Commit 22041fb0 authored by KY Srinivasan's avatar KY Srinivasan Committed by David S. Miller

hyperv: Properly handle checksum offload

Do checksum offload only if the client of the driver wants checksum to be
offloaded.

In V1 version of this patch, I  addressed comments from
Stephen Hemminger <stephen@networkplumber.org> and
Eric Dumazet <eric.dumazet@gmail.com>.

In this version of the patch I have addressed comments from
David Miller.

This patch fixes a bug that is exposed in gateway scenarios.
Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6ce29b0e
...@@ -382,6 +382,10 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) ...@@ -382,6 +382,10 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
if (skb_is_gso(skb)) if (skb_is_gso(skb))
goto do_lso; goto do_lso;
if ((skb->ip_summed == CHECKSUM_NONE) ||
(skb->ip_summed == CHECKSUM_UNNECESSARY))
goto do_send;
rndis_msg_size += NDIS_CSUM_PPI_SIZE; rndis_msg_size += NDIS_CSUM_PPI_SIZE;
ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE, ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE,
TCPIP_CHKSUM_PKTINFO); TCPIP_CHKSUM_PKTINFO);
......
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