tipc: eliminate function tipc_port_shutdown()
tipc_port_shutdown() is a remnant from the now obsolete native
interface. As such it grabs port_lock in order to protect itself
from concurrent BH processing.
However, after the recent changes to the port/socket upcalls, sockets
are now basically single-threaded, and all execution, except the read-only
tipc_sk_timer(), is executing within the protection of lock_sock(). So
the use of port_lock is not needed here.
In this commit we eliminate the whole function, and merge it into its
only caller, tipc_shutdown().
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 5f8376e..f202d47 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -1899,7 +1899,7 @@
struct tipc_sock *tsk = tipc_sk(sk);
struct tipc_port *port = &tsk->port;
struct sk_buff *buf;
- u32 peer;
+ u32 dnode;
int res;
if (how != SHUT_RDWR)
@@ -1920,10 +1920,17 @@
goto restart;
}
tipc_port_disconnect(port->ref);
- if (tipc_msg_reverse(buf, &peer, TIPC_CONN_SHUTDOWN))
- tipc_link_xmit(buf, peer, 0);
+ if (tipc_msg_reverse(buf, &dnode, TIPC_CONN_SHUTDOWN))
+ tipc_link_xmit(buf, dnode, port->ref);
} else {
- tipc_port_shutdown(port->ref);
+ dnode = tipc_port_peernode(port);
+ buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE,
+ TIPC_CONN_MSG, SHORT_H_SIZE,
+ 0, dnode, tipc_own_addr,
+ tipc_port_peerport(port),
+ port->ref, TIPC_CONN_SHUTDOWN);
+ tipc_link_xmit(buf, dnode, port->ref);
+ __tipc_port_disconnect(port);
}
sock->state = SS_DISCONNECTING;