mac80211: set HT channel before association

Changing the channel type during operation is
confusing to some drivers and will be hard to
handle in multi-channel scenarios. Instead of
changing the channel, set it to the right HT
channel before authenticating/associating and
don't change it -- just update the 20/40 MHz
restrictions in rate control as needed when
changed by the AP.

This also fixes a problem that Paul missed in
his fix for the "regulatory makes us deaf"
issue -- when we couldn't use 40 MHz we still
associated saying we were using 40 MHz, which
could in similarly broken APs make us never
even connect successfully.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 7 deletions

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 54f5b5b299d5..a67ba7c85a1e 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -379,6 +379,7 @@ enum ieee80211_sta_flags {
         IEEE80211_STA_UAPSD_ENABLED     = BIT(7),
         IEEE80211_STA_NULLFUNC_ACKED    = BIT(8),
         IEEE80211_STA_RESET_SIGNAL_AVE  = BIT(9),
+        IEEE80211_STA_DISABLE_40MHZ     = BIT(10),
 };
 
 struct ieee80211_mgd_auth_data {
@@ -511,6 +512,8 @@ struct ieee80211_if_managed {
         int rssi_min_thold, rssi_max_thold;
         int last_ave_beacon_signal;
 
+        enum nl80211_channel_type tx_chantype;
+
         struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
         struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
 };
@@ -667,12 +670,6 @@ struct ieee80211_sub_if_data {
 
         char name[IFNAMSIZ];
 
-        /*
-         * keep track of whether the HT opmode (stored in
-         * vif.bss_info.ht_operation_mode) is valid.
-         */
-        bool ht_opmode_valid;
-
         /* to detect idle changes */
         bool old_idle;
 
@@ -1300,7 +1297,6 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
                                        struct net_device *dev);
 
 /* HT */
-bool ieee80111_cfg_override_disables_ht40(struct ieee80211_sub_if_data *sdata);
 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
                                      struct ieee80211_sta_ht_cap *ht_cap);
 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,