sctp: Fix problems with the new SCTP_DELAYED_ACK code

The default sack frequency should be 2.  Also fix copy/paste
error when updating all transports.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 81600eea0..253e5ea 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -2471,7 +2471,7 @@
 					(trans->param_flags & ~SPP_SACKDELAY) |
 					SPP_SACKDELAY_ENABLE;
 			}
-			if (params.sack_delay == 1) {
+			if (params.sack_freq == 1) {
 				trans->param_flags =
 					(trans->param_flags & ~SPP_SACKDELAY) |
 					SPP_SACKDELAY_DISABLE;
@@ -3536,7 +3536,7 @@
 	sp->pathmaxrxt  = sctp_max_retrans_path;
 	sp->pathmtu     = 0; // allow default discovery
 	sp->sackdelay   = sctp_sack_timeout;
-	sp->sackfreq	= 3;
+	sp->sackfreq	= 2;
 	sp->param_flags = SPP_HB_ENABLE |
 			  SPP_PMTUD_ENABLE |
 			  SPP_SACKDELAY_ENABLE;