net: remove NETIF_F_NO_CSUM feature bit

[karo-tx-linux.git] / net / core / dev.c

diff --git a/net/core/dev.c b/net/core/dev.c
index f1cca59c46380f7d3f0f7a98d69aed8b0c1a241c..26c49d55e79d83d14d99b12288bf1c32aaad61b2 100644 (file)
--- 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);