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Commit d706f00f authored by Daniel Hellstrom's avatar Daniel Hellstrom Committed by David S. Miller
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GRETH: avoid overwrite IP-stack's IP-frags checksum 



The GRETH GBIT core does not do checksum offloading for IP
segmentation. This patch adds a check in the xmit function to
determine if the stack has calculated the checksum for us.

Signed-off-by: default avatarDaniel Hellstrom <daniel@gaisler.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6af29a96

drivers/net/greth.c

+5 −2
Original line number Original line Diff line number Diff line
@@ -491,6 +491,7 @@ greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev) 
	if (nr_frags != 0)

	if (nr_frags != 0)

		status = GRETH_TXBD_MORE;

		status = GRETH_TXBD_MORE;





	if (skb->ip_summed == CHECKSUM_PARTIAL)

		status |= GRETH_TXBD_CSALL;

		status |= GRETH_TXBD_CSALL;

	status |= skb_headlen(skb) & GRETH_BD_LEN;

	status |= skb_headlen(skb) & GRETH_BD_LEN;

	if (greth->tx_next == GRETH_TXBD_NUM_MASK)

	if (greth->tx_next == GRETH_TXBD_NUM_MASK)
@@ -514,7 +515,9 @@ greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev) 
		greth->tx_skbuff[curr_tx] = NULL;

		greth->tx_skbuff[curr_tx] = NULL;

		bdp = greth->tx_bd_base + curr_tx;

		bdp = greth->tx_bd_base + curr_tx;





		status = GRETH_TXBD_CSALL | GRETH_BD_EN;

		status = GRETH_BD_EN;

		if (skb->ip_summed == CHECKSUM_PARTIAL)

			status |= GRETH_TXBD_CSALL;

		status |= frag->size & GRETH_BD_LEN;

		status |= frag->size & GRETH_BD_LEN;





		/* Wrap around descriptor ring */

		/* Wrap around descriptor ring */