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Commit e39aece7 authored by Vladislav Zolotarov's avatar Vladislav Zolotarov Committed by David S. Miller
Browse files

bnx2x: fix UDP csum offload 



Fixed packets parameters for FW in UDP checksum offload flow.

Do not dereference TCP headers on non TCP frames.
Reported-by: default avatarEric Dumazet <eric.dumazet@gmail.com>

Signed-off-by: default avatarDmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: default avatarEilon Greenstein <eilong@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 13f172ff

drivers/net/bnx2x/bnx2x_cmn.c

+24 −10
Original line number Diff line number Diff line
@@ -2019,15 +2019,23 @@ static inline void bnx2x_set_pbd_gso(struct sk_buff *skb, 
static inline  u8 bnx2x_set_pbd_csum_e2(struct bnx2x *bp, struct sk_buff *skb,

	u32 *parsing_data, u32 xmit_type)

{

	*parsing_data |=

			((((u8 *)skb_transport_header(skb) - skb->data) >> 1) <<

			ETH_TX_PARSE_BD_E2_TCP_HDR_START_OFFSET_W_SHIFT) &

			ETH_TX_PARSE_BD_E2_TCP_HDR_START_OFFSET_W;



	if (xmit_type & XMIT_CSUM_TCP) {

		*parsing_data |= ((tcp_hdrlen(skb) / 4) <<

			ETH_TX_PARSE_BD_E2_TCP_HDR_LENGTH_DW_SHIFT) &

			ETH_TX_PARSE_BD_E2_TCP_HDR_LENGTH_DW;



	*parsing_data |= ((((u8 *)tcp_hdr(skb) - skb->data) / 2) <<

		ETH_TX_PARSE_BD_E2_TCP_HDR_START_OFFSET_W_SHIFT) &

		ETH_TX_PARSE_BD_E2_TCP_HDR_START_OFFSET_W;



		return skb_transport_header(skb) + tcp_hdrlen(skb) - skb->data;

	} else

		/* We support checksum offload for TCP and UDP only.

		 * No need to pass the UDP header length - it's a constant.

		 */

		return skb_transport_header(skb) +

				sizeof(struct udphdr) - skb->data;

}



/**
@@ -2043,7 +2051,7 @@ static inline u8 bnx2x_set_pbd_csum(struct bnx2x *bp, struct sk_buff *skb, 
	struct eth_tx_parse_bd_e1x *pbd,

	u32 xmit_type)

{

	u8 hlen = (skb_network_header(skb) - skb->data) / 2;

	u8 hlen = (skb_network_header(skb) - skb->data) >> 1;



	/* for now NS flag is not used in Linux */

	pbd->global_data =
@@ -2051,9 +2059,15 @@ static inline u8 bnx2x_set_pbd_csum(struct bnx2x *bp, struct sk_buff *skb, 
			 ETH_TX_PARSE_BD_E1X_LLC_SNAP_EN_SHIFT));



	pbd->ip_hlen_w = (skb_transport_header(skb) -

			skb_network_header(skb)) / 2;

			skb_network_header(skb)) >> 1;



	hlen += pbd->ip_hlen_w + tcp_hdrlen(skb) / 2;

	hlen += pbd->ip_hlen_w;



	/* We support checksum offload for TCP and UDP only */

	if (xmit_type & XMIT_CSUM_TCP)

		hlen += tcp_hdrlen(skb) / 2;

	else

		hlen += sizeof(struct udphdr) / 2;



	pbd->total_hlen_w = cpu_to_le16(hlen);

	hlen = hlen*2;