package/mac80211/patches/580-mac80211_fix_minstrel_ht_crash.patch

   1 --- a/net/mac80211/rc80211_minstrel_ht.c
   2 +++ b/net/mac80211/rc80211_minstrel_ht.c
   3 @@ -659,18 +659,14 @@ minstrel_ht_update_caps(void *priv, stru
   4         struct ieee80211_mcs_info *mcs = &sta->ht_cap.mcs;
   5         struct ieee80211_local *local = hw_to_local(mp->hw);
   6         u16 sta_cap = sta->ht_cap.cap;
   7 +       int n_supported = 0;
   8         int ack_dur;
   9         int stbc;
  10         int i;
  11
  12         /* fall back to the old minstrel for legacy stations */
  13 -       if (!sta->ht_cap.ht_supported) {
  14 -               msp->is_ht = false;
  15 -               memset(&msp->legacy, 0, sizeof(msp->legacy));
  16 -               msp->legacy.r = msp->ratelist;
  17 -               msp->legacy.sample_table = msp->sample_table;
  18 -               return mac80211_minstrel.rate_init(priv, sband, sta, &msp->legacy);
  19 -       }
  20 +       if (!sta->ht_cap.ht_supported)
  21 +               goto use_legacy;
  22
  23         BUILD_BUG_ON(ARRAY_SIZE(minstrel_mcs_groups) !=
  24                 MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS);
  25 @@ -725,7 +721,22 @@ minstrel_ht_update_caps(void *priv, stru
  26
  27                 mi->groups[i].supported =
  28                         mcs->rx_mask[minstrel_mcs_groups[i].streams - 1];
  29 +
  30 +               if (mi->groups[i].supported)
  31 +                       n_supported++;
  32         }
  33 +
  34 +       if (!n_supported)
  35 +               goto use_legacy;
  36 +
  37 +       return;
  38 +
  39 +use_legacy:
  40 +       msp->is_ht = false;
  41 +       memset(&msp->legacy, 0, sizeof(msp->legacy));
  42 +       msp->legacy.r = msp->ratelist;
  43 +       msp->legacy.sample_table = msp->sample_table;
  44 +       return mac80211_minstrel.rate_init(priv, sband, sta, &msp->legacy);
  45  }
  46
  47  static void