Do checksum offload only if the client of the driver wants checksum to be
offloaded. Also Windows hosts support ip header checksum offload as well -
take advantage of that.
This patch fixes a bug that is exposed in gateway scenarios.
Signed-off-by: K. Y. Srinivasan <k...@microsoft.com>
Reviewed-by: Haiyang Zhang <haiya...@microsoft.com>
Cc: sta...@kernel.org
---
drivers/net/hyperv/netvsc_drv.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 939e3af..706b341 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -467,6 +467,9 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct
net_device *net)
if (skb_is_gso(skb))
goto do_lso;
+ if (skb->ip_summed != CHECKSUM_PARTIAL)
+ goto do_send;
+
rndis_msg_size += NDIS_CSUM_PPI_SIZE;
ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE,
TCPIP_CHKSUM_PKTINFO);
@@ -474,6 +477,9 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct
net_device *net)
csum_info = (struct ndis_tcp_ip_checksum_info *)((void *)ppi +
ppi->ppi_offset);
+ ip_hdr(skb)->check = 0;
+ csum_info->transmit.ip_header_checksum = 1;
+
if (net_trans_info & (INFO_IPV4 << 16))
csum_info->transmit.is_ipv4 = 1;
else
--
1.7.4.1
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