From: Felix Fietkau <nbd@openwrt.org>
Date: Wed, 29 Sep 2010 15:15:28 +0000 (+0200)
Subject: ath9k: do not return default noise floor values via survey
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=4f1a5a4b62c5335aafd5830866320c8918103a3a;p=openwrt%2Fstaging%2Fblogic.git

ath9k: do not return default noise floor values via survey

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index a13387882636..fcba402d5a1e 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -2004,15 +2004,17 @@ static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
 	struct ath_wiphy *aphy = hw->priv;
 	struct ath_softc *sc = aphy->sc;
 	struct ath_hw *ah = sc->sc_ah;
-	struct ath_common *common = ath9k_hw_common(ah);
 	struct ieee80211_conf *conf = &hw->conf;
 
 	 if (idx != 0)
 		return -ENOENT;
 
 	survey->channel = conf->channel;
-	survey->filled = SURVEY_INFO_NOISE_DBM;
-	survey->noise = common->ani.noise_floor;
+	survey->filled = 0;
+	if (ah->curchan && ah->curchan->noisefloor) {
+		survey->filled |= SURVEY_INFO_NOISE_DBM;
+		survey->noise = ah->curchan->noisefloor;
+	}
 
 	return 0;
 }