drm/nv50: use alternate source of SOR_MODE_CTRL for DP hack

[safe/jmp/linux-2.6] / net / ipv4 / tcp_htcp.c

diff --git a/net/ipv4/tcp_htcp.c b/net/ipv4/tcp_htcp.c
index fa61663..7c94a49 100644 (file)
--- a/net/ipv4/tcp_htcp.c
+++ b/net/ipv4/tcp_htcp.c
@@ -69,31 +69,31 @@ static u32 htcp_cwnd_undo(struct sock *sk)
        const struct tcp_sock *tp = tcp_sk(sk);
        struct htcp *ca = inet_csk_ca(sk);
 
-       ca->last_cong = ca->undo_last_cong;
-       ca->maxRTT = ca->undo_maxRTT;
-       ca->old_maxB = ca->undo_old_maxB;
+       if (ca->undo_last_cong) {
+               ca->last_cong = ca->undo_last_cong;
+               ca->maxRTT = ca->undo_maxRTT;
+               ca->old_maxB = ca->undo_old_maxB;
+               ca->undo_last_cong = 0;
+       }
 
        return max(tp->snd_cwnd, (tp->snd_ssthresh << 7) / ca->beta);
 }
 
-static inline void measure_rtt(struct sock *sk)
+static inline void measure_rtt(struct sock *sk, u32 srtt)
 {
        const struct inet_connection_sock *icsk = inet_csk(sk);
-       const struct tcp_sock *tp = tcp_sk(sk);
        struct htcp *ca = inet_csk_ca(sk);
-       u32 srtt = tp->srtt >> 3;
 
        /* keep track of minimum RTT seen so far, minRTT is zero at first */
        if (ca->minRTT > srtt || !ca->minRTT)
                ca->minRTT = srtt;
 
        /* max RTT */
-       if (icsk->icsk_ca_state == TCP_CA_Open
-           && tp->snd_ssthresh < 0xFFFF && htcp_ccount(ca) > 3) {
+       if (icsk->icsk_ca_state == TCP_CA_Open) {
                if (ca->maxRTT < ca->minRTT)
                        ca->maxRTT = ca->minRTT;
-               if (ca->maxRTT < srtt
-                   && srtt <= ca->maxRTT + msecs_to_jiffies(20))
+               if (ca->maxRTT < srtt &&
+                   srtt <= ca->maxRTT + msecs_to_jiffies(20))
                        ca->maxRTT = srtt;
        }
 }
@@ -108,12 +108,14 @@ static void measure_achieved_throughput(struct sock *sk, u32 pkts_acked, s32 rtt
        if (icsk->icsk_ca_state == TCP_CA_Open)
                ca->pkts_acked = pkts_acked;
 
+       if (rtt > 0)
+               measure_rtt(sk, usecs_to_jiffies(rtt));
+
        if (!use_bandwidth_switch)
                return;
 
        /* achieved throughput calculations */
-       if (icsk->icsk_ca_state != TCP_CA_Open &&
-           icsk->icsk_ca_state != TCP_CA_Disorder) {
+       if (!((1 << icsk->icsk_ca_state) & (TCPF_CA_Open | TCPF_CA_Disorder))) {
                ca->packetcount = 0;
                ca->lasttime = now;
                return;
@@ -121,9 +123,9 @@ static void measure_achieved_throughput(struct sock *sk, u32 pkts_acked, s32 rtt
 
        ca->packetcount += pkts_acked;
 
-       if (ca->packetcount >= tp->snd_cwnd - (ca->alpha >> 7 ? : 1)
-           && now - ca->lasttime >= ca->minRTT
-           && ca->minRTT > 0) {
+       if (ca->packetcount >= tp->snd_cwnd - (ca->alpha >> 7 ? : 1) &&
+           now - ca->lasttime >= ca->minRTT &&
+           ca->minRTT > 0) {
                __u32 cur_Bi = ca->packetcount * HZ / (now - ca->lasttime);
 
                if (htcp_ccount(ca) <= 3) {
@@ -225,8 +227,7 @@ static u32 htcp_recalc_ssthresh(struct sock *sk)
        return max((tp->snd_cwnd * ca->beta) >> 7, 2U);
 }
 
-static void htcp_cong_avoid(struct sock *sk, u32 ack,
-                           u32 in_flight, int data_acked)
+static void htcp_cong_avoid(struct sock *sk, u32 ack, u32 in_flight)
 {
        struct tcp_sock *tp = tcp_sk(sk);
        struct htcp *ca = inet_csk_ca(sk);
@@ -237,8 +238,6 @@ static void htcp_cong_avoid(struct sock *sk, u32 ack,
        if (tp->snd_cwnd <= tp->snd_ssthresh)
                tcp_slow_start(tp);
        else {
-               measure_rtt(sk);
-
                /* In dangerous area, increase slowly.
                 * In theory this is tp->snd_cwnd += alpha / tp->snd_cwnd
                 */
@@ -271,7 +270,10 @@ static void htcp_state(struct sock *sk, u8 new_state)
        case TCP_CA_Open:
                {
                        struct htcp *ca = inet_csk_ca(sk);
-                       ca->last_cong = jiffies;
+                       if (ca->undo_last_cong) {
+                               ca->last_cong = jiffies;
+                               ca->undo_last_cong = 0;
+                       }
                }
                break;
        case TCP_CA_CWR: