Release 4.11 net/mac80211/chan.c

/*
 * mac80211 - channel management
 */

#include <linux/nl80211.h>
#include <linux/export.h>
#include <linux/rtnetlink.h>
#include <net/cfg80211.h>
#include "ieee80211_i.h"
#include "driver-ops.h"



static int ieee80211_chanctx_num_assigned(struct ieee80211_local *local,
					  struct ieee80211_chanctx *ctx)
{
	struct ieee80211_sub_if_data *sdata;
	int num = 0;

	lockdep_assert_held(&local->chanctx_mtx);

	list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
		num++;

	return num;
}

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static int ieee80211_chanctx_num_reserved(struct ieee80211_local *local,
					  struct ieee80211_chanctx *ctx)
{
	struct ieee80211_sub_if_data *sdata;
	int num = 0;

	lockdep_assert_held(&local->chanctx_mtx);

	list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
		num++;

	return num;
}

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int ieee80211_chanctx_refcount(struct ieee80211_local *local,
			       struct ieee80211_chanctx *ctx)
{
	return ieee80211_chanctx_num_assigned(local, ctx) +
	       ieee80211_chanctx_num_reserved(local, ctx);
}

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static int ieee80211_num_chanctx(struct ieee80211_local *local)
{
	struct ieee80211_chanctx *ctx;
	int num = 0;

	lockdep_assert_held(&local->chanctx_mtx);

	list_for_each_entry(ctx, &local->chanctx_list, list)
		num++;

	return num;
}

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static bool ieee80211_can_create_new_chanctx(struct ieee80211_local *local)
{
	lockdep_assert_held(&local->chanctx_mtx);
	return ieee80211_num_chanctx(local) < ieee80211_max_num_channels(local);
}

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static struct ieee80211_chanctx *

ieee80211_vif_get_chanctx(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_local *local __maybe_unused = sdata->local;
	struct ieee80211_chanctx_conf *conf;

	conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
					 lockdep_is_held(&local->chanctx_mtx));
	if (!conf)
		return NULL;

	return container_of(conf, struct ieee80211_chanctx, conf);
}

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static const struct cfg80211_chan_def *

ieee80211_chanctx_reserved_chandef(struct ieee80211_local *local,
				   struct ieee80211_chanctx *ctx,
				   const struct cfg80211_chan_def *compat)
{
	struct ieee80211_sub_if_data *sdata;

	lockdep_assert_held(&local->chanctx_mtx);

	list_for_each_entry(sdata, &ctx->reserved_vifs,
			    reserved_chanctx_list) {
		if (!compat)
			compat = &sdata->reserved_chandef;

		compat = cfg80211_chandef_compatible(&sdata->reserved_chandef,
						     compat);
		if (!compat)
			break;
	}

	return compat;
}

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static const struct cfg80211_chan_def *

ieee80211_chanctx_non_reserved_chandef(struct ieee80211_local *local,
				       struct ieee80211_chanctx *ctx,
				       const struct cfg80211_chan_def *compat)
{
	struct ieee80211_sub_if_data *sdata;

	lockdep_assert_held(&local->chanctx_mtx);

	list_for_each_entry(sdata, &ctx->assigned_vifs,
			    assigned_chanctx_list) {
		if (sdata->reserved_chanctx != NULL)
			continue;

		if (!compat)
			compat = &sdata->vif.bss_conf.chandef;

		compat = cfg80211_chandef_compatible(
				&sdata->vif.bss_conf.chandef, compat);
		if (!compat)
			break;
	}

	return compat;
}

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static const struct cfg80211_chan_def *

ieee80211_chanctx_combined_chandef(struct ieee80211_local *local,
				   struct ieee80211_chanctx *ctx,
				   const struct cfg80211_chan_def *compat)
{
	lockdep_assert_held(&local->chanctx_mtx);

	compat = ieee80211_chanctx_reserved_chandef(local, ctx, compat);
	if (!compat)
		return NULL;

	compat = ieee80211_chanctx_non_reserved_chandef(local, ctx, compat);
	if (!compat)
		return NULL;

	return compat;
}

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static bool

ieee80211_chanctx_can_reserve_chandef(struct ieee80211_local *local,
				      struct ieee80211_chanctx *ctx,
				      const struct cfg80211_chan_def *def)
{
	lockdep_assert_held(&local->chanctx_mtx);

	if (ieee80211_chanctx_combined_chandef(local, ctx, def))
		return true;

	if (!list_empty(&ctx->reserved_vifs) &&
	    ieee80211_chanctx_reserved_chandef(local, ctx, def))
		return true;

	return false;
}

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static struct ieee80211_chanctx *

ieee80211_find_reservation_chanctx(struct ieee80211_local *local,
				   const struct cfg80211_chan_def *chandef,
				   enum ieee80211_chanctx_mode mode)
{
	struct ieee80211_chanctx *ctx;

	lockdep_assert_held(&local->chanctx_mtx);

	if (mode == IEEE80211_CHANCTX_EXCLUSIVE)
		return NULL;

	list_for_each_entry(ctx, &local->chanctx_list, list) {
		if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
			continue;

		if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE)
			continue;

		if (!ieee80211_chanctx_can_reserve_chandef(local, ctx,
							   chandef))
			continue;

		return ctx;
	}

	return NULL;
}

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enum nl80211_chan_width ieee80211_get_sta_bw(struct ieee80211_sta *sta)
{
	switch (sta->bandwidth) {
	case IEEE80211_STA_RX_BW_20:
		if (sta->ht_cap.ht_supported)
			return NL80211_CHAN_WIDTH_20;
		else
			return NL80211_CHAN_WIDTH_20_NOHT;
	case IEEE80211_STA_RX_BW_40:
		return NL80211_CHAN_WIDTH_40;
	case IEEE80211_STA_RX_BW_80:
		return NL80211_CHAN_WIDTH_80;
	case IEEE80211_STA_RX_BW_160:
		/*
                 * This applied for both 160 and 80+80. since we use
                 * the returned value to consider degradation of
                 * ctx->conf.min_def, we have to make sure to take
                 * the bigger one (NL80211_CHAN_WIDTH_160).
                 * Otherwise we might try degrading even when not
                 * needed, as the max required sta_bw returned (80+80)
                 * might be smaller than the configured bw (160).
                 */
		return NL80211_CHAN_WIDTH_160;
	default:
		WARN_ON(1);
		return NL80211_CHAN_WIDTH_20;
	}
}

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static enum nl80211_chan_width

ieee80211_get_max_required_bw(struct ieee80211_sub_if_data *sdata)
{
	enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT;
	struct sta_info *sta;

	rcu_read_lock();
	list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
		if (sdata != sta->sdata &&
		    !(sta->sdata->bss && sta->sdata->bss == sdata->bss))
			continue;

		max_bw = max(max_bw, ieee80211_get_sta_bw(&sta->sta));
	}
	rcu_read_unlock();

	return max_bw;
}

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static enum nl80211_chan_width

ieee80211_get_chanctx_max_required_bw(struct ieee80211_local *local,
				      struct ieee80211_chanctx_conf *conf)
{
	struct ieee80211_sub_if_data *sdata;
	enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT;

	rcu_read_lock();
	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		struct ieee80211_vif *vif = &sdata->vif;
		enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20_NOHT;

		if (!ieee80211_sdata_running(sdata))
			continue;

		if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf)
			continue;

		switch (vif->type) {
		case NL80211_IFTYPE_AP:
		case NL80211_IFTYPE_AP_VLAN:
			width = ieee80211_get_max_required_bw(sdata);
			break;
		case NL80211_IFTYPE_STATION:
			/*
                         * The ap's sta->bandwidth is not set yet at this
                         * point, so take the width from the chandef, but
                         * account also for TDLS peers
                         */
			width = max(vif->bss_conf.chandef.width,
				    ieee80211_get_max_required_bw(sdata));
			break;
		case NL80211_IFTYPE_P2P_DEVICE:
		case NL80211_IFTYPE_NAN:
			continue;
		case NL80211_IFTYPE_ADHOC:
		case NL80211_IFTYPE_WDS:
		case NL80211_IFTYPE_MESH_POINT:
		case NL80211_IFTYPE_OCB:
			width = vif->bss_conf.chandef.width;
			break;
		case NL80211_IFTYPE_UNSPECIFIED:
		case NUM_NL80211_IFTYPES:
		case NL80211_IFTYPE_MONITOR:
		case NL80211_IFTYPE_P2P_CLIENT:
		case NL80211_IFTYPE_P2P_GO:
			WARN_ON_ONCE(1);
		}
		max_bw = max(max_bw, width);
	}

	/* use the configured bandwidth in case of monitor interface */
	sdata = rcu_dereference(local->monitor_sdata);
	if (sdata && rcu_access_pointer(sdata->vif.chanctx_conf) == conf)
		max_bw = max(max_bw, conf->def.width);

	rcu_read_unlock();

	return max_bw;
}

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/*
 * recalc the min required chan width of the channel context, which is
 * the max of min required widths of all the interfaces bound to this
 * channel context.
 */


void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local,
				      struct ieee80211_chanctx *ctx)
{
	enum nl80211_chan_width max_bw;
	struct cfg80211_chan_def min_def;

	lockdep_assert_held(&local->chanctx_mtx);

	/* don't optimize 5MHz, 10MHz, and radar_enabled confs */
	if (ctx->conf.def.width == NL80211_CHAN_WIDTH_5 ||
	    ctx->conf.def.width == NL80211_CHAN_WIDTH_10 ||
	    ctx->conf.radar_enabled) {
		ctx->conf.min_def = ctx->conf.def;
		return;
	}

	max_bw = ieee80211_get_chanctx_max_required_bw(local, &ctx->conf);

	/* downgrade chandef up to max_bw */
	min_def = ctx->conf.def;
	while (min_def.width > max_bw)
		ieee80211_chandef_downgrade(&min_def);

	if (cfg80211_chandef_identical(&ctx->conf.min_def, &min_def))
		return;

	ctx->conf.min_def = min_def;
	if (!ctx->driver_present)
		return;

	drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_MIN_WIDTH);
}

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static void ieee80211_change_chanctx(struct ieee80211_local *local,
				     struct ieee80211_chanctx *ctx,
				     const struct cfg80211_chan_def *chandef)
{
	if (cfg80211_chandef_identical(&ctx->conf.def, chandef)) {
		ieee80211_recalc_chanctx_min_def(local, ctx);
		return;
	}

	WARN_ON(!cfg80211_chandef_compatible(&ctx->conf.def, chandef));

	ctx->conf.def = *chandef;
	drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_WIDTH);
	ieee80211_recalc_chanctx_min_def(local, ctx);

	if (!local->use_chanctx) {
		local->_oper_chandef = *chandef;
		ieee80211_hw_config(local, 0);
	}
}

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static struct ieee80211_chanctx *

ieee80211_find_chanctx(struct ieee80211_local *local,
		       const struct cfg80211_chan_def *chandef,
		       enum ieee80211_chanctx_mode mode)
{
	struct ieee80211_chanctx *ctx;

	lockdep_assert_held(&local->chanctx_mtx);

	if (mode == IEEE80211_CHANCTX_EXCLUSIVE)
		return NULL;

	list_for_each_entry(ctx, &local->chanctx_list, list) {
		const struct cfg80211_chan_def *compat;

		if (ctx->replace_state != IEEE80211_CHANCTX_REPLACE_NONE)
			continue;

		if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE)
			continue;

		compat = cfg80211_chandef_compatible(&ctx->conf.def, chandef);
		if (!compat)
			continue;

		compat = ieee80211_chanctx_reserved_chandef(local, ctx,
							    compat);
		if (!compat)
			continue;

		ieee80211_change_chanctx(local, ctx, compat);

		return ctx;
	}

	return NULL;
}

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bool ieee80211_is_radar_required(struct ieee80211_local *local)
{
	struct ieee80211_sub_if_data *sdata;

	lockdep_assert_held(&local->mtx);

	rcu_read_lock();
	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		if (sdata->radar_required) {
			rcu_read_unlock();
			return true;
		}
	}
	rcu_read_unlock();

	return false;
}

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static bool

ieee80211_chanctx_radar_required(struct ieee80211_local *local,
				 struct ieee80211_chanctx *ctx)
{
	struct ieee80211_chanctx_conf *conf = &ctx->conf;
	struct ieee80211_sub_if_data *sdata;
	bool required = false;

	lockdep_assert_held(&local->chanctx_mtx);
	lockdep_assert_held(&local->mtx);

	rcu_read_lock();
	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		if (!ieee80211_sdata_running(sdata))
			continue;
		if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf)
			continue;
		if (!sdata->radar_required)
			continue;

		required = true;
		break;
	}
	rcu_read_unlock();

	return required;
}

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static struct ieee80211_chanctx *

ieee80211_alloc_chanctx(struct ieee80211_local *local,
			const struct cfg80211_chan_def *chandef,
			enum ieee80211_chanctx_mode mode)
{
	struct ieee80211_chanctx *ctx;

	lockdep_assert_held(&local->chanctx_mtx);

	ctx = kzalloc(sizeof(*ctx) + local->hw.chanctx_data_size, GFP_KERNEL);
	if (!ctx)
		return NULL;

	INIT_LIST_HEAD(&ctx->assigned_vifs);
	INIT_LIST_HEAD(&ctx->reserved_vifs);
	ctx->conf.def = *chandef;
	ctx->conf.rx_chains_static = 1;
	ctx->conf.rx_chains_dynamic = 1;
	ctx->mode = mode;
	ctx->conf.radar_enabled = false;
	ieee80211_recalc_chanctx_min_def(local, ctx);

	return ctx;
}

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static int ieee80211_add_chanctx(struct ieee80211_local *local,
				 struct ieee80211_chanctx *ctx)
{
	u32 changed;
	int err;

	lockdep_assert_held(&local->mtx);
	lockdep_assert_held(&local->chanctx_mtx);

	if (!local->use_chanctx)
		local->hw.conf.radar_enabled = ctx->conf.radar_enabled;

	/* turn idle off *before* setting channel -- some drivers need that */
	changed = ieee80211_idle_off(local);
	if (changed)
		ieee80211_hw_config(local, changed);

	if (!local->use_chanctx) {
		local->_oper_chandef = ctx->conf.def;
		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
	} else {
		err = drv_add_chanctx(local, ctx);
		if (err) {
			ieee80211_recalc_idle(local);
			return err;
		}
	}

	return 0;
}

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static struct ieee80211_chanctx *

ieee80211_new_chanctx(struct ieee80211_local *local,
		      const struct cfg80211_chan_def *chandef,
		      enum ieee80211_chanctx_mode mode)
{
	struct ieee80211_chanctx *ctx;
	int err;

	lockdep_assert_held(&local->mtx);
	lockdep_assert_held(&local->chanctx_mtx);

	ctx = ieee80211_alloc_chanctx(local, chandef, mode);
	if (!ctx)
		return ERR_PTR(-ENOMEM);

	err = ieee80211_add_chanctx(local, ctx);
	if (err) {
		kfree(ctx);
		return ERR_PTR(err);
	}

	list_add_rcu(&ctx->list, &local->chanctx_list);
	return ctx;
}

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static void ieee80211_del_chanctx(struct ieee80211_local *local,
				  struct ieee80211_chanctx *ctx)
{
	lockdep_assert_held(&local->chanctx_mtx);

	if (!local->use_chanctx) {
		struct cfg80211_chan_def *chandef = &local->_oper_chandef;
		chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
		chandef->center_freq1 = chandef->chan->center_freq;
		chandef->center_freq2 = 0;

		/* NOTE: Disabling radar is only valid here for
                 * single channel context. To be sure, check it ...
                 */
		WARN_ON(local->hw.conf.radar_enabled &&
			!list_empty(&local->chanctx_list));

		local->hw.conf.radar_enabled = false;

		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
	} else {
		drv_remove_chanctx(local, ctx);
	}

	ieee80211_recalc_idle(local);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Michal Kazior
48
40.68%
3
42.86%
Karl Beldan
28
23.73%
1
14.29%
Johannes Berg
22
18.64%
1
14.29%
Simon Wunderlich
19
16.10%
1
14.29%
John W. Linville
1
0.85%
1
14.29%
Total
118
100.00%
7
100.00%



static void ieee80211_free_chanctx(struct ieee80211_local *local,
				   struct ieee80211_chanctx *ctx)
{
	lockdep_assert_held(&local->chanctx_mtx);

	WARN_ON_ONCE(ieee80211_chanctx_refcount(local, ctx) != 0);

	list_del_rcu(&ctx->list);
	ieee80211_del_chanctx(local, ctx);
	kfree_rcu(ctx, rcu_head);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Michal Kazior
49
84.48%
3
60.00%
Simon Wunderlich
5
8.62%
1
20.00%
Johannes Berg
4
6.90%
1
20.00%
Total
58
100.00%
5
100.00%



void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local,
				       struct ieee80211_chanctx *ctx)
{
	struct ieee80211_chanctx_conf *conf = &ctx->conf;
	struct ieee80211_sub_if_data *sdata;
	const struct cfg80211_chan_def *compat = NULL;
	struct sta_info *sta;

	lockdep_assert_held(&local->chanctx_mtx);

	rcu_read_lock();
	list_for_each_entry_rcu(sdata, &local->interfaces, list) {

		if (!ieee80211_sdata_running(sdata))
			continue;
		if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf)
			continue;
		if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
			continue;

		if (!compat)
			compat = &sdata->vif.bss_conf.chandef;

		compat = cfg80211_chandef_compatible(
				&sdata->vif.bss_conf.chandef, compat);
		if (WARN_ON_ONCE(!compat))
			break;
	}

	/* TDLS peers can sometimes affect the chandef width */
	list_for_each_entry_rcu(sta, &local->sta_list, list) {
		if (!sta->uploaded ||
		    !test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW) ||
		    !test_sta_flag(sta, WLAN_STA_AUTHORIZED) ||
		    !sta->tdls_chandef.chan)
			continue;

		compat = cfg80211_chandef_compatible(&sta->tdls_chandef,
						     compat);
		if (WARN_ON_ONCE(!compat))
			break;
	}
	rcu_read_unlock();

	if (!compat)
		return;

	ieee80211_change_chanctx(local, ctx, compat);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Michal Kazior
98
44.55%
2
33.33%
Arik Nemtsov
68
30.91%
1
16.67%
Johannes Berg
43
19.55%
2
33.33%
Felix Fietkau
11
5.00%
1
16.67%
Total
220
100.00%
6
100.00%



static void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local,
					   struct ieee80211_chanctx *chanctx)
{
	bool radar_enabled;

	lockdep_assert_held(&local->chanctx_mtx);
	/* for ieee80211_is_radar_required */
	lockdep_assert_held(&local->mtx);

	radar_enabled = ieee80211_chanctx_radar_required(local, chanctx);

	if (radar_enabled == chanctx->conf.radar_enabled)
		return;

	chanctx->conf.radar_enabled = radar_enabled;

	if (!local->use_chanctx) {
		local->hw.conf.radar_enabled = chanctx->conf.radar_enabled;
		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
	}

	drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RADAR);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johannes Berg
99
96.12%
2
50.00%
Eliad Peller
4
3.88%
2
50.00%
Total
103
100.00%
4
100.00%



static int ieee80211_assign_vif_chanctx(struct ieee80211_sub_if_data *sdata,
					struct ieee80211_chanctx *new_ctx)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_chanctx_conf *conf;
	struct ieee80211_chanctx *curr_ctx = NULL;
	int ret = 0;

	if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_NAN))
		return -ENOTSUPP;

	conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
					 lockdep_is_held(&local->chanctx_mtx));

	if (conf) {
		curr_ctx = container_of(conf, struct ieee80211_chanctx, conf);

		drv_unassign_vif_chanctx(local, sdata, curr_ctx);
		conf = NULL;
		list_del(&sdata->assigned_chanctx_list);
	}

	if (new_ctx) {
		ret = drv_assign_vif_chanctx(local, sdata, new_ctx);
		if (ret)
			goto out;

		conf = &new_ctx->conf;
		list_add(&sdata->assigned_chanctx_list,
			 &new_ctx->assigned_vifs);
	}

out:
	rcu_assign_pointer(sdata->vif.chanctx_conf, conf);

	sdata->vif.bss_conf.idle = !conf;

	if (curr_ctx && ieee80211_chanctx_num_assigned(local, curr_ctx) > 0) {
		ieee80211_recalc_chanctx_chantype(local, curr_ctx);
		ieee80211_recalc_smps_chanctx(local, curr_ctx);
		ieee80211_recalc_radar_chanctx(local, curr_ctx);
		ieee80211_recalc_chanctx_min_def(local, curr_ctx);
	}

	if (new_ctx && ieee80211_chanctx_num_assigned(local, new_ctx) > 0) {
		ieee80211_recalc_txpower(sdata, false);
		ieee80211_recalc_chanctx_min_def(local, new_ctx);
	}

	if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
	    sdata->vif.type != NL80211_IFTYPE_MONITOR)
		ieee80211_bss_info_change_notify(sdata,
						 BSS_CHANGED_IDLE);

	ieee80211_check_fast_xmit_iface(sdata);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Luciano Coelho
152
52.41%
1
7.14%
Michal Kazior
85
29.31%
5
35.71%
Johannes Berg
25
8.62%
4
28.57%
Ayala Beker
17
5.86%
1
7.14%
Simon Wunderlich
5
1.72%
1
7.14%
Eliad Peller
4
1.38%
1
7.14%
Lorenzo Bianconi
2
0.69%
1
7.14%
Total
290
100.00%
14
100.00%



void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
				   struct ieee80211_chanctx *chanctx)
{
	struct ieee80211_sub_if_data *sdata;
	u8 rx_chains_static, rx_chains_dynamic;

	lockdep_assert_held(&local->chanctx_mtx);

	rx_chains_static = 1;
	rx_chains_dynamic = 1;

	rcu_read_lock();
	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		u8 needed_static, needed_dynamic;

		if (!ieee80211_sdata_running(sdata))
			continue;

		if (rcu_access_pointer(sdata->vif.chanctx_conf) !=
						&chanctx->conf)
			continue;

		switch (sdata->vif.type) {
		case NL80211_IFTYPE_P2P_DEVICE:
		case NL80211_IFTYPE_NAN:
			continue;
		case NL80211_IFTYPE_STATION:
			if (!sdata->u.mgd.associated)
				continue;
			break;
		case NL80211_IFTYPE_AP_VLAN:
			continue;
		case NL80211_IFTYPE_AP:
		case NL80211_IFTYPE_ADHOC:
		case NL80211_IFTYPE_WDS:
		case NL80211_IFTYPE_MESH_POINT:
		case NL80211_IFTYPE_OCB:
			break;
		default:
			WARN_ON_ONCE(1);
		}

		switch (sdata->smps_mode) {
		default:
			WARN_ONCE(1, "Invalid SMPS mode %d\n",
				  sdata->smps_mode);
			/* fall through */
		case IEEE80211_SMPS_OFF: