[PATCH] Code cleanups in calbacks in svcsock

Change a printk(KERN_WARNING to dprintk, and it is really only interesting
when trying to debug a problem, and can occur normally without error.

Remove various gratuitous gotos in surrounding code, and remove some
type-cast assignments from inside 'if' conditionals, as that is just
obscuring what it going on.
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

net/sunrpc/svcsock.c

@@ -512,15 +512,14 @@ svc_sock_setbufsize(struct socket *sock, unsigned int snd, unsigned int rcv)
 static void
 svc_udp_data_ready(struct sock *sk, int count)
 {
-	struct svc_sock	*svsk = (struct svc_sock *)(sk->sk_user_data);
+	struct svc_sock	*svsk = (struct svc_sock *)sk->sk_user_data;
 
-	if (!svsk)
-		goto out;
-	dprintk("svc: socket %p(inet %p), count=%d, busy=%d\n",
-		svsk, sk, count, test_bit(SK_BUSY, &svsk->sk_flags));
-	set_bit(SK_DATA, &svsk->sk_flags);
-	svc_sock_enqueue(svsk);
- out:
+	if (svsk) {
+		dprintk("svc: socket %p(inet %p), count=%d, busy=%d\n",
+			svsk, sk, count, test_bit(SK_BUSY, &svsk->sk_flags));
+		set_bit(SK_DATA, &svsk->sk_flags);
+		svc_sock_enqueue(svsk);
+	}
 	if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
 		wake_up_interruptible(sk->sk_sleep);
 }
@@ -540,7 +539,7 @@ svc_write_space(struct sock *sk)
 	}
 
 	if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) {
-		printk(KERN_WARNING "RPC svc_write_space: some sleeping on %p\n",
+		dprintk("RPC svc_write_space: someone sleeping on %p\n",
 		       svsk);
 		wake_up_interruptible(sk->sk_sleep);
 	}
@@ -692,31 +691,29 @@ svc_udp_init(struct svc_sock *svsk)
 static void
 svc_tcp_listen_data_ready(struct sock *sk, int count_unused)
 {
-	struct svc_sock	*svsk;
+	struct svc_sock	*svsk = (struct svc_sock *)sk->sk_user_data;
 
 	dprintk("svc: socket %p TCP (listen) state change %d\n",
-			sk, sk->sk_state);
+		sk, sk->sk_state);
 
-	if  (sk->sk_state != TCP_LISTEN) {
-		/*
-		 * This callback may called twice when a new connection
-		 * is established as a child socket inherits everything
-		 * from a parent LISTEN socket.
-		 * 1) data_ready method of the parent socket will be called
-		 *    when one of child sockets become ESTABLISHED.
-		 * 2) data_ready method of the child socket may be called
-		 *    when it receives data before the socket is accepted.
-		 * In case of 2, we should ignore it silently.
-		 */
-		goto out;
-	}
-	if (!(svsk = (struct svc_sock *) sk->sk_user_data)) {
-		printk("svc: socket %p: no user data\n", sk);
-		goto out;
+	/*
+	 * This callback may called twice when a new connection
+	 * is established as a child socket inherits everything
+	 * from a parent LISTEN socket.
+	 * 1) data_ready method of the parent socket will be called
+	 *    when one of child sockets become ESTABLISHED.
+	 * 2) data_ready method of the child socket may be called
+	 *    when it receives data before the socket is accepted.
+	 * In case of 2, we should ignore it silently.
+	 */
+	if (sk->sk_state == TCP_LISTEN) {
+		if (svsk) {
+			set_bit(SK_CONN, &svsk->sk_flags);
+			svc_sock_enqueue(svsk);
+		} else
+			printk("svc: socket %p: no user data\n", sk);
 	}
-	set_bit(SK_CONN, &svsk->sk_flags);
-	svc_sock_enqueue(svsk);
- out:
+
 	if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
 		wake_up_interruptible_all(sk->sk_sleep);
 }
@@ -727,18 +724,17 @@ svc_tcp_listen_data_ready(struct sock *sk, int count_unused)
 static void
 svc_tcp_state_change(struct sock *sk)
 {
-	struct svc_sock	*svsk;
+	struct svc_sock	*svsk = (struct svc_sock *)sk->sk_user_data;
 
 	dprintk("svc: socket %p TCP (connected) state change %d (svsk %p)\n",
-			sk, sk->sk_state, sk->sk_user_data);
+		sk, sk->sk_state, sk->sk_user_data);
 
-	if (!(svsk = (struct svc_sock *) sk->sk_user_data)) {
+	if (!svsk)
 		printk("svc: socket %p: no user data\n", sk);
-		goto out;
+	else {
+		set_bit(SK_CLOSE, &svsk->sk_flags);
+		svc_sock_enqueue(svsk);
 	}
-	set_bit(SK_CLOSE, &svsk->sk_flags);
-	svc_sock_enqueue(svsk);
- out:
 	if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
 		wake_up_interruptible_all(sk->sk_sleep);
 }
@@ -746,15 +742,14 @@ svc_tcp_state_change(struct sock *sk)
 static void
 svc_tcp_data_ready(struct sock *sk, int count)
 {
-	struct svc_sock *	svsk;
+	struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data;
 
 	dprintk("svc: socket %p TCP data ready (svsk %p)\n",
-			sk, sk->sk_user_data);
-	if (!(svsk = (struct svc_sock *)(sk->sk_user_data)))
-		goto out;
-	set_bit(SK_DATA, &svsk->sk_flags);
-	svc_sock_enqueue(svsk);
- out:
+		sk, sk->sk_user_data);
+	if (svsk) {
+		set_bit(SK_DATA, &svsk->sk_flags);
+		svc_sock_enqueue(svsk);
+	}
 	if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
 		wake_up_interruptible(sk->sk_sleep);
 }