[LLC]: Fix TX window scaling
Signed-off-by: Jochen Friedrich <jochen@scram.de>
Acked-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/llc/llc_c_ac.c b/net/llc/llc_c_ac.c
index b0bcfb1..91fb6bc 100644
--- a/net/llc/llc_c_ac.c
+++ b/net/llc/llc_c_ac.c
@@ -866,7 +866,8 @@
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 @@
llc->dec_step = 0;
llc->dec_cntr = llc->inc_cntr = 2;
++llc->npta;
- if (llc->npta > 127)
- llc->npta = 127 ;
+ if (llc->npta > ~LLC_2_SEQ_NBR_MODULO)
+ llc->npta = ~LLC_2_SEQ_NBR_MODULO ;
} else
--llc->inc_cntr;
return 0;
@@ -1065,9 +1066,10 @@
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 @@
struct llc_sock *llc = llc_sk(sk);
llc->k += 1;
- if (llc->k > 128)
- llc->k = 128 ;
+ if (llc->k > ~LLC_2_SEQ_NBR_MODULO)
+ llc->k = ~LLC_2_SEQ_NBR_MODULO ;
return 0;
}
@@ -1309,7 +1311,7 @@
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;
}