mac80211/minstrel_ht: fix cck rate sampling
Felix Fietkau [Fri, 28 Jun 2013 19:04:35 +0000 (21:04 +0200)]
commit 1cd158573951f737fbc878a35cb5eb47bf9af3d5 upstream.

The CCK group needs special treatment to set the right flags and rate
index. Add this missing check to prevent setting broken rates for tx
packets.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

net/mac80211/rc80211_minstrel_ht.c

index 5b2d301..f5aed96 100644 (file)
@@ -804,10 +804,18 @@ minstrel_ht_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
 
        sample_group = &minstrel_mcs_groups[sample_idx / MCS_GROUP_RATES];
        info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
+       rate->count = 1;
+
+       if (sample_idx / MCS_GROUP_RATES == MINSTREL_CCK_GROUP) {
+               int idx = sample_idx % ARRAY_SIZE(mp->cck_rates);
+               rate->idx = mp->cck_rates[idx];
+               rate->flags = 0;
+               return;
+       }
+
        rate->idx = sample_idx % MCS_GROUP_RATES +
                    (sample_group->streams - 1) * MCS_GROUP_RATES;
        rate->flags = IEEE80211_TX_RC_MCS | sample_group->flags;
-       rate->count = 1;
 }
 
 static void