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[DCCP] ccid3: Simplify control flow of ccid3_hc_tx_send_packet

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This makes some logically equivalent simplifications, by replacing
rc - values plus goto's with direct return statements.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
This commit is contained in:
Gerrit Renker 2006-11-27 12:26:03 -02:00 committed by David S. Miller
parent 91cf5a1725
commit 7da7f456d7
1 changed files with 18 additions and 22 deletions
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40
net/dccp/ccids/ccid3.c
View file

@ -247,6 +247,12 @@ static void ccid3_hc_tx_no_feedback_timer(unsigned long data)
sock_put(sk);
}
/*
* returns
* > 0: delay (in msecs) that should pass before actually sending
* = 0: can send immediately
* < 0: error condition; do not send packet
*/
static int ccid3_hc_tx_send_packet(struct sock *sk,
struct sk_buff *skb, int len)
{
@ -255,7 +261,6 @@ static int ccid3_hc_tx_send_packet(struct sock *sk,
struct dccp_tx_hist_entry *new_packet;
struct timeval now;
long delay;
int rc = -ENOTCONN;
BUG_ON(hctx == NULL);
@ -265,7 +270,7 @@ static int ccid3_hc_tx_send_packet(struct sock *sk,
* packets can have zero length, but why the comment about "pure ACK"?
*/
if (unlikely(len == 0))
goto out;
return -ENOTCONN;
/* See if last packet allocated was not sent */
new_packet = dccp_tx_hist_head(&hctx->ccid3hctx_hist);
@ -273,11 +278,10 @@ static int ccid3_hc_tx_send_packet(struct sock *sk,
new_packet = dccp_tx_hist_entry_new(ccid3_tx_hist,
SLAB_ATOMIC);
rc = -ENOBUFS;
if (unlikely(new_packet == NULL)) {
DCCP_WARN("%s, sk=%p, not enough mem to add to history,"
"send refused\n", dccp_role(sk), sk);
goto out;
return -ENOBUFS;
}
dccp_tx_hist_add_entry(&hctx->ccid3hctx_hist, new_packet);
@ -300,7 +304,6 @@ static int ccid3_hc_tx_send_packet(struct sock *sk,
/* Set t_0 for initial packet */
hctx->ccid3hctx_t_nom = now;
rc = 0;
break;
case TFRC_SSTATE_NO_FBACK:
case TFRC_SSTATE_FBACK:
@ -313,28 +316,21 @@ static int ccid3_hc_tx_send_packet(struct sock *sk,
* else
* // send the packet in (t_nom - t_now) milliseconds.
*/
if (delay < hctx->ccid3hctx_delta)
rc = 0;
else
rc = delay/1000L;
if (delay >= hctx->ccid3hctx_delta)
return delay / 1000L;
break;
case TFRC_SSTATE_TERM:
DCCP_BUG("Illegal %s state TERM, sk=%p", dccp_role(sk), sk);
rc = -EINVAL;
break;
return -EINVAL;
}
/* Can we send? if so add options and add to packet history */
if (rc == 0) {
dp->dccps_hc_tx_insert_options = 1;
new_packet->dccphtx_ccval =
DCCP_SKB_CB(skb)->dccpd_ccval =
hctx->ccid3hctx_last_win_count;
timeval_add_usecs(&hctx->ccid3hctx_t_nom,
hctx->ccid3hctx_t_ipi);
}
out:
return rc;
/* prepare to send now (add options etc.) */
dp->dccps_hc_tx_insert_options = 1;
new_packet->dccphtx_ccval = DCCP_SKB_CB(skb)->dccpd_ccval =
hctx->ccid3hctx_last_win_count;
timeval_add_usecs(&hctx->ccid3hctx_t_nom, hctx->ccid3hctx_t_ipi);
return 0;
}
static void ccid3_hc_tx_packet_sent(struct sock *sk, int more, int len)