[PATCH] ieee80211: Add TKIP crypt->build_iv

This patch adds ieee80211 TKIP build_iv() method to support hardwares
that can do TKIP encryption but relies on ieee80211 layer to build
the IV. It also changes the build_iv() interface to return the key
if possible after the IV is built (this is required by TKIP).

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/ieee80211/ieee80211_tx.c

@@ -470,7 +470,9 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
 			atomic_inc(&crypt->refcnt);
 			if (crypt->ops->build_iv)
 				crypt->ops->build_iv(skb_frag, hdr_len,
-						     crypt->priv);
+				      ieee->sec.keys[ieee->sec.active_key],
+				      ieee->sec.key_sizes[ieee->sec.active_key],
+				      crypt->priv);
 			atomic_dec(&crypt->refcnt);
 		}