diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index bab5c63c0bad798529b3c5a964db995be4eef6b0..84cef600c5730e74c6456e801ffa93ef55e4e47f 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -522,6 +522,12 @@ int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
 		memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
 		       sizeof(sdata->vif.hw_queue));
 		sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
+
+		mutex_lock(&local->key_mtx);
+		sdata->crypto_tx_tailroom_needed_cnt +=
+			master->crypto_tx_tailroom_needed_cnt;
+		mutex_unlock(&local->key_mtx);
+
 		break;
 		}
 	case NL80211_IFTYPE_AP:
diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index 2291cd7300911514db84c0135369b807e93a9d06..a907f2d5c12d857bf1811af24e57f5af09eb8665 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -58,6 +58,22 @@ static void assert_key_lock(struct ieee80211_local *local)
 	lockdep_assert_held(&local->key_mtx);
 }
 
+static void
+update_vlan_tailroom_need_count(struct ieee80211_sub_if_data *sdata, int delta)
+{
+	struct ieee80211_sub_if_data *vlan;
+
+	if (sdata->vif.type != NL80211_IFTYPE_AP)
+		return;
+
+	mutex_lock(&sdata->local->mtx);
+
+	list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
+		vlan->crypto_tx_tailroom_needed_cnt += delta;
+
+	mutex_unlock(&sdata->local->mtx);
+}
+
 static void increment_tailroom_need_count(struct ieee80211_sub_if_data *sdata)
 {
 	/*
@@ -79,6 +95,8 @@ static void increment_tailroom_need_count(struct ieee80211_sub_if_data *sdata)
 	 * http://mid.gmane.org/1308590980.4322.19.camel@jlt3.sipsolutions.net
 	 */
 
+	update_vlan_tailroom_need_count(sdata, 1);
+
 	if (!sdata->crypto_tx_tailroom_needed_cnt++) {
 		/*
 		 * Flush all XMIT packets currently using HW encryption or no
@@ -88,6 +106,15 @@ static void increment_tailroom_need_count(struct ieee80211_sub_if_data *sdata)
 	}
 }
 
+static void decrease_tailroom_need_count(struct ieee80211_sub_if_data *sdata,
+					 int delta)
+{
+	WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt < delta);
+
+	update_vlan_tailroom_need_count(sdata, -delta);
+	sdata->crypto_tx_tailroom_needed_cnt -= delta;
+}
+
 static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key)
 {
 	struct ieee80211_sub_if_data *sdata;
@@ -144,7 +171,7 @@ static int ieee80211_key_enable_hw_accel(struct ieee80211_key *key)
 
 		if (!((key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC) ||
 		      (key->conf.flags & IEEE80211_KEY_FLAG_RESERVE_TAILROOM)))
-			sdata->crypto_tx_tailroom_needed_cnt--;
+			decrease_tailroom_need_count(sdata, 1);
 
 		WARN_ON((key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) &&
 			(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV));
@@ -541,7 +568,7 @@ static void __ieee80211_key_destroy(struct ieee80211_key *key,
 			schedule_delayed_work(&sdata->dec_tailroom_needed_wk,
 					      HZ/2);
 		} else {
-			sdata->crypto_tx_tailroom_needed_cnt--;
+			decrease_tailroom_need_count(sdata, 1);
 		}
 	}
 
@@ -631,6 +658,7 @@ void ieee80211_key_free(struct ieee80211_key *key, bool delay_tailroom)
 void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_key *key;
+	struct ieee80211_sub_if_data *vlan;
 
 	ASSERT_RTNL();
 
@@ -639,7 +667,14 @@ void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata)
 
 	mutex_lock(&sdata->local->key_mtx);
 
-	sdata->crypto_tx_tailroom_needed_cnt = 0;
+	WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt ||
+		     sdata->crypto_tx_tailroom_pending_dec);
+
+	if (sdata->vif.type == NL80211_IFTYPE_AP) {
+		list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
+			WARN_ON_ONCE(vlan->crypto_tx_tailroom_needed_cnt ||
+				     vlan->crypto_tx_tailroom_pending_dec);
+	}
 
 	list_for_each_entry(key, &sdata->key_list, list) {
 		increment_tailroom_need_count(sdata);
@@ -649,6 +684,22 @@ void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata)
 	mutex_unlock(&sdata->local->key_mtx);
 }
 
+void ieee80211_reset_crypto_tx_tailroom(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_sub_if_data *vlan;
+
+	mutex_lock(&sdata->local->key_mtx);
+
+	sdata->crypto_tx_tailroom_needed_cnt = 0;
+
+	if (sdata->vif.type == NL80211_IFTYPE_AP) {
+		list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
+			vlan->crypto_tx_tailroom_needed_cnt = 0;
+	}
+
+	mutex_unlock(&sdata->local->key_mtx);
+}
+
 void ieee80211_iter_keys(struct ieee80211_hw *hw,
 			 struct ieee80211_vif *vif,
 			 void (*iter)(struct ieee80211_hw *hw,
@@ -688,8 +739,8 @@ static void ieee80211_free_keys_iface(struct ieee80211_sub_if_data *sdata,
 {
 	struct ieee80211_key *key, *tmp;
 
-	sdata->crypto_tx_tailroom_needed_cnt -=
-		sdata->crypto_tx_tailroom_pending_dec;
+	decrease_tailroom_need_count(sdata,
+				     sdata->crypto_tx_tailroom_pending_dec);
 	sdata->crypto_tx_tailroom_pending_dec = 0;
 
 	ieee80211_debugfs_key_remove_mgmt_default(sdata);
@@ -709,6 +760,7 @@ void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata,
 {
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_sub_if_data *vlan;
+	struct ieee80211_sub_if_data *master;
 	struct ieee80211_key *key, *tmp;
 	LIST_HEAD(keys);
 
@@ -728,8 +780,20 @@ void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata,
 	list_for_each_entry_safe(key, tmp, &keys, list)
 		__ieee80211_key_destroy(key, false);
 
-	WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt ||
-		     sdata->crypto_tx_tailroom_pending_dec);
+	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
+		if (sdata->bss) {
+			master = container_of(sdata->bss,
+					      struct ieee80211_sub_if_data,
+					      u.ap);
+
+			WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt !=
+				     master->crypto_tx_tailroom_needed_cnt);
+		}
+	} else {
+		WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt ||
+			     sdata->crypto_tx_tailroom_pending_dec);
+	}
+
 	if (sdata->vif.type == NL80211_IFTYPE_AP) {
 		list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
 			WARN_ON_ONCE(vlan->crypto_tx_tailroom_needed_cnt ||
@@ -793,8 +857,8 @@ void ieee80211_delayed_tailroom_dec(struct work_struct *wk)
 	 */
 
 	mutex_lock(&sdata->local->key_mtx);
-	sdata->crypto_tx_tailroom_needed_cnt -=
-		sdata->crypto_tx_tailroom_pending_dec;
+	decrease_tailroom_need_count(sdata,
+				     sdata->crypto_tx_tailroom_pending_dec);
 	sdata->crypto_tx_tailroom_pending_dec = 0;
 	mutex_unlock(&sdata->local->key_mtx);
 }
diff --git a/net/mac80211/key.h b/net/mac80211/key.h
index c5a31835be0e0ca22c154b1345d91be761308833..96557dd1e77dff325072cff12b7b671aad942015 100644
--- a/net/mac80211/key.h
+++ b/net/mac80211/key.h
@@ -161,6 +161,7 @@ void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata,
 void ieee80211_free_sta_keys(struct ieee80211_local *local,
 			     struct sta_info *sta);
 void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata);
+void ieee80211_reset_crypto_tx_tailroom(struct ieee80211_sub_if_data *sdata);
 
 #define key_mtx_dereference(local, ref) \
 	rcu_dereference_protected(ref, lockdep_is_held(&((local)->key_mtx)))
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 79412f16b61db9953a4a537db3bd5693d7c61cdb..b864ebc6ab8fbf2a09baca02e650e7fe0314cc75 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -2022,6 +2022,9 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 	mutex_unlock(&local->sta_mtx);
 
 	/* add back keys */
+	list_for_each_entry(sdata, &local->interfaces, list)
+		ieee80211_reset_crypto_tx_tailroom(sdata);
+
 	list_for_each_entry(sdata, &local->interfaces, list)
 		if (ieee80211_sdata_running(sdata))
 			ieee80211_enable_keys(sdata);