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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>
This commit is contained in:
Daniel Drake 2012-03-14 22:34:33 +00:00 committed by John W. Linville
parent 783b732ac6
commit 377526578f
1 changed files with 0 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
drivers/net/wireless/libertas/cfg.c
View File

@ -1630,42 +1630,6 @@ 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 * Change interface
*/ */
@ -2068,7 +2032,6 @@ static struct cfg80211_ops lbs_cfg80211_ops = {
.del_key = lbs_cfg_del_key, .del_key = lbs_cfg_del_key,
.set_default_key = lbs_cfg_set_default_key, .set_default_key = lbs_cfg_set_default_key,
.get_station = lbs_cfg_get_station, .get_station = lbs_cfg_get_station,
.dump_survey = lbs_get_survey,
.change_virtual_intf = lbs_change_intf, .change_virtual_intf = lbs_change_intf,
.join_ibss = lbs_join_ibss, .join_ibss = lbs_join_ibss,
.leave_ibss = lbs_leave_ibss, .leave_ibss = lbs_leave_ibss,