tipc: clean up the process of link pushing packets

In original tipc_link_push_packet(), it pushes messages from protocol
message queue, retransmission queue and next_out queue. But as the two
first queues are removed, we can simplify its relevant code through
deleting tipc_link_push_queue().

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

3 files changed, 24 insertions, 42 deletions

diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index 556b26ad4b1e..27648841e7ff 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -307,7 +307,7 @@ void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked)
         /* Try resolving broadcast link congestion, if necessary */
 
         if (unlikely(bcl->next_out)) {
-                tipc_link_push_queue(bcl);
+                tipc_link_push_packets(bcl);
                 bclink_set_last_sent();
         }
         if (unlikely(released && !skb_queue_empty(&bcl->waiting_sks)))
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 4b7cbfd57714..470f05383d43 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -149,18 +149,6 @@ static void link_init_max_pkt(struct tipc_link *l_ptr)
         l_ptr->max_pkt_probes = 0;
 }
 
-static u32 link_next_sent(struct tipc_link *l_ptr)
-{
-        if (l_ptr->next_out)
-                return buf_seqno(l_ptr->next_out);
-        return mod(l_ptr->next_out_no);
-}
-
-static u32 link_last_sent(struct tipc_link *l_ptr)
-{
-        return mod(link_next_sent(l_ptr) - 1);
-}
-
 /*
  *  Simple non-static link routines (i.e. referenced outside this file)
  */
@@ -222,7 +210,7 @@ static void link_timeout(struct tipc_link *l_ptr)
         link_state_event(l_ptr, TIMEOUT_EVT);
 
         if (l_ptr->next_out)
-                tipc_link_push_queue(l_ptr);
+                tipc_link_push_packets(l_ptr);
 
         tipc_node_unlock(l_ptr->owner);
 }
@@ -864,43 +852,37 @@ static void tipc_link_sync_rcv(struct tipc_node *n, struct sk_buff *buf)
 }
 
 /*
- * tipc_link_push_packet: Push one unsent packet to the media
+ * tipc_link_push_packets - push unsent packets to bearer
+ *
+ * Push out the unsent messages of a link where congestion
+ * has abated. Node is locked.
+ *
+ * Called with node locked
  */
-static u32 tipc_link_push_packet(struct tipc_link *l_ptr)
+void tipc_link_push_packets(struct tipc_link *l_ptr)
 {
-        struct sk_buff *buf = l_ptr->next_out;
+        struct sk_buff *skb;
+        struct tipc_msg *msg;
+        u32 next, first;
 
-        /* Send one deferred data message, if send window not full: */
-        if (buf) {
-                struct tipc_msg *msg = buf_msg(buf);
-                u32 next = msg_seqno(msg);
-                u32 first = buf_seqno(l_ptr->first_out);
+        while (l_ptr->next_out) {
+                skb = l_ptr->next_out;
+                msg = buf_msg(skb);
+                next = msg_seqno(msg);
+                first = buf_seqno(l_ptr->first_out);
 
                 if (mod(next - first) < l_ptr->queue_limit[0]) {
                         msg_set_ack(msg, mod(l_ptr->next_in_no - 1));
                         msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in);
-                        tipc_bearer_send(l_ptr->bearer_id, buf,
-                                         &l_ptr->media_addr);
                         if (msg_user(msg) == MSG_BUNDLER)
                                 msg_set_type(msg, BUNDLE_CLOSED);
-                        l_ptr->next_out = buf->next;
-                        return 0;
+                        tipc_bearer_send(l_ptr->bearer_id, skb,
+                                         &l_ptr->media_addr);
+                        l_ptr->next_out = skb->next;
+                } else {
+                        break;
                 }
         }
-        return 1;
-}
-
-/*
- * push_queue(): push out the unsent messages of a link where
- *               congestion has abated. Node is locked
- */
-void tipc_link_push_queue(struct tipc_link *l_ptr)
-{
-        u32 res;
-
-        do {
-                res = tipc_link_push_packet(l_ptr);
-        } while (!res);
 }
 
 void tipc_link_reset_all(struct tipc_node *node)
@@ -1164,7 +1146,7 @@ void tipc_rcv(struct sk_buff *head, struct tipc_bearer *b_ptr)
 
                 /* Try sending any messages link endpoint has pending */
                 if (unlikely(l_ptr->next_out))
-                        tipc_link_push_queue(l_ptr);
+                        tipc_link_push_packets(l_ptr);
 
                 if (released && !skb_queue_empty(&l_ptr->waiting_sks)) {
                         link_prepare_wakeup(l_ptr);
diff --git a/net/tipc/link.h b/net/tipc/link.h
index cc816aacb16e..1681076cb339 100644
--- a/net/tipc/link.h
+++ b/net/tipc/link.h
@@ -227,7 +227,7 @@ u32 tipc_link_get_max_pkt(u32 dest, u32 selector);
 void tipc_link_bundle_rcv(struct sk_buff *buf);
 void tipc_link_proto_xmit(struct tipc_link *l_ptr, u32 msg_typ, int prob,
                           u32 gap, u32 tolerance, u32 priority, u32 acked_mtu);
-void tipc_link_push_queue(struct tipc_link *l_ptr);
+void tipc_link_push_packets(struct tipc_link *l_ptr);
 u32 tipc_link_defer_pkt(struct sk_buff **head, struct sk_buff **tail,
                         struct sk_buff *buf);
 void tipc_link_set_queue_limits(struct tipc_link *l_ptr, u32 window);