diff options
| author | James Hughes <james.hughes@raspberrypi.org> | 2020-01-20 12:12:40 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-01-21 10:46:51 +0100 |
| commit | ce896476c65d72b4b99fa09c2f33436b4198f034 (patch) | |
| tree | 099ff5adc0120cccd947b6d087076ecb8cf24bda /drivers/net/usb/lan78xx.c | |
| parent | tcp_bbr: improve arithmetic division in bbr_update_bw() (diff) | |
| download | linux-ce896476c65d72b4b99fa09c2f33436b4198f034.tar.xz linux-ce896476c65d72b4b99fa09c2f33436b4198f034.zip | |
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>
Diffstat (limited to 'drivers/net/usb/lan78xx.c')
| -rw-r--r-- | drivers/net/usb/lan78xx.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c index 75bdfae5f3e2..c2a58f05b9a1 100644 --- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -20,6 +20,7 @@ #include <linux/mdio.h> #include <linux/phy.h> #include <net/ip6_checksum.h> +#include <net/vxlan.h> #include <linux/interrupt.h> #include <linux/irqdomain.h> #include <linux/irq.h> @@ -3668,6 +3669,19 @@ static void lan78xx_tx_timeout(struct net_device *net) tasklet_schedule(&dev->bh); } +static netdev_features_t lan78xx_features_check(struct sk_buff *skb, + struct net_device *netdev, + netdev_features_t features) +{ + if (skb->len + TX_OVERHEAD > MAX_SINGLE_PACKET_SIZE) + features &= ~NETIF_F_GSO_MASK; + + features = vlan_features_check(skb, features); + features = vxlan_features_check(skb, features); + + return features; +} + static const struct net_device_ops lan78xx_netdev_ops = { .ndo_open = lan78xx_open, .ndo_stop = lan78xx_stop, @@ -3681,6 +3695,7 @@ static const struct net_device_ops lan78xx_netdev_ops = { .ndo_set_features = lan78xx_set_features, .ndo_vlan_rx_add_vid = lan78xx_vlan_rx_add_vid, .ndo_vlan_rx_kill_vid = lan78xx_vlan_rx_kill_vid, + .ndo_features_check = lan78xx_features_check, }; static void lan78xx_stat_monitor(struct timer_list *t) |