[NEIGH]: Make neigh_add_timer symmetrical to neigh_del_timer.

The neigh_del_timer() looks sane - it removes the timer and
(conditionally) puts the neighbor. I expected, that the
neigh_add_timer() is symmetrical to the del one - i.e. it
holds the neighbor and arms the timer - but it turned out
that it was not so.

I think, that making them look symmetrical makes the code
more readable.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 14 deletions

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 4b6dd1e66f10..9a283fcde9a6 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -165,6 +165,16 @@ static int neigh_forced_gc(struct neigh_table *tbl)
         return shrunk;
 }
 
+static void neigh_add_timer(struct neighbour *n, unsigned long when)
+{
+        neigh_hold(n);
+        if (unlikely(mod_timer(&n->timer, when))) {
+                printk("NEIGH: BUG, double timer add, state is %x\n",
+                       n->nud_state);
+                dump_stack();
+        }
+}
+
 static int neigh_del_timer(struct neighbour *n)
 {
         if ((n->nud_state & NUD_IN_TIMER) &&
@@ -716,15 +726,6 @@ static __inline__ int neigh_max_probes(struct neighbour *n)
                 p->ucast_probes + p->app_probes + p->mcast_probes);
 }
 
-static inline void neigh_add_timer(struct neighbour *n, unsigned long when)
-{
-        if (unlikely(mod_timer(&n->timer, when))) {
-                printk("NEIGH: BUG, double timer add, state is %x\n",
-                       n->nud_state);
-                dump_stack();
-        }
-}
-
 /* Called when a timer expires for a neighbour entry. */
 
 static void neigh_timer_handler(unsigned long arg)
@@ -856,7 +857,6 @@ int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb)
                         atomic_set(&neigh->probes, neigh->parms->ucast_probes);
                         neigh->nud_state     = NUD_INCOMPLETE;
                         neigh->updated = jiffies;
-                        neigh_hold(neigh);
                         neigh_add_timer(neigh, now + 1);
                 } else {
                         neigh->nud_state = NUD_FAILED;
@@ -869,7 +869,6 @@ int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb)
                 }
         } else if (neigh->nud_state & NUD_STALE) {
                 NEIGH_PRINTK2("neigh %p is delayed.\n", neigh);
-                neigh_hold(neigh);
                 neigh->nud_state = NUD_DELAY;
                 neigh->updated = jiffies;
                 neigh_add_timer(neigh,
@@ -1013,13 +1012,11 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new,
 
         if (new != old) {
                 neigh_del_timer(neigh);
-                if (new & NUD_IN_TIMER) {
-                        neigh_hold(neigh);
+                if (new & NUD_IN_TIMER)
                         neigh_add_timer(neigh, (jiffies +
                                                 ((new & NUD_REACHABLE) ?
                                                  neigh->parms->reachable_time :
                                                  0)));
-                }
                 neigh->nud_state = new;
         }