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mac80211: minstrel_ht: pick only supported rates for sta and group max*rates 

minstrel_ht initializes max_tp_rate max_tp_rate2 and max_prob_rate to
zero both for minstrel_ht_sta and minstrel_mcs_group_data.
This is wrong since there is no guarantee that the 1st rate of any
group is supported.

Signed-off-by: Karl Beldan <karl.beldan@rivierawaves.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Karl Beldan 2013-04-18 14:26:20 +02:00 committed by Johannes Berg
parent 06f95e66de
commit c2eb5b0f34
1 changed files with 15 additions and 6 deletions
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21
net/mac80211/rc80211_minstrel_ht.c
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@ -244,6 +244,7 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
struct minstrel_rate_stats *mr;
int cur_prob, cur_prob_tp, cur_tp, cur_tp2;
int group, i, index;
bool mi_rates_valid = false;
if (mi->ampdu_packets > 0) {
mi->avg_ampdu_len = minstrel_ewma(mi->avg_ampdu_len,
@ -254,11 +255,10 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
mi->sample_slow = 0;
mi->sample_count = 0;
mi->max_tp_rate = 0;
mi->max_tp_rate2 = 0;
mi->max_prob_rate = 0;
for (group = 0; group < ARRAY_SIZE(minstrel_mcs_groups); group++) {
bool mg_rates_valid = false;
cur_prob = 0;
cur_prob_tp = 0;
cur_tp = 0;
@ -268,15 +268,24 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
if (!mg->supported)
continue;
mg->max_tp_rate = 0;
mg->max_tp_rate2 = 0;
mg->max_prob_rate = 0;
mi->sample_count++;
for (i = 0; i < MCS_GROUP_RATES; i++) {
if (!(mg->supported & BIT(i)))
continue;
/* initialize rates selections starting indexes */
if (!mg_rates_valid) {
mg->max_tp_rate = mg->max_tp_rate2 =
mg->max_prob_rate = i;
if (!mi_rates_valid) {
mi->max_tp_rate = mi->max_tp_rate2 =
mi->max_prob_rate = i;
mi_rates_valid = true;
}
mg_rates_valid = true;
}
mr = &mg->rates[i];
mr->retry_updated = false;
index = MCS_GROUP_RATES * group + i;