s390/cio: move ccw_device_stlck functions

device_ops.c should only contain functions that are called by ccw device
drivers. Move the cio internal functions that handle unconditional
reserve + release to device_pgid.c

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

drivers/s390/cio/device_ops.c

@@ -456,67 +456,6 @@ __u8 ccw_device_get_path_mask(struct ccw_device *cdev)
 	return sch->lpm;
 }
 
-struct stlck_data {
-	struct completion done;
-	int rc;
-};
-
-void ccw_device_stlck_done(struct ccw_device *cdev, void *data, int rc)
-{
-	struct stlck_data *sdata = data;
-
-	sdata->rc = rc;
-	complete(&sdata->done);
-}
-
-/*
- * Perform unconditional reserve + release.
- */
-int ccw_device_stlck(struct ccw_device *cdev)
-{
-	struct subchannel *sch = to_subchannel(cdev->dev.parent);
-	struct stlck_data data;
-	u8 *buffer;
-	int rc;
-
-	/* Check if steal lock operation is valid for this device. */
-	if (cdev->drv) {
-		if (!cdev->private->options.force)
-			return -EINVAL;
-	}
-	buffer = kzalloc(64, GFP_DMA | GFP_KERNEL);
-	if (!buffer)
-		return -ENOMEM;
-	init_completion(&data.done);
-	data.rc = -EIO;
-	spin_lock_irq(sch->lock);
-	rc = cio_enable_subchannel(sch, (u32) (addr_t) sch);
-	if (rc)
-		goto out_unlock;
-	/* Perform operation. */
-	cdev->private->state = DEV_STATE_STEAL_LOCK;
-	ccw_device_stlck_start(cdev, &data, &buffer[0], &buffer[32]);
-	spin_unlock_irq(sch->lock);
-	/* Wait for operation to finish. */
-	if (wait_for_completion_interruptible(&data.done)) {
-		/* Got a signal. */
-		spin_lock_irq(sch->lock);
-		ccw_request_cancel(cdev);
-		spin_unlock_irq(sch->lock);
-		wait_for_completion(&data.done);
-	}
-	rc = data.rc;
-	/* Check results. */
-	spin_lock_irq(sch->lock);
-	cio_disable_subchannel(sch);
-	cdev->private->state = DEV_STATE_BOXED;
-out_unlock:
-	spin_unlock_irq(sch->lock);
-	kfree(buffer);
-
-	return rc;
-}
-
 /**
  * chp_get_chp_desc - return newly allocated channel-path descriptor
  * @cdev: device to obtain the descriptor for