Commit 7b20b8e8 authored by Johannes Berg's avatar Johannes Berg
Browse files

mac80211: move AP teardown code to correct place 



Since cfg80211 will now call the explicit stop_ap
operation when an AP interface goes down, move all
teardown code there and remove it from interface
handling. The only thing that needs to stay is the
code to dev_close() all dependent VLANs.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 1df332e8

net/mac80211/cfg.c

+19 −9
Original line number Diff line number Diff line
@@ -953,26 +953,36 @@ static int ieee80211_change_beacon(struct wiphy *wiphy, struct net_device *dev, 


static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)

{

	struct ieee80211_sub_if_data *sdata, *vlan;

	struct beacon_data *old;



	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

	struct ieee80211_sub_if_data *vlan;

	struct ieee80211_local *local = sdata->local;

	struct beacon_data *old_beacon;

	struct probe_resp *old_probe_resp;



	old = rtnl_dereference(sdata->u.ap.beacon);

	if (!old)

	old_beacon = rtnl_dereference(sdata->u.ap.beacon);

	if (!old_beacon)

		return -ENOENT;

	old_probe_resp = rtnl_dereference(sdata->u.ap.probe_resp);



	/* turn off carrier for this interface and dependent VLANs */

	list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)

		netif_carrier_off(vlan->dev);

	netif_carrier_off(dev);



	/* remove beacon and probe response */

	RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);

	RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);

	kfree_rcu(old_beacon, rcu_head);

	if (old_probe_resp)

		kfree_rcu(old_probe_resp, rcu_head);



	kfree_rcu(old, rcu_head);



	sta_info_flush(sdata->local, sdata);

	sta_info_flush(local, sdata);

	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);



	/* free all potentially still buffered bcast frames */

	local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps.bc_buf);

	skb_queue_purge(&sdata->u.ap.ps.bc_buf);



	ieee80211_vif_release_channel(sdata);



	return 0;

net/mac80211/iface.c

+0 −19
Original line number Diff line number Diff line
@@ -744,31 +744,12 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 
	/* APs need special treatment */

	if (sdata->vif.type == NL80211_IFTYPE_AP) {

		struct ieee80211_sub_if_data *vlan, *tmpsdata;

		struct beacon_data *old_beacon =

			rtnl_dereference(sdata->u.ap.beacon);

		struct probe_resp *old_probe_resp =

			rtnl_dereference(sdata->u.ap.probe_resp);



		/* sdata_running will return false, so this will disable */

		ieee80211_bss_info_change_notify(sdata,

						 BSS_CHANGED_BEACON_ENABLED);



		/* remove beacon and probe response */

		RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);

		RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);

		synchronize_rcu();

		kfree(old_beacon);

		kfree(old_probe_resp);



		/* down all dependent devices, that is VLANs */

		list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,

					 u.vlan.list)

			dev_close(vlan->dev);

		WARN_ON(!list_empty(&sdata->u.ap.vlans));



		/* free all potentially still buffered bcast frames */

		local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps.bc_buf);

		skb_queue_purge(&sdata->u.ap.ps.bc_buf);

	} else if (sdata->vif.type == NL80211_IFTYPE_STATION) {

		ieee80211_mgd_stop(sdata);

	}

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