1 files changed, 16 insertions, 14 deletions

diff --git a/drivers/isdn/mISDN/socket.c b/drivers/isdn/mISDN/socket.c
index 916569ca156d..508945d1b9c1 100644
--- a/drivers/isdn/mISDN/socket.c
+++ b/drivers/isdn/mISDN/socket.c
@@ -483,22 +483,24 @@ data_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
                 goto done;
         }
 
-        read_lock_bh(&data_sockets.lock);
-        sk_for_each(csk, node, &data_sockets.head) {
-                if (sk == csk)
-                        continue;
-                if (_pms(csk)->dev != _pms(sk)->dev)
-                        continue;
-                if (csk->sk_protocol >= ISDN_P_B_START)
-                        continue;
-                if (IS_ISDN_P_TE(csk->sk_protocol)
-                                == IS_ISDN_P_TE(sk->sk_protocol))
-                        continue;
+        if (sk->sk_protocol < ISDN_P_B_START) {
+                read_lock_bh(&data_sockets.lock);
+                sk_for_each(csk, node, &data_sockets.head) {
+                        if (sk == csk)
+                                continue;
+                        if (_pms(csk)->dev != _pms(sk)->dev)
+                                continue;
+                        if (csk->sk_protocol >= ISDN_P_B_START)
+                                continue;
+                        if (IS_ISDN_P_TE(csk->sk_protocol)
+                                        == IS_ISDN_P_TE(sk->sk_protocol))
+                                continue;
+                        read_unlock_bh(&data_sockets.lock);
+                        err = -EBUSY;
+                        goto done;
+                }
                 read_unlock_bh(&data_sockets.lock);
-                err = -EBUSY;
-                goto done;
         }
-        read_unlock_bh(&data_sockets.lock);
 
         _pms(sk)->ch.send = mISDN_send;
         _pms(sk)->ch.ctrl = mISDN_ctrl;