RPCRDMA_MAX_HDR_SEGS
if (attrs->max_sge_rd > RPCRDMA_MAX_HDR_SEGS)
if (ep->re_max_rdma_segs > RPCRDMA_MAX_HDR_SEGS)
ep->re_max_rdma_segs = RPCRDMA_MAX_HDR_SEGS;