[MAC80211]: remove fake set_key() call

Remove adding a fake key with a NONE key algorithm for each
associated STA. If we have hardware with such TX filtering
we should probably extend the sta_table_notification()
callback with the sta information instead; the fact that
it's treated as a key for some atheros hardware shouldn't
bother the stack.
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Acked-by: NMichael Wu <flamingice@sourmilk.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/mac80211/debugfs_sta.c

@@ -60,7 +60,6 @@ static const struct file_operations sta_ ##name## _ops = {		\
 		STA_OPS(name)
 
 STA_FILE(aid, aid, D);
-STA_FILE(key_idx_compression, key_idx_compression, D);
 STA_FILE(dev, dev->name, S);
 STA_FILE(vlan_id, vlan_id, D);
 STA_FILE(rx_packets, rx_packets, LU);

net/mac80211/sta_info.c

@@ -165,7 +165,6 @@ struct sta_info * sta_info_add(struct ieee80211_local *local,
 		local->ops->sta_table_notification(local_to_hw(local),
 						  local->num_sta);
 	write_unlock_bh(&local->sta_lock);
-	sta->key_idx_compression = HW_KEY_IDX_INVALID;
 
 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 	printk(KERN_DEBUG "%s: Added STA " MAC_FMT "\n",
@@ -226,23 +225,6 @@ void sta_info_free(struct sta_info *sta)
 		dev_kfree_skb(skb);
 	}
 
-	if (sta->key) {
-		if (local->ops->set_key) {
-			local->ops->set_key(local_to_hw(local),
-					   DISABLE_KEY, sta->addr,
-					   &sta->key->conf);
-		}
-	} else if (sta->key_idx_compression != HW_KEY_IDX_INVALID) {
-		struct ieee80211_key_conf conf;
-		memset(&conf, 0, sizeof(conf));
-		conf.hw_key_idx = sta->key_idx_compression;
-		conf.alg = ALG_NONE;
-		conf.flags |= IEEE80211_KEY_FORCE_SW_ENCRYPT;
-		local->ops->set_key(local_to_hw(local), DISABLE_KEY,
-				    sta->addr, &conf);
-		sta->key_idx_compression = HW_KEY_IDX_INVALID;
-	}
-
 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 	printk(KERN_DEBUG "%s: Removed STA " MAC_FMT "\n",
 	       local->mdev->name, MAC_ARG(sta->addr));

net/mac80211/sta_info.h

@@ -90,10 +90,6 @@ struct sta_info {
 	int channel_use;
 	int channel_use_raw;
 
-	int key_idx_compression; /* key table index for compression and TX
-				  * filtering; used only if sta->key is not
-				  * set */
-
 	int assoc_ap; /* whether this is an AP that we are
 		       * associated with as a client */
 

net/mac80211/tx.c

@@ -426,10 +426,7 @@ ieee80211_tx_h_ps_buf(struct ieee80211_txrx_data *tx)
 static ieee80211_txrx_result
 ieee80211_tx_h_select_key(struct ieee80211_txrx_data *tx)
 {
-	if (tx->sta)
-		tx->u.tx.control->key_idx = tx->sta->key_idx_compression;
-	else
-		tx->u.tx.control->key_idx = HW_KEY_IDX_INVALID;
+	tx->u.tx.control->key_idx = HW_KEY_IDX_INVALID;
 
 	if (unlikely(tx->u.tx.control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
 		tx->key = NULL;