From owner-svn-src-stable@freebsd.org Fri Sep 23 08:24:42 2016 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 4ABECBE64AF; Fri, 23 Sep 2016 08:24:42 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 03025105E; Fri, 23 Sep 2016 08:24:41 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u8N8OfiP050101; Fri, 23 Sep 2016 08:24:41 GMT (envelope-from hselasky@FreeBSD.org) Received: (from hselasky@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u8N8OfEJ050100; Fri, 23 Sep 2016 08:24:41 GMT (envelope-from hselasky@FreeBSD.org) Message-Id: <201609230824.u8N8OfEJ050100@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: hselasky set sender to hselasky@FreeBSD.org using -f From: Hans Petter Selasky Date: Fri, 23 Sep 2016 08:24:41 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r306240 - stable/11/sys/dev/mlx5/mlx5_en X-SVN-Group: stable-11 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Sep 2016 08:24:42 -0000 Author: hselasky Date: Fri Sep 23 08:24:41 2016 New Revision: 306240 URL: https://svnweb.freebsd.org/changeset/base/306240 Log: MFC r305874: mlx5en: Allow setting the software MTU size below 1500 bytes The hardware MTU size can't be set to a value less than 1500 bytes due to side-band management support. Allow setting the software MTU size below 1500 bytes, thus creating a mismatch between hardware and software MTU sizes. Sponsored by: Mellanox Technologies Modified: stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_main.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_main.c ============================================================================== --- stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_main.c Fri Sep 23 08:23:57 2016 (r306239) +++ stable/11/sys/dev/mlx5/mlx5_en/mlx5_en_main.c Fri Sep 23 08:24:41 2016 (r306240) @@ -2173,7 +2173,6 @@ mlx5e_set_dev_port_mtu(struct ifnet *ifp int hw_mtu; int err; - err = mlx5_set_port_mtu(mdev, MLX5E_SW2HW_MTU(sw_mtu)); if (err) { if_printf(ifp, "%s: mlx5_set_port_mtu failed setting %d, err=%d\n", @@ -2181,19 +2180,20 @@ mlx5e_set_dev_port_mtu(struct ifnet *ifp return (err); } err = mlx5_query_port_oper_mtu(mdev, &hw_mtu); - if (!err) { - ifp->if_mtu = MLX5E_HW2SW_MTU(hw_mtu); - - if (ifp->if_mtu != sw_mtu) { - if_printf(ifp, "Port MTU %d is different than " - "ifp mtu %d\n", sw_mtu, (int)ifp->if_mtu); - } - } else { + if (err) { if_printf(ifp, "Query port MTU, after setting new " "MTU value, failed\n"); - ifp->if_mtu = sw_mtu; + } else if (MLX5E_HW2SW_MTU(hw_mtu) < sw_mtu) { + err = -E2BIG, + if_printf(ifp, "Port MTU %d is smaller than " + "ifp mtu %d\n", hw_mtu, sw_mtu); + } else if (MLX5E_HW2SW_MTU(hw_mtu) > sw_mtu) { + err = -EINVAL; + if_printf(ifp, "Port MTU %d is bigger than " + "ifp mtu %d\n", hw_mtu, sw_mtu); } - return (0); + ifp->if_mtu = sw_mtu; + return (err); } int