From: Daniel Drake <dsd@laptop.org>
Date: Wed, 14 Mar 2012 22:34:33 +0000 (+0000)
Subject: libertas: remove dump_survey implementation
X-Git-Tag: v3.12-rc1~3664^2~48^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=377526578f2c343ea281a918b18ece1fca65005c;p=kernel%2Fkernel-generic.git

libertas: remove dump_survey implementation

libertas provides a dump_survey implementation based on reading of
a RSSI value. However, this RSSI value is calculated based on the
last received beacon from the associated AP - it is not a good
way of surveying a channel in general, and even causes an error
if the card is not associated to a network.

As this is not appropriate as a survey, remove it. This fixes an
issue where something in userspace is repeatedly calling site-survey
during boot, resulting in many repeated errors as the RSSI value cannot
be read before associating.

Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/libertas/cfg.c b/drivers/net/wireless/libertas/cfg.c
index a7cd311..3fa1ece 100644
--- a/drivers/net/wireless/libertas/cfg.c
+++ b/drivers/net/wireless/libertas/cfg.c
@@ -1631,42 +1631,6 @@ static int lbs_cfg_get_station(struct wiphy *wiphy, struct net_device *dev,
 
 
 /*
- * "Site survey", here just current channel and noise level
- */
-
-static int lbs_get_survey(struct wiphy *wiphy, struct net_device *dev,
-	int idx, struct survey_info *survey)
-{
-	struct lbs_private *priv = wiphy_priv(wiphy);
-	s8 signal, noise;
-	int ret;
-
-	if (dev == priv->mesh_dev)
-		return -EOPNOTSUPP;
-
-	if (idx != 0)
-		ret = -ENOENT;
-
-	lbs_deb_enter(LBS_DEB_CFG80211);
-
-	survey->channel = ieee80211_get_channel(wiphy,
-		ieee80211_channel_to_frequency(priv->channel,
-					       IEEE80211_BAND_2GHZ));
-
-	ret = lbs_get_rssi(priv, &signal, &noise);
-	if (ret == 0) {
-		survey->filled = SURVEY_INFO_NOISE_DBM;
-		survey->noise = noise;
-	}
-
-	lbs_deb_leave_args(LBS_DEB_CFG80211, "ret %d", ret);
-	return ret;
-}
-
-
-
-
-/*
  * Change interface
  */
 
@@ -2068,7 +2032,6 @@ static struct cfg80211_ops lbs_cfg80211_ops = {
 	.del_key = lbs_cfg_del_key,
 	.set_default_key = lbs_cfg_set_default_key,
 	.get_station = lbs_cfg_get_station,
-	.dump_survey = lbs_get_survey,
 	.change_virtual_intf = lbs_change_intf,
 	.join_ibss = lbs_join_ibss,
 	.leave_ibss = lbs_leave_ibss,