From 34324dc2bf27c1773045fea63cb11f7e2a6ad2b9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= Date: Tue, 15 Nov 2011 15:29:55 +0000 Subject: net: remove NETIF_F_NO_CSUM feature bit MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Only distinct use is checking if NETIF_F_NOCACHE_COPY should be enabled by default. The check heuristics is altered a bit here, so it hits other people than before. The default shouldn't be trusted for performance-critical cases anyway. For all other uses NETIF_F_NO_CSUM is equivalent to NETIF_F_HW_CSUM. Signed-off-by: Michał Mirosław Signed-off-by: David S. Miller --- net/core/dev.c | 21 ++++++--------------- 1 file changed, 6 insertions(+), 15 deletions(-) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index f1cca59c4638..26c49d55e79d 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -5362,12 +5362,6 @@ static netdev_features_t netdev_fix_features(struct net_device *dev, features &= ~(NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM); } - if ((features & NETIF_F_NO_CSUM) && - (features & (NETIF_F_HW_CSUM|NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) { - netdev_warn(dev, "mixed no checksumming and other settings.\n"); - features &= ~(NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM|NETIF_F_HW_CSUM); - } - /* Fix illegal SG+CSUM combinations. */ if ((features & NETIF_F_SG) && !(features & NETIF_F_ALL_CSUM)) { @@ -5624,11 +5618,12 @@ int register_netdevice(struct net_device *dev) dev->wanted_features = dev->features & dev->hw_features; /* Turn on no cache copy if HW is doing checksum */ - dev->hw_features |= NETIF_F_NOCACHE_COPY; - if ((dev->features & NETIF_F_ALL_CSUM) && - !(dev->features & NETIF_F_NO_CSUM)) { - dev->wanted_features |= NETIF_F_NOCACHE_COPY; - dev->features |= NETIF_F_NOCACHE_COPY; + if (!(dev->flags & IFF_LOOPBACK)) { + dev->hw_features |= NETIF_F_NOCACHE_COPY; + if (dev->features & NETIF_F_ALL_CSUM) { + dev->wanted_features |= NETIF_F_NOCACHE_COPY; + dev->features |= NETIF_F_NOCACHE_COPY; + } } /* Make NETIF_F_HIGHDMA inheritable to VLAN devices. @@ -6374,10 +6369,6 @@ netdev_features_t netdev_increment_features(netdev_features_t all, all |= one & (NETIF_F_ONE_FOR_ALL|NETIF_F_ALL_CSUM) & mask; all &= one | ~NETIF_F_ALL_FOR_ALL; - /* If device needs checksumming, downgrade to it. */ - if (all & (NETIF_F_ALL_CSUM & ~NETIF_F_NO_CSUM)) - all &= ~NETIF_F_NO_CSUM; - /* If one device supports hw checksumming, set for all. */ if (all & NETIF_F_GEN_CSUM) all &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM); -- cgit v1.2.2