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Commit a5e31255 authored by hayeswang's avatar hayeswang Committed by David S. Miller
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r8152: support ndo_features_check 



Support ndo_features_check to avoid:
 - the transport offset is more than the hw limitation when using hw checksum.
 - the skb->len of a GSO packet is more than the limitation.

Signed-off-by: default avatarHayes Wang <hayeswang@realtek.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7ce67a38

drivers/net/usb/r8152.c

+17 −0
Original line number Diff line number Diff line
@@ -1897,6 +1897,22 @@ static void _rtl8152_set_rx_mode(struct net_device *netdev) 
	netif_wake_queue(netdev);

}



static netdev_features_t

rtl8152_features_check(struct sk_buff *skb, struct net_device *dev,

		       netdev_features_t features)

{

	u32 mss = skb_shinfo(skb)->gso_size;

	int max_offset = mss ? GTTCPHO_MAX : TCPHO_MAX;

	int offset = skb_transport_offset(skb);



	if ((mss || skb->ip_summed == CHECKSUM_PARTIAL) && offset > max_offset)

		features &= ~(NETIF_F_ALL_CSUM | NETIF_F_GSO_MASK);

	else if ((skb->len + sizeof(struct tx_desc)) > agg_buf_sz)

		features &= ~NETIF_F_GSO_MASK;



	return features;

}



static netdev_tx_t rtl8152_start_xmit(struct sk_buff *skb,

				      struct net_device *netdev)

{
@@ -3706,6 +3722,7 @@ static const struct net_device_ops rtl8152_netdev_ops = { 
	.ndo_set_mac_address	= rtl8152_set_mac_address,

	.ndo_change_mtu		= rtl8152_change_mtu,

	.ndo_validate_addr	= eth_validate_addr,

	.ndo_features_check	= rtl8152_features_check,

};



static void r8152b_get_version(struct r8152 *tp)