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Commit 3904dcc4 authored by Somnath Kotur's avatar Somnath Kotur Committed by David S. Miller
Browse files

be2net: Trim padded packets for Lancer 



For padded packets, Lancer computes incorrect checksum. The workaround is
to trim such packets. This workaround is mainly for IPv4 packets.

Signed-off-by: default avatarKalesh AP <kalesh.purayil@emulex.com>
Signed-off-by: default avatarSomnath Kotur <somnath.kotur@emulex.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 48265667

drivers/net/ethernet/emulex/benet/be_main.c

+3 −1
Original line number Original line Diff line number Diff line
@@ -860,10 +860,12 @@ static struct sk_buff *be_xmit_workarounds(struct be_adapter *adapter, 




	/* For padded packets, BE HW modifies tot_len field in IP header

	/* For padded packets, BE HW modifies tot_len field in IP header

	 * incorrecly when VLAN tag is inserted by HW.

	 * incorrecly when VLAN tag is inserted by HW.

	 * For padded packets, Lancer computes incorrect checksum.

	 */

	 */

	eth_hdr_len = ntohs(skb->protocol) == ETH_P_8021Q ?

	eth_hdr_len = ntohs(skb->protocol) == ETH_P_8021Q ?

						VLAN_ETH_HLEN : ETH_HLEN;

						VLAN_ETH_HLEN : ETH_HLEN;

	if (skb->len <= 60 && vlan_tx_tag_present(skb) &&

	if (skb->len <= 60 &&

	    (lancer_chip(adapter) || vlan_tx_tag_present(skb)) &&

	    is_ipv4_pkt(skb)) {

	    is_ipv4_pkt(skb)) {

		ip = (struct iphdr *)ip_hdr(skb);

		ip = (struct iphdr *)ip_hdr(skb);

		pskb_trim(skb, eth_hdr_len + ntohs(ip->tot_len));

		pskb_trim(skb, eth_hdr_len + ntohs(ip->tot_len));