extern int conn_lowest_minor(struct drbd_tconn *tconn);
 enum drbd_ret_code conn_new_minor(struct drbd_tconn *tconn, unsigned int minor, int vnr);
 extern void drbd_free_mdev(struct drbd_conf *mdev);
-extern void drbd_delete_device(unsigned int minor);
+extern void drbd_delete_device(struct drbd_conf *mdev);
 
 struct drbd_tconn *drbd_new_tconn(const char *name);
 extern void drbd_free_tconn(struct drbd_tconn *tconn);
 
 }
 
 /* caution. no locking. */
-void drbd_delete_device(unsigned int minor)
+void drbd_delete_device(struct drbd_conf *mdev)
 {
-       struct drbd_conf *mdev = minor_to_mdev(minor);
-
-       if (!mdev)
-               return;
-
        idr_remove(&mdev->tconn->volumes, mdev->vnr);
-       idr_remove(&minors, minor);
+       idr_remove(&minors, mdev_to_minor(mdev));
        synchronize_rcu();
 
        /* paranoia asserts */
        drbd_genl_unregister();
 
        idr_for_each_entry(&minors, mdev, i)
-               drbd_delete_device(i);
+               drbd_delete_device(mdev);
+
        drbd_destroy_mempools();
        unregister_blkdev(DRBD_MAJOR, "drbd");
 
 
             * we may want to delete a minor from a live replication group.
             */
            mdev->state.role == R_SECONDARY) {
-               drbd_delete_device(mdev_to_minor(mdev));
+               drbd_delete_device(mdev);
                return NO_ERROR;
        } else
                return ERR_MINOR_CONFIGURED;