- if (dm_md_type_request_based(md) && !dm_init_request_based_queue(md)) {
- DMWARN("Cannot initialize queue for request-based mapped device");
- return -EINVAL;
+ if (dm_md_type_request_based(md)) {
+ if (!dm_init_request_based_queue(md)) {
+ DMWARN("Cannot initialize queue for request-based mapped device");
+ return -EINVAL;
+ }
+ } else {
+ /* bio-based specific initialization */
+ blk_queue_make_request(md->queue, dm_make_request);
+ blk_queue_merge_bvec(md->queue, dm_merge_bvec);