[CCID3] Initialize ccid3hctx_t_ipi to 250ms

To match more closely what is described in RFC 3448.
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: Ian McDonald <iam4@cs.waikato.ac.nz>

net/dccp/ccids/ccid3.c

@@ -328,7 +328,7 @@ static int ccid3_hc_tx_send_packet(struct sock *sk,
 		hctx->ccid3hctx_last_win_count	 = 0;
 		hctx->ccid3hctx_t_last_win_count = now;
 		ccid3_hc_tx_set_state(sk, TFRC_SSTATE_NO_FBACK);
-		hctx->ccid3hctx_t_ipi = TFRC_INITIAL_TIMEOUT;
+		hctx->ccid3hctx_t_ipi = TFRC_INITIAL_IPI;
 
 		/* Set nominal send time for initial packet */
 		hctx->ccid3hctx_t_nom = now;

net/dccp/ccids/ccid3.h

@@ -48,6 +48,8 @@
 /* Two seconds as per CCID3 spec */
 #define TFRC_INITIAL_TIMEOUT	   (2 * USEC_PER_SEC)
 
+#define TFRC_INITIAL_IPI	   (USEC_PER_SEC / 4)
+
 /* In usecs - half the scheduling granularity as per RFC3448 4.6 */
 #define TFRC_OPSYS_HALF_TIME_GRAN  (USEC_PER_SEC / (2 * HZ))