From ff13bd5872f0bf14f887df033471d922310de653 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Deronne?= <sebastien.deronne@gmail.com>
Date: Mon, 8 Feb 2016 22:53:58 +0100
Subject: [PATCH] wifi: DCF manager should not reset CW when CWmin or CWmax is
 unchanged

---
 src/wifi/model/dcf-manager.cc | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/wifi/model/dcf-manager.cc b/src/wifi/model/dcf-manager.cc
index f77b625ae..b475027e8 100644
--- a/src/wifi/model/dcf-manager.cc
+++ b/src/wifi/model/dcf-manager.cc
@@ -61,15 +61,23 @@ DcfState::SetAifsn (uint32_t aifsn)
 void
 DcfState::SetCwMin (uint32_t minCw)
 {
+  bool changed = (m_cwMin == minCw);
   m_cwMin = minCw;
-  ResetCw ();
+  if (changed == true)
+    {
+      ResetCw ();
+    }
 }
 
 void
 DcfState::SetCwMax (uint32_t maxCw)
 {
+  bool changed = (m_cwMax == maxCw);
   m_cwMax = maxCw;
-  ResetCw ();
+  if (changed == true)
+    {
+      ResetCw ();
+    }
 }
 
 uint32_t