tipc: remove implicit message delivery in node_unlock()

After the most recent changes, all access calls to a link which
may entail addition of messages to the link's input queue are
postpended by an explicit call to tipc_sk_rcv(), using a reference
to the correct queue.

This means that the potentially hazardous implicit delivery, using
tipc_node_unlock() in combination with a binary flag and a cached
queue pointer, now has become redundant.

This commit removes this implicit delivery mechanism both for regular
data messages and for binding table update messages.

Tested-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 22 deletions

diff --git a/net/tipc/msg.h b/net/tipc/msg.h
index 53d98ef78650..a82c5848d4bc 100644
--- a/net/tipc/msg.h
+++ b/net/tipc/msg.h
@@ -862,28 +862,6 @@ static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list,
         return skb;
 }
 
-/* tipc_skb_queue_tail(): add buffer to tail of list;
- * @list: list to be appended to
- * @skb: buffer to append. Always appended
- * @dport: the destination port of the buffer
- * returns true if dport differs from previous destination
- */
-static inline bool tipc_skb_queue_tail(struct sk_buff_head *list,
-                                       struct sk_buff *skb, u32 dport)
-{
-        struct sk_buff *_skb = NULL;
-        bool rv = false;
-
-        spin_lock_bh(&list->lock);
-        _skb = skb_peek_tail(list);
-        if (!_skb || (msg_destport(buf_msg(_skb)) != dport) ||
-            (skb_queue_len(list) > 32))
-                rv = true;
-        __skb_queue_tail(list, skb);
-        spin_unlock_bh(&list->lock);
-        return rv;
-}
-
 /* tipc_skb_queue_sorted(); sort pkt into list according to sequence number
  * @list: list to be appended to
  * @skb: buffer to add