s390/scm: reorder scm_remove

Do not reset drvdata before the block device is cleaned up. With a
non-empty block queue drvdata could be accessed.
Signed-off-by: NSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/block/scm_drv.c

@@ -52,8 +52,8 @@ static int scm_remove(struct scm_device *scmdev)
 {
 	struct scm_blk_dev *bdev = dev_get_drvdata(&scmdev->dev);
 
-	dev_set_drvdata(&scmdev->dev, NULL);
 	scm_blk_dev_cleanup(bdev);
+	dev_set_drvdata(&scmdev->dev, NULL);
 	kfree(bdev);
 
 	return 0;