From: Helmut Schaa <helmut.schaa@googlemail.com>
Date: Tue, 30 Jun 2009 12:49:18 +0000 (+0200)
Subject: mac80211: shorten the passive dwell time for sw scans
X-Git-Tag: v2.6.32-rc1~703^2~668
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=96f7e73938da744e718ce4817dd3e7e424624654;p=pandora-kernel.git

mac80211: shorten the passive dwell time for sw scans

mac80211's software scan implementation uses a passive dwell time of
(HZ / 5) which means we stay 200ms on each passive channel. Compared
to iwlwifi's hw scan and the old ipw* drivers which use values around
120ms this is quite long.

Reducing the passive dwell time from 200ms to 125ms should save us
something around a second on cards capable of 11a and we should still be
able to catch beacons from most access points (assuming a ~100ms beacon
interval).

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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