mac80211: fix AP mode scanning issues

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 39098

package/kernel/mac80211/patches/300-pending_work.patch

@@ -4589,7 +4589,53 @@
  
 --- a/net/mac80211/tx.c
 +++ b/net/mac80211/tx.c
-@@ -1728,8 +1728,7 @@ netdev_tx_t ieee80211_monitor_start_xmit
+@@ -463,7 +463,6 @@ ieee80211_tx_h_unicast_ps_buf(struct iee
+ {
+ 	struct sta_info *sta = tx->sta;
+ 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
+-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
+ 	struct ieee80211_local *local = tx->local;
+ 
+ 	if (unlikely(!sta))
+@@ -474,15 +473,6 @@ ieee80211_tx_h_unicast_ps_buf(struct iee
+ 		     !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
+ 		int ac = skb_get_queue_mapping(tx->skb);
+ 
+-		/* only deauth, disassoc and action are bufferable MMPDUs */
+-		if (ieee80211_is_mgmt(hdr->frame_control) &&
+-		    !ieee80211_is_deauth(hdr->frame_control) &&
+-		    !ieee80211_is_disassoc(hdr->frame_control) &&
+-		    !ieee80211_is_action(hdr->frame_control)) {
+-			info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
+-			return TX_CONTINUE;
+-		}
+-
+ 		ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
+ 		       sta->sta.addr, sta->sta.aid, ac);
+ 		if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
+@@ -525,9 +515,21 @@ ieee80211_tx_h_unicast_ps_buf(struct iee
+ static ieee80211_tx_result debug_noinline
+ ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
+ {
++	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
++	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
++
+ 	if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
+ 		return TX_CONTINUE;
+ 
++	/* only deauth, disassoc and action are bufferable MMPDUs */
++	if (ieee80211_is_mgmt(hdr->frame_control) &&
++	    !ieee80211_is_deauth(hdr->frame_control) &&
++	    !ieee80211_is_disassoc(hdr->frame_control) &&
++	    !ieee80211_is_action(hdr->frame_control)) {
++		info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
++		return TX_CONTINUE;
++	}
++
+ 	if (tx->flags & IEEE80211_TX_UNICAST)
+ 		return ieee80211_tx_h_unicast_ps_buf(tx);
+ 	else
+@@ -1728,8 +1730,7 @@ netdev_tx_t ieee80211_monitor_start_xmit
  	 * radar detection by itself. We can do that later by adding a
  	 * monitor flag interfaces used for AP support.
  	 */