[TIPC]: Fixed link switchover bugs

Incorporates several related fixes:
- switchover now occurs when switching from an active link to a standby link
- failure of a standby link no longer initiates switchover
- links now display correct # of received packtes following reactivation

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 2 deletions

diff --git a/net/tipc/node.c b/net/tipc/node.c
index 5f097547d3e3..ce9678efa98a 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -125,6 +125,8 @@ void tipc_node_link_up(struct node *n_ptr, struct link *l_ptr)
 {
         struct link **active = &n_ptr->active_links[0];
 
+        n_ptr->working_links++;
+
         info("Established link <%s> on network plane %c\n",
              l_ptr->name, l_ptr->b_ptr->net_plane);
         
@@ -185,6 +187,8 @@ void tipc_node_link_down(struct node *n_ptr, struct link *l_ptr)
 {
         struct link **active;
 
+        n_ptr->working_links--;
+
         if (!tipc_link_is_active(l_ptr)) {
                 info("Lost standby link <%s> on network plane %c\n",
                      l_ptr->name, l_ptr->b_ptr->net_plane);
@@ -214,8 +218,7 @@ int tipc_node_has_active_links(struct node *n_ptr)
 
 int tipc_node_has_redundant_links(struct node *n_ptr)
 {
-        return (tipc_node_has_active_links(n_ptr) &&
-                (n_ptr->active_links[0] != n_ptr->active_links[1]));
+        return (n_ptr->working_links > 1);
 }
 
 static int tipc_node_has_active_routes(struct node *n_ptr)