From b097ad29752f909ec1121ac3dc57d348f08dd8d7 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 20 Apr 2009 14:36:57 -0700 Subject: [PATCH] iwlwifi: support truly passive scanning If passive scanning is requested we should not ask the microcode to do active scanning after detecting traffic on a channel -- that should only be used when an active scan is requested but some channels are marked passive. Signed-off-by: Johannes Berg Signed-off-by: Reinette Chatre Signed-off-by: John W. Linville --- drivers/net/wireless/iwlwifi/iwl-scan.c | 7 ++++++- drivers/net/wireless/iwlwifi/iwl3945-base.c | 7 ++++++- 2 files changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/iwl-scan.c b/drivers/net/wireless/iwlwifi/iwl-scan.c index 9edcf8c..25311e1c 100644 --- a/drivers/net/wireless/iwlwifi/iwl-scan.c +++ b/drivers/net/wireless/iwlwifi/iwl-scan.c @@ -712,7 +712,12 @@ static void iwl_bg_request_scan(struct work_struct *data) } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) { band = IEEE80211_BAND_5GHZ; rate = IWL_RATE_6M_PLCP; - scan->good_CRC_th = IWL_GOOD_CRC_TH; + /* + * If active scaning is requested but a certain channel + * is marked passive, we can do active scanning if we + * detect transmissions. + */ + scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0; /* Force use of chains B and C (0x6) for scan Rx for 4965 * Avoid A (0x1) because of its off-channel reception on A-band. diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c index 4df9b4b..c15d0cf 100644 --- a/drivers/net/wireless/iwlwifi/iwl3945-base.c +++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c @@ -3078,7 +3078,12 @@ static void iwl3945_bg_request_scan(struct work_struct *data) band = IEEE80211_BAND_2GHZ; } else if (priv->scan_bands & BIT(IEEE80211_BAND_5GHZ)) { scan->tx_cmd.rate = IWL_RATE_6M_PLCP; - scan->good_CRC_th = IWL_GOOD_CRC_TH; + /* + * If active scaning is requested but a certain channel + * is marked passive, we can do active scanning if we + * detect transmissions. + */ + scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH : 0; band = IEEE80211_BAND_5GHZ; } else { IWL_WARN(priv, "Invalid scan band count\n"); -- 2.7.4