wifi: mac80211: validate some driver features for MLO

If MLO is enabled by the driver then validate a set of
capabilities that mac80211 will initially not support
in MLO. This might change if features are implemented.

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

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 5c71b52..0eaa1f4 100644 (file)
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -955,6 +955,48 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
                    (!local->ops->start_nan || !local->ops->stop_nan)))
                return -EINVAL;
 
+       if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) {
+               /*
+                * For drivers capable of doing MLO, assume modern driver
+                * or firmware facilities, so software doesn't have to do
+                * as much, e.g. monitoring beacons would be hard if we
+                * might not even know which link is active at which time.
+                */
+               if (WARN_ON(!local->use_chanctx))
+                       return -EINVAL;
+
+               if (WARN_ON(!local->ops->link_info_changed))
+                       return -EINVAL;
+
+               if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL)))
+                       return -EINVAL;
+
+               if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION)))
+                       return -EINVAL;
+
+               if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING)))
+                       return -EINVAL;
+
+               if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) &&
+                           !ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS)))
+                       return -EINVAL;
+
+               if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE)))
+                       return -EINVAL;
+
+               if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR)))
+                       return -EINVAL;
+
+               if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC)))
+                       return -EINVAL;
+
+               if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY)))
+                       return -EINVAL;
+
+               if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS)))
+                       return -EINVAL;
+       }
+
 #ifdef CONFIG_PM
        if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
                return -EINVAL;