diff options
Diffstat (limited to 'net/core/dev.c')
| -rw-r--r-- | net/core/dev.c | 46 |
1 files changed, 40 insertions, 6 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 8686f6ffe7f0..4f6943928fe8 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -5302,6 +5302,37 @@ u32 netdev_fix_features(struct net_device *dev, u32 features) } EXPORT_SYMBOL(netdev_fix_features); +void netdev_update_features(struct net_device *dev) +{ + u32 features; + int err = 0; + + features = netdev_get_wanted_features(dev); + + if (dev->netdev_ops->ndo_fix_features) + features = dev->netdev_ops->ndo_fix_features(dev, features); + + /* driver might be less strict about feature dependencies */ + features = netdev_fix_features(dev, features); + + if (dev->features == features) + return; + + netdev_info(dev, "Features changed: 0x%08x -> 0x%08x\n", + dev->features, features); + + if (dev->netdev_ops->ndo_set_features) + err = dev->netdev_ops->ndo_set_features(dev, features); + + if (!err) + dev->features = features; + else if (err < 0) + netdev_err(dev, + "set_features() failed (%d); wanted 0x%08x, left 0x%08x\n", + err, features, dev->features); +} +EXPORT_SYMBOL(netdev_update_features); + /** * netif_stacked_transfer_operstate - transfer operstate * @rootdev: the root or lower level device to transfer state from @@ -5436,15 +5467,18 @@ int register_netdevice(struct net_device *dev) if (dev->iflink == -1) dev->iflink = dev->ifindex; - /* Enable software offloads by default - will be stripped in - * netdev_fix_features() if not supported. */ - dev->features |= NETIF_F_SOFT_FEATURES; + /* Transfer changeable features to wanted_features and enable + * software offloads (GSO and GRO). + */ + dev->hw_features |= NETIF_F_SOFT_FEATURES; + dev->wanted_features = (dev->features & dev->hw_features) + | NETIF_F_SOFT_FEATURES; /* Avoid warning from netdev_fix_features() for GSO without SG */ - if (!(dev->features & NETIF_F_SG)) - dev->features &= ~NETIF_F_GSO; + if (!(dev->wanted_features & NETIF_F_SG)) + dev->wanted_features &= ~NETIF_F_GSO; - dev->features = netdev_fix_features(dev, dev->features); + netdev_update_features(dev); /* Enable GRO and NETIF_F_HIGHDMA for vlans by default, * vlan_dev_init() will do the dev->features check, so these features |