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Commit 59c6196e authored by Jochen Friedrich's avatar Jochen Friedrich Committed by David S. Miller
Browse files

[LLC]: Fix TX window scaling 



Signed-off-by: default avatarJochen Friedrich <jochen@scram.de>
Acked-by: default avatarArnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent cb422c46

net/llc/llc_c_ac.c

+11 −9
Original line number Diff line number Diff line
@@ -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 > ~LLC_2_SEQ_NBR_MODULO)

			llc->npta = ~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);



	if (llc->k - unacked_pdu < 1)

		llc->k = 1;

	else

		llc->k -= unacked_pdu;

	if (llc->k < 2)

		llc->k = 2;

	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 > ~LLC_2_SEQ_NBR_MODULO)

		llc->k = ~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;

}