1 files changed, 24 insertions, 14 deletions

diff --git a/net/tipc/node.c b/net/tipc/node.c
index 5b44c3041be4..f7069299943f 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -1,7 +1,7 @@
 /*
  * net/tipc/node.c: TIPC node management routines
  *
- * Copyright (c) 2000-2006, 2012 Ericsson AB
+ * Copyright (c) 2000-2006, 2012-2014, Ericsson AB
  * Copyright (c) 2005-2006, 2010-2014, Wind River Systems
  * All rights reserved.
  *
@@ -155,21 +155,25 @@ void tipc_node_link_up(struct tipc_node *n_ptr, struct tipc_link *l_ptr)
         if (!active[0]) {
                 active[0] = active[1] = l_ptr;
                 node_established_contact(n_ptr);
-                return;
+                goto exit;
         }
         if (l_ptr->priority < active[0]->priority) {
                 pr_info("New link <%s> becomes standby\n", l_ptr->name);
-                return;
+                goto exit;
         }
         tipc_link_dup_queue_xmit(active[0], l_ptr);
         if (l_ptr->priority == active[0]->priority) {
                 active[0] = l_ptr;
-                return;
+                goto exit;
         }
         pr_info("Old link <%s> becomes standby\n", active[0]->name);
         if (active[1] != active[0])
                 pr_info("Old link <%s> becomes standby\n", active[1]->name);
         active[0] = active[1] = l_ptr;
+exit:
+        /* Leave room for changeover header when returning 'mtu' to users: */
+        n_ptr->act_mtus[0] = active[0]->max_pkt - INT_H_SIZE;
+        n_ptr->act_mtus[1] = active[1]->max_pkt - INT_H_SIZE;
 }
 
 /**
@@ -229,6 +233,19 @@ void tipc_node_link_down(struct tipc_node *n_ptr, struct tipc_link *l_ptr)
                 tipc_link_failover_send_queue(l_ptr);
         else
                 node_lost_contact(n_ptr);
+
+        /* Leave room for changeover header when returning 'mtu' to users: */
+        if (active[0]) {
+                n_ptr->act_mtus[0] = active[0]->max_pkt - INT_H_SIZE;
+                n_ptr->act_mtus[1] = active[1]->max_pkt - INT_H_SIZE;
+                return;
+        }
+
+        /* Loopback link went down? No fragmentation needed from now on. */
+        if (n_ptr->addr == tipc_own_addr) {
+                n_ptr->act_mtus[0] = MAX_MSG_SIZE;
+                n_ptr->act_mtus[1] = MAX_MSG_SIZE;
+        }
 }
 
 int tipc_node_active_links(struct tipc_node *n_ptr)
@@ -457,8 +474,6 @@ int tipc_node_get_linkname(u32 bearer_id, u32 addr, char *linkname, size_t len)
 void tipc_node_unlock(struct tipc_node *node)
 {
         LIST_HEAD(nsub_list);
-        struct tipc_link *link;
-        int pkt_sz = 0;
         u32 addr = 0;
 
         if (likely(!node->action_flags)) {
@@ -471,18 +486,13 @@ void tipc_node_unlock(struct tipc_node *node)
                 node->action_flags &= ~TIPC_NOTIFY_NODE_DOWN;
         }
         if (node->action_flags & TIPC_NOTIFY_NODE_UP) {
-                link = node->active_links[0];
                 node->action_flags &= ~TIPC_NOTIFY_NODE_UP;
-                if (link) {
-                        pkt_sz = ((link->max_pkt - INT_H_SIZE) / ITEM_SIZE) *
-                                  ITEM_SIZE;
-                        addr = node->addr;
-                }
+                addr = node->addr;
         }
         spin_unlock_bh(&node->lock);
 
         if (!list_empty(&nsub_list))
                 tipc_nodesub_notify(&nsub_list);
-        if (pkt_sz)
-                tipc_named_node_up(pkt_sz, addr);
+        if (addr)
+                tipc_named_node_up(addr);
 }