2 files changed, 20 insertions, 16 deletions

diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c
index 59d02cbbeb..8171c53bc0 100644
--- a/net/llc/af_llc.c
+++ b/net/llc/af_llc.c
@@ -36,7 +36,7 @@
 static u16 llc_ui_sap_last_autoport = LLC_SAP_DYN_START;
 static u16 llc_ui_sap_link_no_max[256];
 static struct sockaddr_llc llc_ui_addrnull;
-static struct proto_ops llc_ui_ops;
+static const struct proto_ops llc_ui_ops;
 
 static int llc_ui_wait_for_conn(struct sock *sk, long timeout);
 static int llc_ui_wait_for_disc(struct sock *sk, long timeout);
@@ -116,7 +116,9 @@ static int llc_ui_send_data(struct sock* sk, struct sk_buff *skb, int noblock)
         struct llc_sock* llc = llc_sk(sk);
         int rc = 0;
 
-        if (unlikely(llc_data_accept_state(llc->state) || llc->p_flag)) {
+        if (unlikely(llc_data_accept_state(llc->state) || 
+                     llc->remote_busy_flag ||
+                     llc->p_flag)) {
                 long timeout = sock_sndtimeo(sk, noblock);
 
                 rc = llc_ui_wait_for_busy_core(sk, timeout);
@@ -542,6 +544,7 @@ static int llc_ui_wait_for_busy_core(struct sock *sk, long timeout)
                 if (sk_wait_event(sk, &timeout,
                                   (sk->sk_shutdown & RCV_SHUTDOWN) ||
                                   (!llc_data_accept_state(llc->state) &&
+                                   !llc->remote_busy_flag &&
                                    !llc->p_flag)))
                         break;
                 rc = -ERESTARTSYS;
@@ -563,10 +566,9 @@ static int llc_wait_data(struct sock *sk, long timeo)
                 /*
                  * POSIX 1003.1g mandates this order.
                  */
-                if (sk->sk_err) {
-                        rc = sock_error(sk);
+                rc = sock_error(sk);
+                if (rc)
                         break;
-                }
                 rc = 0;
                 if (sk->sk_shutdown & RCV_SHUTDOWN)
                         break;
@@ -957,7 +959,7 @@ out:
 static int llc_ui_ioctl(struct socket *sock, unsigned int cmd,
                         unsigned long arg)
 {
-        return dev_ioctl(cmd, (void __user *)arg);
+        return -ENOIOCTLCMD;
 }
 
 /**
@@ -1096,7 +1098,7 @@ static struct net_proto_family llc_ui_family_ops = {
         .owner  = THIS_MODULE,
 };
 
-static struct proto_ops llc_ui_ops = {
+static const struct proto_ops llc_ui_ops = {
         .family      = PF_LLC,
         .owner       = THIS_MODULE,
         .release     = llc_ui_release,
diff --git a/net/llc/llc_c_ac.c b/net/llc/llc_c_ac.c
index b0bcfb1f12..8169f24ed3 100644
--- a/net/llc/llc_c_ac.c
+++ b/net/llc/llc_c_ac.c
@@ -866,7 +866,8 @@ int llc_conn_ac_send_ack_if_needed(struct sock *sk, struct sk_buff *skb)
                 llc->ack_must_be_send = 1;
                 llc->ack_pf = pf_bit & 1;
         }
-        if (((llc->vR - llc->first_pdu_Ns + 129) % 128) >= llc->npta) {
+        if (((llc->vR - llc->first_pdu_Ns + 1 + LLC_2_SEQ_NBR_MODULO)
+                        % LLC_2_SEQ_NBR_MODULO) >= llc->npta) {
                 llc_conn_ac_send_rr_rsp_f_set_ackpf(sk, skb);
                 llc->ack_must_be_send   = 0;
                 llc->ack_pf             = 0;
@@ -994,8 +995,8 @@ static int llc_conn_ac_inc_npta_value(struct sock *sk, struct sk_buff *skb)
                 llc->dec_step = 0;
                 llc->dec_cntr = llc->inc_cntr = 2;
                 ++llc->npta;
-                if (llc->npta > 127)
-                        llc->npta = 127 ;
+                if (llc->npta > (u8) ~LLC_2_SEQ_NBR_MODULO)
+                        llc->npta = (u8) ~LLC_2_SEQ_NBR_MODULO;
         } else
                 --llc->inc_cntr;
         return 0;
@@ -1065,9 +1066,10 @@ int llc_conn_ac_dec_tx_win_size(struct sock *sk, struct sk_buff *skb)
         struct llc_sock *llc = llc_sk(sk);
         u8 unacked_pdu = skb_queue_len(&llc->pdu_unack_q);
 
-        llc->k -= unacked_pdu;
-        if (llc->k < 2)
-                llc->k = 2;
+        if (llc->k - unacked_pdu < 1)
+                llc->k = 1;
+        else
+                llc->k -= unacked_pdu;
         return 0;
 }
 
@@ -1084,8 +1086,8 @@ int llc_conn_ac_inc_tx_win_size(struct sock *sk, struct sk_buff *skb)
         struct llc_sock *llc = llc_sk(sk);
 
         llc->k += 1;
-        if (llc->k > 128)
-                llc->k = 128 ;
+        if (llc->k > (u8) ~LLC_2_SEQ_NBR_MODULO)
+                llc->k = (u8) ~LLC_2_SEQ_NBR_MODULO;
         return 0;
 }
 
@@ -1309,7 +1311,7 @@ int llc_conn_ac_set_vs_nr(struct sock *sk, struct sk_buff *skb)
 
 static int llc_conn_ac_inc_vs_by_1(struct sock *sk, struct sk_buff *skb)
 {
-        llc_sk(sk)->vS = (llc_sk(sk)->vS + 1) % 128;
+        llc_sk(sk)->vS = (llc_sk(sk)->vS + 1) % LLC_2_SEQ_NBR_MODULO;
         return 0;
 }