The call to ieee80211_hw_config() is supposed to apply changes synchronously, so once it returns the parameters are applied to the hardware. Thus, there really is no need to delay the probing by the channel switch time again since the channel switch has already happened once we get to this code. This cuts scanning time from over 7 seconds to about 4 on ar9170, which is due to the number of channels scanned and ar9170's switch time being advertised as 135ms (my test now indicates it is about 77ms with the current driver, but the difference might also be due to using a different machine with different USB controllers). Signed-off-by: Johannes Berg <johannes@xxxxxxxxxxxxxxxx> --- net/mac80211/scan.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- wireless-testing.orig/net/mac80211/scan.c 2009-05-08 12:45:38.000000000 +0200 +++ wireless-testing/net/mac80211/scan.c 2009-05-08 12:59:53.000000000 +0200 @@ -559,8 +559,7 @@ void ieee80211_scan_work(struct work_str if (skip) break; - next_delay = IEEE80211_PROBE_DELAY + - usecs_to_jiffies(local->hw.channel_change_time); + next_delay = IEEE80211_PROBE_DELAY; local->scan_state = SCAN_SEND_PROBE; break; case SCAN_SEND_PROBE: -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
