cxgb4: Add PHY firmware support for T420-BT cards

[mirror_ubuntu-zesty-kernel.git] / net / ipv6 / ip6_output.c

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index c21777565c58cabd7649cc48b790ff21c88498b5..bc09cb97b8401011c112afe469fd231382387622 100644 (file)
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1300,8 +1300,10 @@ emsgsize:
 
        /* If this is the first and only packet and device
         * supports checksum offloading, let's use it.
+        * Use transhdrlen, same as IPv4, because partial
+        * sums only work when transhdrlen is set.
         */
-       if (!skb && sk->sk_protocol == IPPROTO_UDP &&
+       if (transhdrlen && sk->sk_protocol == IPPROTO_UDP &&
            length + fragheaderlen < mtu &&
            rt->dst.dev->features & NETIF_F_V6_CSUM &&
            !exthdrlen)