package/kernel/mac80211/patches/570-restrict_dfs_regions.patch

   1 --- a/drivers/net/wireless/ath/ath10k/mac.c
   2 +++ b/drivers/net/wireless/ath/ath10k/mac.c
   3 @@ -4321,6 +4321,7 @@ static const struct ieee80211_iface_comb
   4                                         BIT(NL80211_CHAN_WIDTH_20) |
   5                                         BIT(NL80211_CHAN_WIDTH_40) |
   6                                         BIT(NL80211_CHAN_WIDTH_80),
   7 +               .radar_detect_regions = BIT(NL80211_DFS_ETSI),
   8  #endif
   9         },
  10  };
  11 --- a/drivers/net/wireless/ath/ath9k/init.c
  12 +++ b/drivers/net/wireless/ath/ath9k/init.c
  13 @@ -688,6 +688,7 @@ static const struct ieee80211_iface_comb
  14                 .beacon_int_infra_match = true,
  15                 .radar_detect_widths =  BIT(NL80211_CHAN_WIDTH_20_NOHT) |
  16                                         BIT(NL80211_CHAN_WIDTH_20),
  17 +               .radar_detect_regions = BIT(NL80211_DFS_ETSI),
  18         }
  19  #endif
  20  };
  21 --- a/include/net/cfg80211.h
  22 +++ b/include/net/cfg80211.h
  23 @@ -2620,6 +2620,7 @@ struct ieee80211_iface_limit {
  24   *     between infrastructure and AP types must match. This is required
  25   *     only in special cases.
  26   * @radar_detect_widths: bitmap of channel widths supported for radar detection
  27 + * @radar_detect_regions: bitmap of regions supported for radar detection
  28   *
  29   * With this structure the driver can describe which interface
  30   * combinations it supports concurrently.
  31 @@ -2677,6 +2678,7 @@ struct ieee80211_iface_combination {
  32         u8 n_limits;
  33         bool beacon_int_infra_match;
  34         u8 radar_detect_widths;
  35 +       u8 radar_detect_regions;
  36  };
  37
  38  struct ieee80211_txrx_stypes {
  39 --- a/net/wireless/util.c
  40 +++ b/net/wireless/util.c
  41 @@ -1259,6 +1259,7 @@ int cfg80211_can_use_iftype_chan(struct
  42                                  enum cfg80211_chan_mode chanmode,
  43                                  u8 radar_detect)
  44  {
  45 +       const struct ieee80211_regdomain *regdom;
  46         struct wireless_dev *wdev_iter;
  47         u32 used_iftypes = BIT(iftype);
  48         int num[NUM_NL80211_IFTYPES];
  49 @@ -1267,6 +1268,7 @@ int cfg80211_can_use_iftype_chan(struct
  50         struct ieee80211_channel *ch;
  51         enum cfg80211_chan_mode chmode;
  52         int num_different_channels = 0;
  53 +       enum nl80211_dfs_regions region = 0;
  54         int total = 1;
  55         int i, j;
  56
  57 @@ -1285,6 +1287,14 @@ int cfg80211_can_use_iftype_chan(struct
  58                 return 0;
  59         }
  60
  61 +       if (radar_detect) {
  62 +               rcu_read_lock();
  63 +               regdom = rcu_dereference(cfg80211_regdomain);
  64 +               if (regdom)
  65 +                       region = regdom->dfs_region;
  66 +               rcu_read_unlock();
  67 +       }
  68 +
  69         memset(num, 0, sizeof(num));
  70         memset(used_channels, 0, sizeof(used_channels));
  71
  72 @@ -1392,6 +1402,10 @@ int cfg80211_can_use_iftype_chan(struct
  73                 if (radar_detect && !(c->radar_detect_widths & radar_detect))
  74                         goto cont;
  75
  76 +               if (radar_detect && c->radar_detect_regions &&
  77 +                   !(c->radar_detect_regions & BIT(region)))
  78 +                       goto cont;
  79 +
  80                 /*
  81                  * Finally check that all iftypes that we're currently
  82                  * using are actually part of this combination. If they