net: usb: lan78xx: Add .ndo_features_check
As reported by Eric Dumazet, there are still some outstanding cases where the driver does not handle TSO correctly when skb's are over a certain size. Most cases have been fixed, this patch should ensure that forwarded SKB's that are greater than MAX_SINGLE_PACKET_SIZE - TX_OVERHEAD are software segmented and handled correctly. Signed-off-by: James Hughes <james.hughes@raspberrypi.org> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -20,6 +20,7 @@
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#include <linux/mdio.h>
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#include <linux/phy.h>
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#include <net/ip6_checksum.h>
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#include <net/vxlan.h>
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#include <linux/interrupt.h>
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#include <linux/irqdomain.h>
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#include <linux/irq.h>
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@ -3668,6 +3669,19 @@ static void lan78xx_tx_timeout(struct net_device *net)
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tasklet_schedule(&dev->bh);
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}
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static netdev_features_t lan78xx_features_check(struct sk_buff *skb,
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struct net_device *netdev,
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netdev_features_t features)
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{
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if (skb->len + TX_OVERHEAD > MAX_SINGLE_PACKET_SIZE)
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features &= ~NETIF_F_GSO_MASK;
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features = vlan_features_check(skb, features);
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features = vxlan_features_check(skb, features);
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return features;
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}
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static const struct net_device_ops lan78xx_netdev_ops = {
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.ndo_open = lan78xx_open,
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.ndo_stop = lan78xx_stop,
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@ -3681,6 +3695,7 @@ static const struct net_device_ops lan78xx_netdev_ops = {
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.ndo_set_features = lan78xx_set_features,
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.ndo_vlan_rx_add_vid = lan78xx_vlan_rx_add_vid,
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.ndo_vlan_rx_kill_vid = lan78xx_vlan_rx_kill_vid,
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.ndo_features_check = lan78xx_features_check,
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};
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static void lan78xx_stat_monitor(struct timer_list *t)
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