- skb = skb_dequeue(&rx->sta->tx_filtered);
- if (!skb) {
- skb = skb_dequeue(&rx->sta->ps_tx_buf);
- if (skb)
- rx->local->total_ps_buffered--;
- }
- no_pending_pkts = skb_queue_empty(&rx->sta->tx_filtered) &&
- skb_queue_empty(&rx->sta->ps_tx_buf);
-
- if (skb) {
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- struct ieee80211_hdr *hdr =
- (struct ieee80211_hdr *) skb->data;
-
- /*
- * Tell TX path to send this frame even though the STA may
- * still remain is PS mode after this frame exchange.
- */
- info->flags |= IEEE80211_TX_CTL_PSPOLL_RESPONSE;
-
-#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
- printk(KERN_DEBUG "STA %pM aid %d: PS Poll (entries after %d)\n",
- rx->sta->sta.addr, rx->sta->sta.aid,
- skb_queue_len(&rx->sta->ps_tx_buf));
-#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
-
- /* Use MoreData flag to indicate whether there are more
- * buffered frames for this STA */
- if (no_pending_pkts)
- hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
- else
- hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA);
-
- ieee80211_add_pending_skb(rx->local, skb);
-
- if (no_pending_pkts)
- sta_info_clear_tim_bit(rx->sta);
-#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
- } else if (!rx->sent_ps_buffered) {
- /*
- * FIXME: This can be the result of a race condition between
- * us expiring a frame and the station polling for it.
- * Should we send it a null-func frame indicating we
- * have nothing buffered for it?
- */
- printk(KERN_DEBUG "%s: STA %pM sent PS Poll even "
- "though there are no buffered frames for it\n",
- rx->dev->name, rx->sta->sta.addr);
-#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
- }