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 <kys@xxxxxxxxxxxxx> Reviewed-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx> Cc: stable@xxxxxxxxxx --- 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 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
