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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>
This commit is contained in:
Helmut Schaa 2009-06-30 14:49:18 +02:00 committed by John W. Linville
parent 9d49e861a5
commit 96f7e73938
1 changed files with 1 additions and 1 deletions
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2
net/mac80211/scan.c
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@ -26,7 +26,7 @@
#define IEEE80211_PROBE_DELAY (HZ / 33) #define IEEE80211_PROBE_DELAY (HZ / 33)
#define IEEE80211_CHANNEL_TIME (HZ / 33) #define IEEE80211_CHANNEL_TIME (HZ / 33)
#define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5) #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 8)
struct ieee80211_bss * struct ieee80211_bss *
ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq, ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,