[LLC]: allow datagram recvmsg

LLC receive is broken for SOCK_DGRAM.
If an application does recv() on a datagram socket and there
is no data present, don't return "not connected". Instead, just
do normal datagram semantics.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c
index 7465170a36ca..75c9b1480801 100644
--- a/net/llc/af_llc.c
+++ b/net/llc/af_llc.c
@@ -674,7 +674,7 @@ static int llc_ui_recvmsg(struct kiocb *iocb, struct socket *sock,
 
         lock_sock(sk);
         copied = -ENOTCONN;
-        if (sk->sk_state == TCP_LISTEN)
+        if (unlikely(sk->sk_type == SOCK_STREAM && sk->sk_state == TCP_LISTEN))
                 goto out;
 
         timeo = sock_rcvtimeo(sk, nonblock);
@@ -733,7 +733,7 @@ static int llc_ui_recvmsg(struct kiocb *iocb, struct socket *sock,
                         if (sk->sk_shutdown & RCV_SHUTDOWN)
                                 break;
 
-                        if (sk->sk_state == TCP_CLOSE) {
+                        if (sk->sk_type == SOCK_STREAM && sk->sk_state == TCP_CLOSE) {
                                 if (!sock_flag(sk, SOCK_DONE)) {
                                         /*
                                          * This occurs when user tries to read