BLKIF_RSP_ERROR
status = BLKIF_RSP_ERROR;
pending_req->status = BLKIF_RSP_ERROR;
make_response(ring, req->u.rw.id, req_operation, BLKIF_RSP_ERROR);
case BLKIF_RSP_ERROR:
return BLKIF_RSP_ERROR;
if (unlikely(bret.status == BLKIF_RSP_ERROR &&