[PATCH net-next 8/9] net: mvpp2: use tso_features_check()

[Eric Dumazet <edumazet@google.com>]

We must fallback to GSO if a TSO packet has too big headers,
or risk corruptions.

Fixes: 186cd4d4e414 ("net: mvpp2: software tso support")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Antoine Tenart <atenart@kernel.org>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
---
 drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index f442b874bb5933b298773bee7e6140e753bce013..6a065402f62605a9333c9050cdbb793ce547e74a 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -4318,6 +4318,7 @@ static int mvpp2_tx_tso(struct sk_buff *skb, struct net_device *dev,
 		return 0;
 
 	hdr_sz = tso_start(skb, &tso);
+	DEBUG_NET_WARN_ON_ONCE(hdr_sz > TSO_HEADER_SIZE);
 
 	len = skb->len - hdr_sz;
 	while (len > 0) {
@@ -5795,6 +5796,7 @@ static int mvpp2_ethtool_set_eee(struct net_device *dev,
 static const struct net_device_ops mvpp2_netdev_ops = {
 	.ndo_open		= mvpp2_open,
 	.ndo_stop		= mvpp2_stop,
+	.ndo_features_check	= tso_features_check,
 	.ndo_start_xmit		= mvpp2_tx,
 	.ndo_set_rx_mode	= mvpp2_set_rx_mode,
 	.ndo_set_mac_address	= mvpp2_set_mac_address,
-- 
2.53.0.1213.gd9a14994de-goog