Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934465AbcJQT6a (ORCPT ); Mon, 17 Oct 2016 15:58:30 -0400 Received: from mx1.redhat.com ([209.132.183.28]:45310 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758812AbcJQTyd (ORCPT ); Mon, 17 Oct 2016 15:54:33 -0400 From: Jarod Wilson To: linux-kernel@vger.kernel.org Cc: Jarod Wilson , netdev@vger.kernel.org, Realtek linux nic maintainers Subject: [PATCH net-next 07/15] ethernet/realtek: use core min/max MTU checking Date: Mon, 17 Oct 2016 15:54:09 -0400 Message-Id: <20161017195417.48259-8-jarod@redhat.com> In-Reply-To: <20161017195417.48259-1-jarod@redhat.com> References: <20161017195417.48259-1-jarod@redhat.com> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Mon, 17 Oct 2016 19:54:33 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3489 Lines: 104 8139cp: min_mtu 60, max_mtu 4096 8139too: min_mtu 68, max_mtu 1770 r8169: min_mtu 60, max_mtu depends on chipset, 1500 to 9k-ish CC: netdev@vger.kernel.org CC: Realtek linux nic maintainers Signed-off-by: Jarod Wilson --- drivers/net/ethernet/realtek/8139cp.c | 8 ++++---- drivers/net/ethernet/realtek/8139too.c | 13 ++++--------- drivers/net/ethernet/realtek/r8169.c | 8 ++++---- 3 files changed, 12 insertions(+), 17 deletions(-) diff --git a/drivers/net/ethernet/realtek/8139cp.c b/drivers/net/ethernet/realtek/8139cp.c index 5297bf7..b7c89eb 100644 --- a/drivers/net/ethernet/realtek/8139cp.c +++ b/drivers/net/ethernet/realtek/8139cp.c @@ -1277,10 +1277,6 @@ static int cp_change_mtu(struct net_device *dev, int new_mtu) { struct cp_private *cp = netdev_priv(dev); - /* check for invalid MTU, according to hardware limits */ - if (new_mtu < CP_MIN_MTU || new_mtu > CP_MAX_MTU) - return -EINVAL; - /* if network interface not up, no need for complexity */ if (!netif_running(dev)) { dev->mtu = new_mtu; @@ -2010,6 +2006,10 @@ static int cp_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO | NETIF_F_HIGHDMA; + /* MTU range: 60 - 4096 */ + dev->min_mtu = CP_MIN_MTU; + dev->max_mtu = CP_MAX_MTU; + rc = register_netdev(dev); if (rc) goto err_out_iomap; diff --git a/drivers/net/ethernet/realtek/8139too.c b/drivers/net/ethernet/realtek/8139too.c index da4c2d8..9bc047a 100644 --- a/drivers/net/ethernet/realtek/8139too.c +++ b/drivers/net/ethernet/realtek/8139too.c @@ -924,19 +924,10 @@ static int rtl8139_set_features(struct net_device *dev, netdev_features_t featur return 0; } -static int rtl8139_change_mtu(struct net_device *dev, int new_mtu) -{ - if (new_mtu < 68 || new_mtu > MAX_ETH_DATA_SIZE) - return -EINVAL; - dev->mtu = new_mtu; - return 0; -} - static const struct net_device_ops rtl8139_netdev_ops = { .ndo_open = rtl8139_open, .ndo_stop = rtl8139_close, .ndo_get_stats64 = rtl8139_get_stats64, - .ndo_change_mtu = rtl8139_change_mtu, .ndo_validate_addr = eth_validate_addr, .ndo_set_mac_address = rtl8139_set_mac_address, .ndo_start_xmit = rtl8139_start_xmit, @@ -1022,6 +1013,10 @@ static int rtl8139_init_one(struct pci_dev *pdev, dev->hw_features |= NETIF_F_RXALL; dev->hw_features |= NETIF_F_RXFCS; + /* MTU range: 68 - 1770 */ + dev->min_mtu = ETH_MIN_MTU; + dev->max_mtu = MAX_ETH_DATA_SIZE; + /* tp zeroed and aligned in alloc_etherdev */ tp = netdev_priv(dev); diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c index e55638c..b698ea5 100644 --- a/drivers/net/ethernet/realtek/r8169.c +++ b/drivers/net/ethernet/realtek/r8169.c @@ -6673,10 +6673,6 @@ static int rtl8169_change_mtu(struct net_device *dev, int new_mtu) { struct rtl8169_private *tp = netdev_priv(dev); - if (new_mtu < ETH_ZLEN || - new_mtu > rtl_chip_infos[tp->mac_version].jumbo_max) - return -EINVAL; - if (new_mtu > ETH_DATA_LEN) rtl_hw_jumbo_enable(tp); else @@ -8430,6 +8426,10 @@ static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) dev->hw_features |= NETIF_F_RXALL; dev->hw_features |= NETIF_F_RXFCS; + /* MTU range: 60 - hw-specific max */ + dev->min_mtu = ETH_ZLEN; + dev->max_mtu = rtl_chip_infos[chipset].jumbo_max; + tp->hw_start = cfg->hw_start; tp->event_slow = cfg->event_slow; -- 2.10.0