mac80211: Support dynamic AP mode channel width changes

Implement the new cfg80211 capability to enable mac80211-based drivers
to support for dynamic channel bandwidth changes (e.g., HT 20/40 MHz
changes).

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 4d15a1566cd5..7b8d3cf89574 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -3958,6 +3958,21 @@ static int ieee80211_set_qos_map(struct wiphy *wiphy,
         return 0;
 }
 
+static int ieee80211_set_ap_chanwidth(struct wiphy *wiphy,
+                                      struct net_device *dev,
+                                      struct cfg80211_chan_def *chandef)
+{
+        struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+        int ret;
+        u32 changed = 0;
+
+        ret = ieee80211_vif_change_bandwidth(sdata, chandef, &changed);
+        if (ret == 0)
+                ieee80211_bss_info_change_notify(sdata, changed);
+
+        return ret;
+}
+
 const struct cfg80211_ops mac80211_config_ops = {
         .add_virtual_intf = ieee80211_add_iface,
         .del_virtual_intf = ieee80211_del_iface,
@@ -4038,4 +4053,5 @@ const struct cfg80211_ops mac80211_config_ops = {
         .start_radar_detection = ieee80211_start_radar_detection,
         .channel_switch = ieee80211_channel_switch,
         .set_qos_map = ieee80211_set_qos_map,
+        .set_ap_chanwidth = ieee80211_set_ap_chanwidth,
 };