Fix double completion in engine_wi

src/engine/engine_inv.c

@@ -36,8 +36,6 @@ static int _ocf_invalidate_do(struct ocf_request *req)
 {
 	struct ocf_cache *cache = req->cache;
 
-	ENV_BUG_ON(env_atomic_read(&req->req_remaining));
-
 	ocf_hb_req_prot_lock_wr(req);
 	ocf_purge_map_info(req);
 	ocf_hb_req_prot_unlock_wr(req);

src/engine/engine_wi.c

@@ -77,8 +77,6 @@ static int ocf_write_wi_update_and_flush_metadata(struct ocf_request *req)
 
 	/* There are mapped cache line, need to remove them */
 
-	env_atomic_set(&req->req_remaining, 1); /* One core IO */
-
 	ocf_hb_req_prot_lock_wr(req); /*- Metadata WR access ---------------*/
 
 	/* Remove mapped cache lines from metadata */
@@ -90,6 +88,8 @@ static int ocf_write_wi_update_and_flush_metadata(struct ocf_request *req)
 		/* Request was dirty and need to flush metadata */
 		ocf_metadata_flush_do_asynch(cache, req,
 				_ocf_write_wi_io_flush_metadata);
+
+		return 0;
 	}
 
 	_ocf_write_wi_io_flush_metadata(req, 0);

src/engine/engine_zero.c

@@ -103,7 +103,6 @@ static int _ocf_zero_do(struct ocf_request *req)
 	ocf_zero_map_info(req);
 
 	/* Discard marked cache lines */
-	env_atomic_set(&req->req_remaining, 1);
 	if (req->info.flush_metadata) {
 		/* Request was dirty and need to flush metadata */
 		ocf_metadata_flush_do_asynch(cache, req,

src/metadata/metadata.c

@@ -1191,8 +1191,6 @@ void ocf_metadata_flush_do_asynch(struct ocf_cache *cache,
 	 * line persistent in case of recovery
 	 */
 
-	env_atomic_inc(&req->req_remaining); /* Core device IO */
-
 	result |= ocf_metadata_raw_flush_do_asynch(cache, req,
 			&(ctrl->raw_desc[metadata_segment_collision]),
 			complete);