[S390] cio: introduce ccw_device_schedule_sch_unregister

Introduce ccw_device_schedule_sch_unregister as a wrapper for queuing
ccw_device_call_sch_unregister on the slow_path_wq. This wrapper
will be used in the next patch.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

2 files changed, 12 insertions, 10 deletions

diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 9f016fef6101..cdbf664ed446 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -310,8 +310,6 @@ static void ccw_device_remove_orphan_cb(struct work_struct *work)
         put_device(&cdev->dev);
 }
 
-static void ccw_device_call_sch_unregister(struct work_struct *work);
-
 static void
 ccw_device_remove_disconnected(struct ccw_device *cdev)
 {
@@ -335,11 +333,10 @@ ccw_device_remove_disconnected(struct ccw_device *cdev)
                 spin_unlock_irqrestore(cdev->ccwlock, flags);
                 PREPARE_WORK(&cdev->private->kick_work,
                                 ccw_device_remove_orphan_cb);
+                queue_work(slow_path_wq, &cdev->private->kick_work);
         } else
                 /* Deregister subchannel, which will kill the ccw device. */
-                PREPARE_WORK(&cdev->private->kick_work,
-                                ccw_device_call_sch_unregister);
-        queue_work(slow_path_wq, &cdev->private->kick_work);
+                ccw_device_schedule_sch_unregister(cdev);
 }
 
 /**
@@ -1020,6 +1017,13 @@ static void ccw_device_call_sch_unregister(struct work_struct *work)
         put_device(&sch->dev);
 }
 
+void ccw_device_schedule_sch_unregister(struct ccw_device *cdev)
+{
+        PREPARE_WORK(&cdev->private->kick_work,
+                     ccw_device_call_sch_unregister);
+        queue_work(slow_path_wq, &cdev->private->kick_work);
+}
+
 /*
  * subchannel recognition done. Called from the state machine.
  */
@@ -1036,9 +1040,7 @@ io_subchannel_recog_done(struct ccw_device *cdev)
                 /* Remove device found not operational. */
                 if (!get_device(&cdev->dev))
                         break;
-                PREPARE_WORK(&cdev->private->kick_work,
-                             ccw_device_call_sch_unregister);
-                queue_work(slow_path_wq, &cdev->private->kick_work);
+                ccw_device_schedule_sch_unregister(cdev);
                 if (atomic_dec_and_test(&ccw_device_init_count))
                         wake_up(&ccw_device_init_wq);
                 break;
@@ -1557,8 +1559,7 @@ static int purge_fn(struct device *dev, void *data)
                 goto out;
         CIO_MSG_EVENT(3, "ccw: purging 0.%x.%04x\n", priv->dev_id.ssid,
                       priv->dev_id.devno);
-        PREPARE_WORK(&cdev->private->kick_work, ccw_device_call_sch_unregister);
-        queue_work(slow_path_wq, &cdev->private->kick_work);
+        ccw_device_schedule_sch_unregister(cdev);
 
 out:
         /* Abort loop in case of pending signal. */
diff --git a/drivers/s390/cio/device.h b/drivers/s390/cio/device.h
index 85e01846ca65..f1cbbd94ad4e 100644
--- a/drivers/s390/cio/device.h
+++ b/drivers/s390/cio/device.h
@@ -87,6 +87,7 @@ int ccw_device_is_orphan(struct ccw_device *);
 int ccw_device_recognition(struct ccw_device *);
 int ccw_device_online(struct ccw_device *);
 int ccw_device_offline(struct ccw_device *);
+void ccw_device_schedule_sch_unregister(struct ccw_device *);
 int ccw_purge_blacklisted(void);
 
 /* Function prototypes for device status and basic sense stuff. */