From af31923bd8ce4de3dc002afffe0b236ab010278f Mon Sep 17 00:00:00 2001 From: Raju Rangoju Date: Wed, 31 May 2017 12:06:58 +0530 Subject: [PATCH] RDMA/iw_cxgb4: fix the calculation of ipv6 header size Take care of ipv6 checks while computing header length for deducing mtu size of ipv6 servers. Due to the incorrect header length computation for ipv6 servers, wrong mss is reported to the peer (client). Signed-off-by: Raju Rangoju Signed-off-by: Ganesh Goudar Acked-by: Steve Wise Signed-off-by: Doug Ledford --- drivers/infiniband/hw/cxgb4/cm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c index 06b110213e929..0910faf3587b5 100644 --- a/drivers/infiniband/hw/cxgb4/cm.c +++ b/drivers/infiniband/hw/cxgb4/cm.c @@ -2521,7 +2521,8 @@ static int pass_accept_req(struct c4iw_dev *dev, struct sk_buff *skb) goto reject; } - hdrs = sizeof(struct iphdr) + sizeof(struct tcphdr) + + hdrs = ((iptype == 4) ? sizeof(struct iphdr) : sizeof(struct ipv6hdr)) + + sizeof(struct tcphdr) + ((enable_tcp_timestamps && req->tcpopt.tstamp) ? 12 : 0); if (peer_mss && child_ep->mtu > (peer_mss + hdrs)) child_ep->mtu = peer_mss + hdrs; -- 2.39.5