Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (54 commits)
  glge: remove unused #include <version.h>
  dnet: remove unused #include <version.h>
  tcp: miscounts due to tcp_fragment pcount reset
  tcp: add helper for counter tweaking due mid-wq change
  hso: fix for the 'invalid frame length' messages
  hso: fix for crash when unplugging the device
  fsl_pq_mdio: Fix compile failure
  fsl_pq_mdio: Revive UCC MDIO support
  ucc_geth: Pass proper device to DMA routines, otherwise oops happens
  i.MX31: Fixing cs89x0 network building to i.MX31ADS
  tc35815: Fix build error if NAPI enabled
  hso: add Vendor/Product ID's for new devices
  ucc_geth: Remove unused header
  gianfar: Remove unused header
  kaweth: Fix locking to be SMP-safe
  net: allow multiple dev per napi with GRO
  r8169: reset IntrStatus after chip reset
  ixgbe: Fix potential memory leak/driver panic issue while setting up Tx & Rx ring parameters
  ixgbe: fix ethtool -A|a behavior
  ixgbe: Patch to fix driver panic while freeing up tx & rx resources
  ...

1 files changed, 40 insertions, 33 deletions

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index c1f259d2d33..53300fa2359 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -754,6 +754,36 @@ static void tcp_adjust_fackets_out(struct sock *sk, struct sk_buff *skb,
                 tp->fackets_out -= decr;
 }
 
+/* Pcount in the middle of the write queue got changed, we need to do various
+ * tweaks to fix counters
+ */
+static void tcp_adjust_pcount(struct sock *sk, struct sk_buff *skb, int decr)
+{
+        struct tcp_sock *tp = tcp_sk(sk);
+
+        tp->packets_out -= decr;
+
+        if (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_ACKED)
+                tp->sacked_out -= decr;
+        if (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_RETRANS)
+                tp->retrans_out -= decr;
+        if (TCP_SKB_CB(skb)->sacked & TCPCB_LOST)
+                tp->lost_out -= decr;
+
+        /* Reno case is special. Sigh... */
+        if (tcp_is_reno(tp) && decr > 0)
+                tp->sacked_out -= min_t(u32, tp->sacked_out, decr);
+
+        tcp_adjust_fackets_out(sk, skb, decr);
+
+        if (tp->lost_skb_hint &&
+            before(TCP_SKB_CB(skb)->seq, TCP_SKB_CB(tp->lost_skb_hint)->seq) &&
+            (tcp_is_fack(tp) || TCP_SKB_CB(skb)->sacked))
+                tp->lost_cnt_hint -= decr;
+
+        tcp_verify_left_out(tp);
+}
+
 /* Function to create two new TCP segments.  Shrinks the given segment
  * to the specified size and appends a new segment with the rest of the
  * packet to the list.  This won't be called frequently, I hope.
@@ -836,28 +866,8 @@ int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len,
                 int diff = old_factor - tcp_skb_pcount(skb) -
                         tcp_skb_pcount(buff);
 
-                tp->packets_out -= diff;
-
-                if (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_ACKED)
-                        tp->sacked_out -= diff;
-                if (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_RETRANS)
-                        tp->retrans_out -= diff;
-
-                if (TCP_SKB_CB(skb)->sacked & TCPCB_LOST)
-                        tp->lost_out -= diff;
-
-                /* Adjust Reno SACK estimate. */
-                if (tcp_is_reno(tp) && diff > 0) {
-                        tcp_dec_pcount_approx_int(&tp->sacked_out, diff);
-                        tcp_verify_left_out(tp);
-                }
-                tcp_adjust_fackets_out(sk, skb, diff);
-
-                if (tp->lost_skb_hint &&
-                    before(TCP_SKB_CB(skb)->seq,
-                           TCP_SKB_CB(tp->lost_skb_hint)->seq) &&
-                    (tcp_is_fack(tp) || TCP_SKB_CB(skb)->sacked))
-                        tp->lost_cnt_hint -= diff;
+                if (diff)
+                        tcp_adjust_pcount(sk, skb, diff);
         }
 
         /* Link BUFF into the send queue. */
@@ -1768,22 +1778,14 @@ static void tcp_collapse_retrans(struct sock *sk, struct sk_buff *skb)
          * packet counting does not break.
          */
         TCP_SKB_CB(skb)->sacked |= TCP_SKB_CB(next_skb)->sacked & TCPCB_EVER_RETRANS;
-        if (TCP_SKB_CB(next_skb)->sacked & TCPCB_SACKED_RETRANS)
-                tp->retrans_out -= tcp_skb_pcount(next_skb);
-        if (TCP_SKB_CB(next_skb)->sacked & TCPCB_LOST)
-                tp->lost_out -= tcp_skb_pcount(next_skb);
-        /* Reno case is special. Sigh... */
-        if (tcp_is_reno(tp) && tp->sacked_out)
-                tcp_dec_pcount_approx(&tp->sacked_out, next_skb);
-
-        tcp_adjust_fackets_out(sk, next_skb, tcp_skb_pcount(next_skb));
-        tp->packets_out -= tcp_skb_pcount(next_skb);
 
         /* changed transmit queue under us so clear hints */
         tcp_clear_retrans_hints_partial(tp);
         if (next_skb == tp->retransmit_skb_hint)
                 tp->retransmit_skb_hint = skb;
 
+        tcp_adjust_pcount(sk, next_skb, tcp_skb_pcount(next_skb));
+
         sk_wmem_free_skb(sk, next_skb);
 }
 
@@ -1891,7 +1893,12 @@ int tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb)
                 if (tcp_fragment(sk, skb, cur_mss, cur_mss))
                         return -ENOMEM; /* We'll try again later. */
         } else {
-                tcp_init_tso_segs(sk, skb, cur_mss);
+                int oldpcount = tcp_skb_pcount(skb);
+
+                if (unlikely(oldpcount > 1)) {
+                        tcp_init_tso_segs(sk, skb, cur_mss);
+                        tcp_adjust_pcount(sk, skb, oldpcount - tcp_skb_pcount(skb));
+                }
         }
 
         tcp_retrans_try_collapse(sk, skb, cur_mss);