net: core: netpoll: Enable netconsole IPv6 link local address

There is no reason to discard using source link local address when
remote netconsole IPv6 address is set to be link local one.

The patch allows administrators to use IPv6 netconsole without
explicitly configuring source address:

    netconsole=@/,@fe80::5054:ff:fe2f:6012/

Signed-off-by: Matwey V. Kornilov <matwey@sai.msu.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 5da9552..2b9fdbc 100644 (file)
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -717,7 +717,8 @@ int netpoll_setup(struct netpoll *np)
 
                                read_lock_bh(&idev->lock);
                                list_for_each_entry(ifp, &idev->addr_list, if_list) {
-                                       if (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)
+                                       if (!!(ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL) !=
+                                           !!(ipv6_addr_type(&np->remote_ip.in6) & IPV6_ADDR_LINKLOCAL))
                                                continue;
                                        np->local_ip.in6 = ifp->addr;
                                        err = 0;