diff options
| author | Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2006-11-27 12:27:55 -0200 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-12-02 21:30:40 -0800 |
| commit | 70dbd5b0ef3915f1e018e6437c8db9e999b0d701 (patch) | |
| tree | 370f202cff866337ba3c2520bd33e9ef4ab17178 /net/dccp | |
| parent | da335baf9e788edfb00ee3b96f7b9526b6b2f8a9 (diff) | |
[DCCP] ccid3: Remove redundant statements in ccid3_hc_tx_packet_sent
This patch removes a switch statement which is redundant since,
* nothing is done in states TFRC_SSTATE_NO_SENT/TFRC_SSTATE_NO_FBACK
* it is impossible that the function is called in the state TFRC_SSTATE_TERM, since
--the function is called, in dccp_write_xmit, after ccid3_hc_tx_send_packet
--if ccid3_hc_tx_send_packet is called in state TFRC_SSTATE_TERM, it returns
-EINVAL, which means that ccid3_hc_tx_packet_sent will not be called
(compare dccp_write_xmit)
--> therefore, this case is logically impossible
* the remaining state is TFRC_SSTATE_FBACK which conditionally updates t_ipi, t_nom,
and t_delta. This is a no-op, since
--t_ipi only changes when feedback is received
--however, when feedback arrives via ccid3_hc_tx_packet_recv, there is an identical
code block which performs the same set of operations
--performing the same set of operations again in ccid3_hc_tx_packet_sent therefore
does not change anything, since between the time of receiving the last feedback
(and therefore update of t_ipi, t_nom, and t_delta), the value of t_ipi has not
changed
--since t_ipi has not changed, the values of t_delta and t_nom also do not change,
they depend fully on t_ipi
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Diffstat (limited to 'net/dccp')
| -rw-r--r-- | net/dccp/ccids/ccid3.c | 21 |
1 files changed, 0 insertions, 21 deletions
diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c index 62c304200ed..58f7cac6aa3 100644 --- a/net/dccp/ccids/ccid3.c +++ b/net/dccp/ccids/ccid3.c @@ -384,27 +384,6 @@ static void ccid3_hc_tx_packet_sent(struct sock *sk, int more, int len) } else ccid3_pr_debug("%s, sk=%p, seqno=%llu NOT inserted!\n", dccp_role(sk), sk, dp->dccps_gss); - - switch (hctx->ccid3hctx_state) { - case TFRC_SSTATE_NO_SENT: - /* fall through */ - case TFRC_SSTATE_NO_FBACK: - /* t_nom, t_ipi, delta do not change until feedback arrives */ - return; - case TFRC_SSTATE_FBACK: - if (len > 0) { - timeval_sub_usecs(&hctx->ccid3hctx_t_nom, - hctx->ccid3hctx_t_ipi); - ccid3_calc_new_t_ipi(hctx); - ccid3_calc_new_delta(hctx); - timeval_add_usecs(&hctx->ccid3hctx_t_nom, - hctx->ccid3hctx_t_ipi); - } - break; - case TFRC_SSTATE_TERM: - DCCP_BUG("Illegal %s state TERM, sk=%p", dccp_role(sk), sk); - break; - } } static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb) |