[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>

diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 51885b5..30ec3ef 100644 (file)
--- a/net/sunrpc/svcsock.c
+++ b/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);
 }