1 files changed, 22 insertions, 31 deletions

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 3a692d529163..a54c45ce4a48 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1015,6 +1015,8 @@ static inline int ip6_ufo_append_data(struct sock *sk,
          * udp datagram
          */
         if ((skb = skb_peek_tail(&sk->sk_write_queue)) == NULL) {
+                struct frag_hdr fhdr;
+
                 skb = sock_alloc_send_skb(sk,
                         hh_len + fragheaderlen + transhdrlen + 20,
                         (flags & MSG_DONTWAIT), &err);
@@ -1036,12 +1038,6 @@ static inline int ip6_ufo_append_data(struct sock *sk,
                 skb->protocol = htons(ETH_P_IPV6);
                 skb->ip_summed = CHECKSUM_PARTIAL;
                 skb->csum = 0;
-        }
-
-        err = skb_append_datato_frags(sk,skb, getfrag, from,
-                                      (length - transhdrlen));
-        if (!err) {
-                struct frag_hdr fhdr;
 
                 /* Specify the length of each IPv6 datagram fragment.
                  * It has to be a multiple of 8.
@@ -1052,15 +1048,10 @@ static inline int ip6_ufo_append_data(struct sock *sk,
                 ipv6_select_ident(&fhdr, rt);
                 skb_shinfo(skb)->ip6_frag_id = fhdr.identification;
                 __skb_queue_tail(&sk->sk_write_queue, skb);
-
-                return 0;
         }
-        /* There is not enough support do UPD LSO,
-         * so follow normal path
-         */
-        kfree_skb(skb);
 
-        return err;
+        return skb_append_datato_frags(sk, skb, getfrag, from,
+                                       (length - transhdrlen));
 }
 
 static inline struct ipv6_opt_hdr *ip6_opt_dup(struct ipv6_opt_hdr *src,
@@ -1227,27 +1218,27 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
          * --yoshfuji
          */
 
-        cork->length += length;
-        if (length > mtu) {
-                int proto = sk->sk_protocol;
-                if (dontfrag && (proto == IPPROTO_UDP || proto == IPPROTO_RAW)){
-                        ipv6_local_rxpmtu(sk, fl6, mtu-exthdrlen);
-                        return -EMSGSIZE;
-                }
-
-                if (proto == IPPROTO_UDP &&
-                    (rt->dst.dev->features & NETIF_F_UFO)) {
+        if ((length > mtu) && dontfrag && (sk->sk_protocol == IPPROTO_UDP ||
+                                           sk->sk_protocol == IPPROTO_RAW)) {
+                ipv6_local_rxpmtu(sk, fl6, mtu-exthdrlen);
+                return -EMSGSIZE;
+        }
 
-                        err = ip6_ufo_append_data(sk, getfrag, from, length,
-                                                  hh_len, fragheaderlen,
-                                                  transhdrlen, mtu, flags, rt);
-                        if (err)
-                                goto error;
-                        return 0;
-                }
+        skb = skb_peek_tail(&sk->sk_write_queue);
+        cork->length += length;
+        if (((length > mtu) ||
+             (skb && skb_is_gso(skb))) &&
+            (sk->sk_protocol == IPPROTO_UDP) &&
+            (rt->dst.dev->features & NETIF_F_UFO)) {
+                err = ip6_ufo_append_data(sk, getfrag, from, length,
+                                          hh_len, fragheaderlen,
+                                          transhdrlen, mtu, flags, rt);
+                if (err)
+                        goto error;
+                return 0;
         }
 
-        if ((skb = skb_peek_tail(&sk->sk_write_queue)) == NULL)
+        if (!skb)
                 goto alloc_new_skb;
 
         while (length > 0) {