3 files changed, 12 insertions, 0 deletions

diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index 78740ec57d5d..fa6cde578a1d 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -128,6 +128,7 @@ extern int sctp_register_pf(struct sctp_pf *, sa_family_t);
 int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb);
 int sctp_inet_listen(struct socket *sock, int backlog);
 void sctp_write_space(struct sock *sk);
+void sctp_data_ready(struct sock *sk, int len);
 unsigned int sctp_poll(struct file *file, struct socket *sock,
                 poll_table *wait);
 void sctp_sock_rfree(struct sk_buff *skb);
diff --git a/net/sctp/endpointola.c b/net/sctp/endpointola.c
index 905fda582b92..7ec09ba03a1c 100644
--- a/net/sctp/endpointola.c
+++ b/net/sctp/endpointola.c
@@ -144,6 +144,7 @@ static struct sctp_endpoint *sctp_endpoint_init(struct sctp_endpoint *ep,
         /* Use SCTP specific send buffer space queues.  */
         ep->sndbuf_policy = sctp_sndbuf_policy;
 
+        sk->sk_data_ready = sctp_data_ready;
         sk->sk_write_space = sctp_write_space;
         sock_set_flag(sk, SOCK_USE_WRITE_QUEUE);
 
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 007e8baba089..efa2bc3f0028 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -6189,6 +6189,16 @@ do_nonblock:
         goto out;
 }
 
+void sctp_data_ready(struct sock *sk, int len)
+{
+        read_lock_bh(&sk->sk_callback_lock);
+        if (sk_has_sleeper(sk))
+                wake_up_interruptible_sync_poll(sk->sk_sleep, POLLIN |
+                                                POLLRDNORM | POLLRDBAND);
+        sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
+        read_unlock_bh(&sk->sk_callback_lock);
+}
+
 /* If socket sndbuf has changed, wake up all per association waiters.  */
 void sctp_write_space(struct sock *sk)
 {