mac80211: tkip.c use struct tkip_ctx in phase 2 key mixing

index e9ee247..a00cf1e 100644
@@ -95,10 +95,12 @@ static void tkip_mixing_phase1(struct ieee80211_key *key, const u8 *ta,
 	ctx->initialized = 1;
 }
 
-static void tkip_mixing_phase2(const u16 *p1k, const u8 *tk, u16 tsc_IV16,
-			       u8 *rc4key)
+static void tkip_mixing_phase2(struct ieee80211_key *key, struct tkip_ctx *ctx,
+			       u16 tsc_IV16, u8 *rc4key)
 {
 	u16 ppk[6];
+	const u16 *p1k = ctx->p1k;
+	const u8 *tk = &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY];
 	int i;
 
 	ppk[0] = p1k[0];

@@ -152,9 +154,7 @@ static void ieee80211_tkip_gen_rc4key(struct ieee80211_key *key, u8 *ta,
 	if (key->u.tkip.tx.iv16 == 0 || !key->u.tkip.tx.initialized)
 		tkip_mixing_phase1(key, ta, &key->u.tkip.tx, key->u.tkip.tx.iv32);
 
-	tkip_mixing_phase2(key->u.tkip.tx.p1k,
-			   &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY],
-			   key->u.tkip.tx.iv16, rc4key);
+	tkip_mixing_phase2(key, &key->u.tkip.tx, key->u.tkip.tx.iv16, rc4key);
 }
 
 void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf,

@@ -197,8 +197,7 @@ void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf,
 		return;
 	}
 
-	tkip_mixing_phase2(key->u.tkip.tx.p1k,
-		&key->conf.key[ALG_TKIP_TEMP_ENCR_KEY],	iv16, outkey);
+	tkip_mixing_phase2(key, &key->u.tkip.tx, iv16, outkey);
 }
 EXPORT_SYMBOL(ieee80211_get_tkip_key);
 

@@ -315,9 +314,7 @@ int ieee80211_tkip_decrypt_data(struct crypto_blkcipher *tfm,
 		}
 	}
 
-	tkip_mixing_phase2(key->u.tkip.rx[queue].p1k,
-			   &key->conf.key[ALG_TKIP_TEMP_ENCR_KEY],
-			   iv16, rc4key);
+	tkip_mixing_phase2(key, &key->u.tkip.rx[queue], iv16, rc4key);
 #ifdef CONFIG_TKIP_DEBUG
 	{
 		int i;