wifi: mac80211: simplify HE/EHT element length functions

We don't need to pass the iftype there, we already have it
in the sdata. Simplify this code.

Link: https://msgid.link/20240129202041.5890eb1d4184.Ibce7e5abcc7887630da03ac2263d8004ec541418@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/ieee80211_i.h

@@ -2502,7 +2502,7 @@ u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
 			       u32 cap);
 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
 				const struct cfg80211_chan_def *chandef);
-u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype);
+u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata);
 u8 *ieee80211_ie_build_he_cap(const struct ieee80211_conn_settings *conn,
 			      const struct ieee80211_sta_he_cap *he_cap,
 			      u8 *pos, u8 *end);
@@ -2651,7 +2651,7 @@ u32 ieee80211_calc_expected_tx_airtime(struct ieee80211_hw *hw,
 void ieee80211_init_frag_cache(struct ieee80211_fragment_cache *cache);
 void ieee80211_destroy_frag_cache(struct ieee80211_fragment_cache *cache);
 
-u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype);
+u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata);
 u8 *ieee80211_ie_build_eht_cap(u8 *pos,
 			       const struct ieee80211_sta_he_cap *he_cap,
 			       const struct ieee80211_sta_eht_cap *eht_cap,

net/mac80211/mesh.c

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2008, 2009 open80211s Ltd.
- * Copyright (C) 2018 - 2023 Intel Corporation
+ * Copyright (C) 2018 - 2024 Intel Corporation
  * Authors:    Luis Carlos Cobo <luisca@cozybit.com>
  * 	       Javier Cardona <javier@cozybit.com>
  */
@@ -981,10 +981,8 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
 	band = chanctx_conf->def.chan->band;
 	rcu_read_unlock();
 
-	ie_len_he_cap = ieee80211_ie_len_he_cap(sdata,
-						NL80211_IFTYPE_MESH_POINT);
-	ie_len_eht_cap = ieee80211_ie_len_eht_cap(sdata,
-						  NL80211_IFTYPE_MESH_POINT);
+	ie_len_he_cap = ieee80211_ie_len_he_cap(sdata);
+	ie_len_eht_cap = ieee80211_ie_len_eht_cap(sdata);
 	head_len = hdr_len +
 		   2 + /* NULL SSID */
 		   /* Channel Switch Announcement */

net/mac80211/mesh_plink.c

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2008, 2009 open80211s Ltd.
- * Copyright (C) 2019, 2021-2023 Intel Corporation
+ * Copyright (C) 2019, 2021-2024 Intel Corporation
  * Author:     Luis Carlos Cobo <luisca@cozybit.com>
  */
 #include <linux/gfp.h>
@@ -226,10 +226,8 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
 	int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.self_prot);
 	int err = -ENOMEM;
 
-	ie_len_he_cap = ieee80211_ie_len_he_cap(sdata,
-						NL80211_IFTYPE_MESH_POINT);
-	ie_len_eht_cap = ieee80211_ie_len_eht_cap(sdata,
-						  NL80211_IFTYPE_MESH_POINT);
+	ie_len_he_cap = ieee80211_ie_len_he_cap(sdata);
+	ie_len_eht_cap = ieee80211_ie_len_eht_cap(sdata);
 	skb = dev_alloc_skb(local->tx_headroom +
 			    hdr_len +
 			    2 + /* capability info */

net/mac80211/util.c

@@ -3272,7 +3272,8 @@ u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
 	return pos;
 }
 
-u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
+/* this may return more than ieee80211_ie_build_he_cap() will need */
+u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata)
 {
 	const struct ieee80211_sta_he_cap *he_cap;
 	struct ieee80211_supported_band *sband;
@@ -3282,7 +3283,7 @@ u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
 	if (!sband)
 		return 0;
 
-	he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
+	he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
 	if (!he_cap)
 		return 0;
 
@@ -5065,7 +5066,8 @@ u16 ieee80211_encode_usf(int listen_interval)
 	return (u16) listen_interval;
 }
 
-u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
+/* this may return more than ieee80211_ie_build_eht_cap() will need */
+u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata)
 {
 	const struct ieee80211_sta_he_cap *he_cap;
 	const struct ieee80211_sta_eht_cap *eht_cap;
@@ -5077,13 +5079,12 @@ u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
 	if (!sband)
 		return 0;
 
-	he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
-	eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype);
+	he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
+	eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
 	if (!he_cap || !eht_cap)
 		return 0;
 
-	is_ap = iftype == NL80211_IFTYPE_AP ||
-		iftype == NL80211_IFTYPE_P2P_GO;
+	is_ap = sdata->vif.type == NL80211_IFTYPE_AP;
 
 	n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
 				       &eht_cap->eht_cap_elem,