mac80211: convert to channel definition struct

Convert mac80211 (and where necessary, some drivers a
little bit) to the new channel definition struct.

This will allow extending mac80211 for VHT, which is
currently restricted to channel contexts since there
are no drivers using that which makes it easier. As
I also don't care about VHT for drivers not using the
channel context API, I won't convert the previous API
to VHT support.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 16 insertions, 5 deletions

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index b229cded4567..6e933409979a 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -798,10 +798,9 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
                         local->_oper_channel = &sband->channels[0];
                         local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
                 }
-                if (!local->monitor_channel) {
-                        local->monitor_channel = &sband->channels[0];
-                        local->monitor_channel_type = NL80211_CHAN_NO_HT;
-                }
+                cfg80211_chandef_create(&local->monitor_chandef,
+                                        &sband->channels[0],
+                                        NL80211_CHAN_NO_HT);
                 channels += sband->n_channels;
 
                 if (max_bitrates < sband->n_bitrates)
@@ -884,10 +883,22 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
         if (supp_ht)
                 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
 
-        if (supp_vht)
+        if (supp_vht) {
                 local->scan_ies_len +=
                         2 + sizeof(struct ieee80211_vht_cap);
 
+                /*
+                 * (for now at least), drivers wanting to use VHT must
+                 * support channel contexts, as they contain all the
+                 * necessary VHT information and the global hw config
+                 * doesn't (yet)
+                 */
+                if (WARN_ON(!local->use_chanctx)) {
+                        result = -EINVAL;
+                        goto fail_wiphy_register;
+                }
+        }
+
         if (!local->ops->hw_scan) {
                 /* For hw_scan, driver needs to set these up. */
                 local->hw.wiphy->max_scan_ssids = 4;