From: Pedersen, Thomas <twp@qca.qualcomm.com>
Date: Wed, 28 Sep 2016 23:56:31 +0000 (-0700)
Subject: mac80211: mesh: decrease max drift
X-Git-Tag: v4.9-rc1~127^2~1^2~2
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=3a53731df7e2a6e238274d13aa8d4826f78030f9;p=karo-tx-linux.git

mac80211: mesh: decrease max drift

The old value was 30ms, which means mesh sync will treat
any value below as merely TSF drift. This isn't really
reasonable (typical drift is < 10us/s) since people
probably want to adjust TSF in smaller increments (for ie.
beacon collision avoidance) without mesh sync fighting
back.

Change max drift adjustment to 0.8ms, so manual TSF
adjustments can be made in 1ms increments, with some
margin.

Signed-off-by: Thomas Pedersen <twp@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---

diff --git a/net/mac80211/mesh_sync.c b/net/mac80211/mesh_sync.c
index 22ca43c500e4..faca22cd02b5 100644
--- a/net/mac80211/mesh_sync.c
+++ b/net/mac80211/mesh_sync.c
@@ -28,7 +28,7 @@
  * could be, for instance, in case a neighbor is restarted and its TSF counter
  * reset.
  */
-#define TOFFSET_MAXIMUM_ADJUSTMENT 30000		/* 30 ms */
+#define TOFFSET_MAXIMUM_ADJUSTMENT 800		/* 0.8 ms */
 
 struct sync_method {
 	u8 method;