From: Daniel Hellstrom Date: Fri, 9 Sep 2011 05:17:54 +0000 (+0000) Subject: GRETH: avoid overwrite IP-stack's IP-frags checksum X-Git-Tag: firefly_0821_release~3680^2~4429^2~8 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d706f00f65146822c0097b796b3557ea8980c305;p=firefly-linux-kernel-4.4.55.git 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: Daniel Hellstrom Signed-off-by: David S. Miller --- diff --git a/drivers/net/greth.c b/drivers/net/greth.c index 58ec74a73150..52a39000c42c 100644 --- a/drivers/net/greth.c +++ b/drivers/net/greth.c @@ -491,7 +491,8 @@ greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev) if (nr_frags != 0) status = GRETH_TXBD_MORE; - status |= GRETH_TXBD_CSALL; + if (skb->ip_summed == CHECKSUM_PARTIAL) + status |= GRETH_TXBD_CSALL; status |= skb_headlen(skb) & GRETH_BD_LEN; if (greth->tx_next == GRETH_TXBD_NUM_MASK) status |= GRETH_BD_WR; @@ -514,7 +515,9 @@ greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev) greth->tx_skbuff[curr_tx] = NULL; 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; /* Wrap around descriptor ring */