mac80211: do not allow HT/VHT IEs in 6 GHz mesh mode

As HT/VHT elements are not allowed in 6 GHz band, do not include
them in mesh beacon template formation.
Signed-off-by: Rajkumar Manoharan <rmanohar@codeaurora.org>
Link: https://lore.kernel.org/r/1589399105-25472-9-git-send-email-rmanohar@codeaurora.org
Link: https://lore.kernel.org/r/20200528193455.76796-2-johannes@sipsolutions.netSigned-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/mesh.c

@@ -415,6 +415,10 @@ int mesh_add_ht_cap_ie(struct ieee80211_sub_if_data *sdata,
 	if (!sband)
 		return -EINVAL;
 
+	/* HT not allowed in 6 GHz */
+	if (sband->band == NL80211_BAND_6GHZ)
+		return 0;
+
 	if (!sband->ht_cap.ht_supported ||
 	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
 	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
@@ -452,6 +456,10 @@ int mesh_add_ht_oper_ie(struct ieee80211_sub_if_data *sdata,
 	sband = local->hw.wiphy->bands[channel->band];
 	ht_cap = &sband->ht_cap;
 
+	/* HT not allowed in 6 GHz */
+	if (sband->band == NL80211_BAND_6GHZ)
+		return 0;
+
 	if (!ht_cap->ht_supported ||
 	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
 	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
@@ -479,6 +487,10 @@ int mesh_add_vht_cap_ie(struct ieee80211_sub_if_data *sdata,
 	if (!sband)
 		return -EINVAL;
 
+	/* VHT not allowed in 6 GHz */
+	if (sband->band == NL80211_BAND_6GHZ)
+		return 0;
+
 	if (!sband->vht_cap.vht_supported ||
 	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
 	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||
@@ -516,6 +528,10 @@ int mesh_add_vht_oper_ie(struct ieee80211_sub_if_data *sdata,
 	sband = local->hw.wiphy->bands[channel->band];
 	vht_cap = &sband->vht_cap;
 
+	/* VHT not allowed in 6 GHz */
+	if (sband->band == NL80211_BAND_6GHZ)
+		return 0;
+
 	if (!vht_cap->vht_supported ||
 	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT ||
 	    sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_5 ||