tipc: save sock structure pointer instead of void pointer to tipc_port

Directly save sock structure pointer instead of void pointer to avoid
unnecessary cast conversions.

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

net/tipc/port.c

@@ -206,7 +206,7 @@ exit:
  *
  * Returns pointer to (locked) TIPC port, or NULL if unable to create it
  */
-struct tipc_port *tipc_createport(void *usr_handle,
+struct tipc_port *tipc_createport(struct sock *sk,
 			u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
 			void (*wakeup)(struct tipc_port *),
 			const u32 importance)
@@ -227,7 +227,7 @@ struct tipc_port *tipc_createport(void *usr_handle,
 		return NULL;
 	}
 
-	p_ptr->usr_handle = usr_handle;
+	p_ptr->sk = sk;
 	p_ptr->max_pkt = MAX_PKT_DEFAULT;
 	p_ptr->ref = ref;
 	INIT_LIST_HEAD(&p_ptr->wait_list);

net/tipc/port.h

@@ -48,7 +48,7 @@
 
 /**
  * struct tipc_port - TIPC port structure
- * @usr_handle: pointer to additional user-defined information about port
+ * @sk: pointer to socket handle
  * @lock: pointer to spinlock for controlling access to port
  * @connected: non-zero if port is currently connected to a peer port
  * @conn_type: TIPC type used when connection was established
@@ -74,7 +74,7 @@
  * @subscription: "node down" subscription used to terminate failed connections
  */
 struct tipc_port {
-	void *usr_handle;
+	struct sock *sk;
 	spinlock_t *lock;
 	int connected;
 	u32 conn_type;
@@ -106,7 +106,7 @@ struct tipc_port_list;
 /*
  * TIPC port manipulation routines
  */
-struct tipc_port *tipc_createport(void *usr_handle,
+struct tipc_port *tipc_createport(struct sock *sk,
 		u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
 		void (*wakeup)(struct tipc_port *), const u32 importance);
 

net/tipc/socket.c

@@ -1406,7 +1406,7 @@ static int backlog_rcv(struct sock *sk, struct sk_buff *buf)
  */
 static u32 dispatch(struct tipc_port *tport, struct sk_buff *buf)
 {
-	struct sock *sk = (struct sock *)tport->usr_handle;
+	struct sock *sk = tport->sk;
 	u32 res;
 
 	/*
@@ -1437,7 +1437,7 @@ static u32 dispatch(struct tipc_port *tport, struct sk_buff *buf)
  */
 static void wakeupdispatch(struct tipc_port *tport)
 {
-	struct sock *sk = (struct sock *)tport->usr_handle;
+	struct sock *sk = tport->sk;
 
 	sk->sk_write_space(sk);
 }