chardev: Consolidate yank registration

There's currently five places where the yank function is being
registered and they all come right before tcp_chr_new_client(). Fold
them into it.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20260302092225.4088227-8-peter.maydell@linaro.org
[PMM: rebased]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

chardev/char-socket.c

@@ -905,6 +905,12 @@ static int tcp_chr_new_client(Chardev *chr, QIOChannelSocket *sioc)
     s->sioc = sioc;
     object_ref(OBJECT(sioc));
 
+    if (s->registered_yank) {
+        yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
+                               char_socket_yank_iochannel,
+                               QIO_CHANNEL(sioc));
+    }
+
     if (s->do_nodelay) {
         qio_channel_set_delay(s->ioc, false);
     }
@@ -943,11 +949,6 @@ static int tcp_chr_add_client(Chardev *chr, int fd)
     }
     tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
     tcp_chr_set_client_ioc_name(chr, sioc);
-    if (s->registered_yank) {
-        yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
-                               char_socket_yank_iochannel,
-                               QIO_CHANNEL(sioc));
-    }
     ret = tcp_chr_new_client(chr, sioc);
     object_unref(OBJECT(sioc));
     return ret;
@@ -962,11 +963,6 @@ static void tcp_chr_accept(QIONetListener *listener,
 
     tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
     tcp_chr_set_client_ioc_name(chr, cioc);
-    if (s->registered_yank) {
-        yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
-                               char_socket_yank_iochannel,
-                               QIO_CHANNEL(cioc));
-    }
     tcp_chr_new_client(chr, cioc);
 }
 
@@ -982,11 +978,6 @@ static int tcp_chr_connect_client_sync(Chardev *chr, Error **errp)
         object_unref(OBJECT(sioc));
         return -1;
     }
-    if (s->registered_yank) {
-        yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
-                               char_socket_yank_iochannel,
-                               QIO_CHANNEL(sioc));
-    }
     tcp_chr_new_client(chr, sioc);
     object_unref(OBJECT(sioc));
     return 0;
@@ -1002,11 +993,6 @@ static void tcp_chr_accept_server_sync(Chardev *chr)
     tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
     sioc = qio_net_listener_wait_client(s->listener);
     tcp_chr_set_client_ioc_name(chr, sioc);
-    if (s->registered_yank) {
-        yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
-                               char_socket_yank_iochannel,
-                               QIO_CHANNEL(sioc));
-    }
     tcp_chr_new_client(chr, sioc);
     object_unref(OBJECT(sioc));
 }
@@ -1180,11 +1166,6 @@ static void tcp_chr_connect_client_async(Chardev *chr)
     tcp_chr_change_state(s, TCP_CHARDEV_STATE_CONNECTING);
     sioc = qio_channel_socket_new();
     tcp_chr_set_client_ioc_name(chr, sioc);
-    if (s->registered_yank) {
-        yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
-                               char_socket_yank_iochannel,
-                               QIO_CHANNEL(sioc));
-    }
     /*
      * Normally code would use the qio_channel_socket_connect_async
      * method which uses a QIOTask + qio_task_set_error internally