From b23b025fe246f3acc2988eb6d400df34c27cb8ae Mon Sep 17 00:00:00 2001 From: Ben Greear Date: Fri, 4 Feb 2011 11:54:17 -0800 Subject: mac80211: Optimize scans on current operating channel. This should decrease un-necessary flushes, on/off channel work, and channel changes in cases where the only scanned channel is the current operating channel. * Removes SCAN_OFF_CHANNEL flag, uses SDATA_STATE_OFFCHANNEL and is-scanning flags instead. * Add helper method to determine if we are currently configured for the operating channel. * Do no blindly go off/on channel in work.c Instead, only call appropriate on/off code when we really need to change channels. Always enable offchannel-ps mode when starting work, and disable it when we are done. * Consolidate ieee80211_offchannel_stop_station and ieee80211_offchannel_stop_beaconing, call it ieee80211_offchannel_stop_vifs instead. * Accept non-beacon frames when scanning on operating channel. * Scan state machine optimized to minimize on/off channel transitions. Also, when going on-channel, go ahead and re-enable beaconing. We're going to be there for 200ms, so seems like some useful beaconing could happen. Always enable offchannel-ps mode when starting software scan, and disable it when we are done. * Grab local->mtx earlier in __ieee80211_scan_completed_finish so that we are protected when calling hw_config(), etc. * Pass probe-responses up the stack if scanning on local channel, so that mlme can take a look. Signed-off-by: Ben Greear Signed-off-by: John W. Linville --- net/mac80211/rx.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) (limited to 'net/mac80211/rx.c') diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 753ffc41c1aa..b5f59ed24000 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -409,16 +409,10 @@ ieee80211_rx_h_passive_scan(struct ieee80211_rx_data *rx) if (likely(!(status->rx_flags & IEEE80211_RX_IN_SCAN))) return RX_CONTINUE; - if (test_bit(SCAN_HW_SCANNING, &local->scanning)) + if (test_bit(SCAN_HW_SCANNING, &local->scanning) || + test_bit(SCAN_SW_SCANNING, &local->scanning)) return ieee80211_scan_rx(rx->sdata, skb); - if (test_bit(SCAN_SW_SCANNING, &local->scanning)) { - /* drop all the other packets during a software scan anyway */ - if (ieee80211_scan_rx(rx->sdata, skb) != RX_QUEUED) - dev_kfree_skb(skb); - return RX_QUEUED; - } - /* scanning finished during invoking of handlers */ I802_DEBUG_INC(local->rx_handlers_drop_passive_scan); return RX_DROP_UNUSABLE; @@ -2793,7 +2787,7 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, local->dot11ReceivedFragmentCount++; if (unlikely(test_bit(SCAN_HW_SCANNING, &local->scanning) || - test_bit(SCAN_OFF_CHANNEL, &local->scanning))) + test_bit(SCAN_SW_SCANNING, &local->scanning))) status->rx_flags |= IEEE80211_RX_IN_SCAN; if (ieee80211_is_mgmt(fc)) -- cgit v1.2.3