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@ -64,6 +64,11 @@
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#define IEEE80211_ADDBA_PARAM_TID_MASK 0x003C
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#define IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK 0xFFA0
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/* next values represent the buffer size for A-MPDU frame.
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* According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2) */
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#define IEEE80211_MIN_AMPDU_BUF 0x8
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#define IEEE80211_MAX_AMPDU_BUF 0x40
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static void ieee80211_send_probe_req(struct net_device *dev, u8 *dst,
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u8 *ssid, size_t ssid_len);
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static struct ieee80211_sta_bss *
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@ -1005,7 +1010,8 @@ static void ieee80211_send_addba_resp(struct net_device *dev, u8 *da, u16 tid,
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struct ieee80211_mgmt *mgmt;
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u16 capab;
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skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
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skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
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sizeof(mgmt->u.action.u.addba_resp));
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if (!skb) {
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printk(KERN_DEBUG "%s: failed to allocate buffer "
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"for addba resp frame\n", dev->name);
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@ -1047,9 +1053,14 @@ static void ieee80211_sta_process_addba_request(struct net_device *dev,
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size_t len)
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{
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struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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struct ieee80211_hw *hw = &local->hw;
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struct ieee80211_conf *conf = &hw->conf;
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struct sta_info *sta;
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u16 capab, tid, timeout, ba_policy, buf_size, status;
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struct tid_ampdu_rx *tid_agg_rx;
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u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num, status;
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u8 dialog_token;
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int ret = -EOPNOTSUPP;
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DECLARE_MAC_BUF(mac);
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sta = sta_info_get(local, mgmt->sa);
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if (!sta)
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@ -1058,28 +1069,216 @@ static void ieee80211_sta_process_addba_request(struct net_device *dev,
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/* extract session parameters from addba request frame */
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dialog_token = mgmt->u.action.u.addba_req.dialog_token;
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timeout = le16_to_cpu(mgmt->u.action.u.addba_req.timeout);
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start_seq_num =
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le16_to_cpu(mgmt->u.action.u.addba_req.start_seq_num) >> 4;
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capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
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ba_policy = (capab & IEEE80211_ADDBA_PARAM_POLICY_MASK) >> 1;
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tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
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buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6;
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/* TODO - currently aggregation is declined (A-MPDU add BA request
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* acceptance is not obligatory by 802.11n draft), but here is
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* the entry point for dealing with it */
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#ifdef MAC80211_HT_DEBUG
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if (net_ratelimit())
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printk(KERN_DEBUG "Add Block Ack request arrived,"
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" currently denying it\n");
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#endif /* MAC80211_HT_DEBUG */
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status = WLAN_STATUS_REQUEST_DECLINED;
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/* sanity check for incoming parameters:
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* check if configuration can support the BA policy
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* and if buffer size does not exceeds max value */
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if (((ba_policy != 1)
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&& (!(conf->ht_conf.cap & IEEE80211_HT_CAP_DELAY_BA)))
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|| (buf_size > IEEE80211_MAX_AMPDU_BUF)) {
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status = WLAN_STATUS_INVALID_QOS_PARAM;
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#ifdef CONFIG_MAC80211_HT_DEBUG
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if (net_ratelimit())
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printk(KERN_DEBUG "Block Ack Req with bad params from "
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"%s on tid %u. policy %d, buffer size %d\n",
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print_mac(mac, mgmt->sa), tid, ba_policy,
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buf_size);
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#endif /* CONFIG_MAC80211_HT_DEBUG */
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goto end_no_lock;
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}
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/* determine default buffer size */
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if (buf_size == 0) {
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struct ieee80211_hw_mode *mode = conf->mode;
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buf_size = IEEE80211_MIN_AMPDU_BUF;
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buf_size = buf_size << mode->ht_info.ampdu_factor;
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}
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tid_agg_rx = &sta->ampdu_mlme.tid_rx[tid];
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/* examine state machine */
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spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
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if (tid_agg_rx->state != HT_AGG_STATE_IDLE) {
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#ifdef CONFIG_MAC80211_HT_DEBUG
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if (net_ratelimit())
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printk(KERN_DEBUG "unexpected Block Ack Req from "
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"%s on tid %u\n",
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print_mac(mac, mgmt->sa), tid);
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#endif /* CONFIG_MAC80211_HT_DEBUG */
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goto end;
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}
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/* prepare reordering buffer */
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tid_agg_rx->reorder_buf =
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kmalloc(buf_size * sizeof(struct sk_buf *), GFP_ATOMIC);
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if ((!tid_agg_rx->reorder_buf) && net_ratelimit()) {
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printk(KERN_ERR "can not allocate reordering buffer "
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"to tid %d\n", tid);
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goto end;
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}
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memset(tid_agg_rx->reorder_buf, 0,
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buf_size * sizeof(struct sk_buf *));
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if (local->ops->ampdu_action)
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ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_START,
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sta->addr, tid, start_seq_num);
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#ifdef CONFIG_MAC80211_HT_DEBUG
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printk(KERN_DEBUG "Rx A-MPDU on tid %d result %d", tid, ret);
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#endif /* CONFIG_MAC80211_HT_DEBUG */
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if (ret) {
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kfree(tid_agg_rx->reorder_buf);
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goto end;
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}
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/* change state and send addba resp */
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tid_agg_rx->state = HT_AGG_STATE_OPERATIONAL;
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tid_agg_rx->dialog_token = dialog_token;
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tid_agg_rx->ssn = start_seq_num;
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tid_agg_rx->head_seq_num = start_seq_num;
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tid_agg_rx->buf_size = buf_size;
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tid_agg_rx->timeout = timeout;
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tid_agg_rx->stored_mpdu_num = 0;
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status = WLAN_STATUS_SUCCESS;
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end:
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spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
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end_no_lock:
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ieee80211_send_addba_resp(sta->dev, sta->addr, tid, dialog_token,
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status, 1, buf_size, timeout);
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sta_info_put(sta);
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}
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void ieee80211_send_delba(struct net_device *dev, const u8 *da, u16 tid,
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u16 initiator, u16 reason_code)
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{
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struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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struct ieee80211_if_sta *ifsta = &sdata->u.sta;
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struct sk_buff *skb;
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struct ieee80211_mgmt *mgmt;
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u16 params;
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skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom + 1 +
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sizeof(mgmt->u.action.u.delba));
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if (!skb) {
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printk(KERN_ERR "%s: failed to allocate buffer "
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"for delba frame\n", dev->name);
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return;
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}
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skb_reserve(skb, local->hw.extra_tx_headroom);
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mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
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memset(mgmt, 0, 24);
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memcpy(mgmt->da, da, ETH_ALEN);
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memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
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if (sdata->type == IEEE80211_IF_TYPE_AP)
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memcpy(mgmt->bssid, dev->dev_addr, ETH_ALEN);
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else
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memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);
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mgmt->frame_control = IEEE80211_FC(IEEE80211_FTYPE_MGMT,
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IEEE80211_STYPE_ACTION);
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skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
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mgmt->u.action.category = WLAN_CATEGORY_BACK;
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mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
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params = (u16)(initiator << 11); /* bit 11 initiator */
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params |= (u16)(tid << 12); /* bit 15:12 TID number */
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mgmt->u.action.u.delba.params = cpu_to_le16(params);
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mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
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ieee80211_sta_tx(dev, skb, 0);
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}
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void ieee80211_sta_stop_rx_ba_session(struct net_device *dev, u8 *ra, u16 tid,
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u16 initiator, u16 reason)
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{
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struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
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struct ieee80211_hw *hw = &local->hw;
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struct sta_info *sta;
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int ret;
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sta = sta_info_get(local, ra);
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if (!sta)
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return;
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/* check if TID is in operational state */
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spin_lock_bh(&sta->ampdu_mlme.ampdu_rx);
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if (sta->ampdu_mlme.tid_rx[tid].state
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!= HT_AGG_STATE_OPERATIONAL) {
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spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
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if (net_ratelimit())
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printk(KERN_DEBUG "rx BA session requested to stop on "
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"inactive tid %d\n", tid);
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sta_info_put(sta);
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return;
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}
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sta->ampdu_mlme.tid_rx[tid].state =
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HT_AGG_STATE_REQ_STOP_BA_MSK |
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(initiator << HT_AGG_STATE_INITIATOR_SHIFT);
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spin_unlock_bh(&sta->ampdu_mlme.ampdu_rx);
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/* stop HW Rx aggregation. ampdu_action existence
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* already verified in session init so we add the BUG_ON */
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BUG_ON(!local->ops->ampdu_action);
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ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_RX_STOP,
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ra, tid, EINVAL);
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if (ret)
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printk(KERN_DEBUG "HW problem - can not stop rx "
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"aggergation for tid %d\n", tid);
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/* shutdown timer has not expired */
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if (initiator != WLAN_BACK_TIMER)
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del_timer_sync(&sta->ampdu_mlme.tid_rx[tid].
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session_timer);
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/* check if this is a self generated aggregation halt */
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if (initiator == WLAN_BACK_RECIPIENT || initiator == WLAN_BACK_TIMER)
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ieee80211_send_delba(dev, ra, tid, 0, reason);
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/* free the reordering buffer */
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kfree(sta->ampdu_mlme.tid_rx[tid].reorder_buf);
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sta->ampdu_mlme.tid_rx[tid].state = HT_AGG_STATE_IDLE;
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sta_info_put(sta);
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}
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/*
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* After receiving Block Ack Request (BAR) we activated a
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* timer after each frame arrives from the originator.
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* if this timer expires ieee80211_sta_stop_rx_ba_session will be executed.
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*/
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void sta_rx_agg_session_timer_expired(unsigned long data)
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{
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/* not an elegant detour, but there is no choice as the timer passes
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* only one argument, and verious sta_info are needed here, so init
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* flow in sta_info_add gives the TID as data, while the timer_to_id
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* array gives the sta through container_of */
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u8 *ptid = (u8 *)data;
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u8 *timer_to_id = ptid - *ptid;
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struct sta_info *sta = container_of(timer_to_id, struct sta_info,
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timer_to_tid[0]);
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printk(KERN_DEBUG "rx session timer expired on tid %d\n", (u16)*ptid);
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ieee80211_sta_stop_rx_ba_session(sta->dev, sta->addr, (u16)*ptid,
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WLAN_BACK_TIMER,
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WLAN_REASON_QSTA_TIMEOUT);
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}
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static void ieee80211_rx_mgmt_auth(struct net_device *dev,
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struct ieee80211_if_sta *ifsta,
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struct ieee80211_mgmt *mgmt,
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