Re: Flush scan list on resume

[Howard Chu <hyc symas com>]

Howard Chu wrote:
> Tony Espy wrote:
> > I still think simple ( ie. either have mac80211 handle the expiration or
> > flush of scan results on resume ) wins out over the more complicated
> > approach of having the connection manager handle expiration of older
> > scan results.
> >
> > Also a mobile device ( eg. a netbook or OLPC ) could be moving relative
> > to the same set of access points while in S3 ( ie. within a single
> > office and/or building ), and that the cached scan results after resume
> > could reflect inaccurate relative signal strengths of the the APs.  This
> > could effect roaming performance.
>
> Yeah, good point. This is also trivial to implement - just call
> ieee80211_rx_bss_list_deinit(local) in pm.c: __iee80211_suspend(). I'm going
> to play with this approach first.

Yes, this works fine for me.

compat-wireless-2009-02-05/net/mac80211
--- pm.c.O	2009-02-04 21:14:21.000000000 -0800
+++ pm.c	2009-02-05 02:31:47.000000000 -0800
@@ -52,6 +52,10 @@
 		ieee80211_led_radio(local, false);
 		local->ops->stop(hw);
 	}
+
+	/* flush scan list */
+	ieee80211_rx_bss_list_deinit(local);
+
 	return 0;
 }



--
  -- Howard Chu
  CTO, Symas Corp.           http://www.symas.com
  Director, Highland Sun     http://highlandsun.com/hyc/
  Chief Architect, OpenLDAP  http://www.openldap.org/project/