ipv6: do not erase dst address with flow label destination

This patch is following b579035ff766c9412e2b92abf5cab794bff102b6
	"ipv6: remove old conditions on flow label sharing"

Since there is no reason to restrict a label to a
destination, we should not erase the destination value of a
socket with the value contained in the flow label storage.

This patch allows to really have the same flow label to more
than one destination.

Signed-off-by: Florent Fourcot <florent.fourcot@enst-bretagne.fr>
Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/dccp/ipv6.c

@@ -851,7 +851,6 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
 			flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
 			if (flowlabel == NULL)
 				return -EINVAL;
-			usin->sin6_addr = flowlabel->dst;
 			fl6_sock_release(flowlabel);
 		}
 	}

net/ipv6/datagram.c

@@ -73,7 +73,6 @@ int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 			flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
 			if (flowlabel == NULL)
 				return -EINVAL;
-			usin->sin6_addr = flowlabel->dst;
 		}
 	}
 

net/ipv6/raw.c

@@ -792,7 +792,6 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
 				flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
 				if (flowlabel == NULL)
 					return -EINVAL;
-				daddr = &flowlabel->dst;
 			}
 		}
 

net/ipv6/tcp_ipv6.c

@@ -156,7 +156,6 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
 			flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
 			if (flowlabel == NULL)
 				return -EINVAL;
-			usin->sin6_addr = flowlabel->dst;
 			fl6_sock_release(flowlabel);
 		}
 	}

net/ipv6/udp.c

@@ -1140,7 +1140,6 @@ do_udp_sendmsg:
 				flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
 				if (flowlabel == NULL)
 					return -EINVAL;
-				daddr = &flowlabel->dst;
 			}
 		}
 

net/l2tp/l2tp_ip6.c

@@ -528,7 +528,6 @@ static int l2tp_ip6_sendmsg(struct kiocb *iocb, struct sock *sk,
 				flowlabel = fl6_sock_lookup(sk, fl6.flowlabel);
 				if (flowlabel == NULL)
 					return -EINVAL;
-				daddr = &flowlabel->dst;
 			}
 		}