_offline) (struct ccw_device *);
         int (*notify) (struct ccw_device *, int);
+        void (*shutdown) (struct ccw_device *);
         struct device_driver driver;
         char *name;
 };