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ath9k: fix counter overflow in survey channel time stats for the operating channel 

SVN-Revision: 23381
lede-17.01
Felix Fietkau 2010-10-10 16:22:59 +00:00
parent 80a79d3910
commit c5b740d8a3
1 changed files with 33 additions and 15 deletions
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48
package/mac80211/patches/526-ath9k_survey_channel_stats.patch
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@ -11,7 +11,7 @@
struct tasklet_struct bcon_tasklet;
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -176,6 +176,49 @@ static void ath_start_ani(struct ath_com
@@ -176,6 +176,44 @@ static void ath_start_ani(struct ath_com
msecs_to_jiffies((u32)ah->config.ani_poll_interval));
}
@ -34,11 +34,8 @@
+ int pos = ah->curchan - &ah->channels[0];
+ struct survey_info *survey = &sc->survey[pos];
+ struct ath_cycle_counters *cc = &common->cc_survey;
+ unsigned long flags;
+ unsigned int div = common->clockrate * 1000;
+
+ spin_lock_irqsave(&common->cc_lock, flags);
+
+ ath_hw_cycle_counters_update(common);
+
+ if (cc->cycles > 0) {
@ -54,14 +51,20 @@
+ memset(cc, 0, sizeof(*cc));
+
+ ath_update_survey_nf(sc, pos);
+
+ spin_unlock_irqrestore(&common->cc_lock, flags);
+}
+
/*
* Set/change channels. If the channel is really being changed, it's done
* by reseting the chip. To accomplish this we must first cleanup any pending
@@ -1533,7 +1576,8 @@ static int ath9k_config(struct ieee80211
@@ -454,6 +492,7 @@ void ath_ani_calibrate(unsigned long dat
if (aniflag) {
spin_lock_irqsave(&common->cc_lock, flags);
ath9k_hw_ani_monitor(ah, ah->curchan);
+ ath_update_survey_stats(sc);
spin_unlock_irqrestore(&common->cc_lock, flags);
}
@@ -1533,7 +1572,8 @@ static int ath9k_config(struct ieee80211
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
@ -71,23 +74,26 @@
struct ieee80211_conf *conf = &hw->conf;
bool disable_radio;
@@ -1599,6 +1643,10 @@ static int ath9k_config(struct ieee80211
@@ -1599,6 +1639,11 @@ static int ath9k_config(struct ieee80211
if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
struct ieee80211_channel *curchan = hw->conf.channel;
int pos = curchan->hw_value;
+ int old_pos = -1;
+ unsigned long flags;
+
+ if (ah->curchan)
+ old_pos = ah->curchan - &ah->channels[0];
aphy->chan_idx = pos;
aphy->chan_is_ht = conf_is_ht(conf);
@@ -1626,12 +1674,43 @@ static int ath9k_config(struct ieee80211
@@ -1626,12 +1671,45 @@ static int ath9k_config(struct ieee80211
ath_update_chainmask(sc, conf_is_ht(conf));
+ /* update survey stats for the old channel before switching */
+ spin_lock_irqsave(&common->cc_lock, flags);
+ ath_update_survey_stats(sc);
+ spin_unlock_irqrestore(&common->cc_lock, flags);
+
+ /*
+ * If the operating channel changes, change the survey in-use flags
@ -126,25 +132,31 @@
}
skip_chan_change:
@@ -2001,9 +2080,12 @@ static int ath9k_get_survey(struct ieee8
@@ -2001,9 +2079,15 @@ static int ath9k_get_survey(struct ieee8
{
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(sc->sc_ah);
struct ieee80211_supported_band *sband;
- struct ath9k_channel *chan;
+ struct ieee80211_channel *chan;
+ unsigned long flags;
+ int pos;
+
+ spin_lock_irqsave(&common->cc_lock, flags);
+ if (idx == 0)
+ ath_update_survey_stats(sc);
sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
if (sband && idx >= sband->n_channels) {
@@ -2017,17 +2099,10 @@ static int ath9k_get_survey(struct ieee8
if (!sband || idx >= sband->n_channels)
return -ENOENT;
@@ -2014,21 +2098,17 @@ static int ath9k_get_survey(struct ieee8
if (!sband)
sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
- if (!sband || idx >= sband->n_channels)
- return -ENOENT;
-
- survey->channel = &sband->channels[idx];
- chan = &ah->channels[survey->channel->hw_value];
- survey->filled = 0;
@ -155,11 +167,17 @@
- if (chan->noisefloor) {
- survey->filled |= SURVEY_INFO_NOISE_DBM;
- survey->noise = chan->noisefloor;
- }
+ if (!sband || idx >= sband->n_channels) {
+ spin_unlock_irqrestore(&common->cc_lock, flags);
+ return -ENOENT;
}
+ chan = &sband->channels[idx];
+ pos = chan->hw_value;
+ memcpy(survey, &sc->survey[pos], sizeof(*survey));
+ survey->channel = chan;
+ spin_unlock_irqrestore(&common->cc_lock, flags);
+
return 0;
}