diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index e55970bf2ba06f6afdb7d80988f5ffa77f51fffe..5b8b4460b69f95f69dcd9e9786bb02d2b459aaa5 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -143,6 +143,11 @@ static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
 		return -EINVAL;
 	}
 
+	/* reject WEP and TKIP keys if WEP failed to initialize */
+	if ((alg == ALG_WEP || alg == ALG_TKIP) &&
+	    IS_ERR(sdata->local->wep_tx_tfm))
+		return -EINVAL;
+
 	key = ieee80211_key_alloc(alg, key_idx, params->key_len, params->key,
 				  params->seq_len, params->seq);
 	if (!key)
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index edf7aff93268ad18670f90f9d59cca54eae1ce3a..0e95c750ded9df169bda06ab4ac9ee7ad74604ec 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -637,11 +637,9 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
 		goto fail_sta_info;
 
 	result = ieee80211_wep_init(local);
-	if (result < 0) {
+	if (result < 0)
 		printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
 		       wiphy_name(local->hw.wiphy), result);
-		goto fail_wep;
-	}
 
 	rtnl_lock();
 
@@ -694,7 +692,6 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
  fail_rate:
 	rtnl_unlock();
 	ieee80211_wep_free(local);
- fail_wep:
 	sta_info_stop(local);
  fail_sta_info:
 	destroy_workqueue(local->workqueue);
diff --git a/net/mac80211/tkip.c b/net/mac80211/tkip.c
index 7ef491e9d66d0954aa6eba8891bcb22319f5b54b..e840c9cd46db94b122b56f2fb34bf53873585896 100644
--- a/net/mac80211/tkip.c
+++ b/net/mac80211/tkip.c
@@ -202,9 +202,9 @@ EXPORT_SYMBOL(ieee80211_get_tkip_key);
  * @payload_len is the length of payload (_not_ including IV/ICV length).
  * @ta is the transmitter addresses.
  */
-void ieee80211_tkip_encrypt_data(struct crypto_blkcipher *tfm,
-				 struct ieee80211_key *key,
-				 u8 *pos, size_t payload_len, u8 *ta)
+int ieee80211_tkip_encrypt_data(struct crypto_blkcipher *tfm,
+				struct ieee80211_key *key,
+				u8 *pos, size_t payload_len, u8 *ta)
 {
 	u8 rc4key[16];
 	struct tkip_ctx *ctx = &key->u.tkip.tx;
@@ -216,7 +216,7 @@ void ieee80211_tkip_encrypt_data(struct crypto_blkcipher *tfm,
 
 	tkip_mixing_phase2(tk, ctx, ctx->iv16, rc4key);
 
-	ieee80211_wep_encrypt_data(tfm, rc4key, 16, pos, payload_len);
+	return ieee80211_wep_encrypt_data(tfm, rc4key, 16, pos, payload_len);
 }
 
 /* Decrypt packet payload with TKIP using @key. @pos is a pointer to the
diff --git a/net/mac80211/tkip.h b/net/mac80211/tkip.h
index d4714383f5fce5a3f5216f30669b669b8a11c1aa..7e83dee976fa0d4834ec6c09d6a0bb76b3e1123e 100644
--- a/net/mac80211/tkip.h
+++ b/net/mac80211/tkip.h
@@ -15,7 +15,7 @@
 
 u8 *ieee80211_tkip_add_iv(u8 *pos, struct ieee80211_key *key, u16 iv16);
 
-void ieee80211_tkip_encrypt_data(struct crypto_blkcipher *tfm,
+int ieee80211_tkip_encrypt_data(struct crypto_blkcipher *tfm,
 				 struct ieee80211_key *key,
 				 u8 *pos, size_t payload_len, u8 *ta);
 enum {
diff --git a/net/mac80211/wep.c b/net/mac80211/wep.c
index 5f3a4113bda1682bb0d30f0eaebd6f153037e3b5..6d133b6efce5ac56167f03e4850cef8612a494d9 100644
--- a/net/mac80211/wep.c
+++ b/net/mac80211/wep.c
@@ -47,8 +47,10 @@ int ieee80211_wep_init(struct ieee80211_local *local)
 
 void ieee80211_wep_free(struct ieee80211_local *local)
 {
-	crypto_free_blkcipher(local->wep_tx_tfm);
-	crypto_free_blkcipher(local->wep_rx_tfm);
+	if (!IS_ERR(local->wep_tx_tfm))
+		crypto_free_blkcipher(local->wep_tx_tfm);
+	if (!IS_ERR(local->wep_rx_tfm))
+		crypto_free_blkcipher(local->wep_rx_tfm);
 }
 
 static inline bool ieee80211_wep_weak_iv(u32 iv, int keylen)
@@ -122,19 +124,24 @@ static void ieee80211_wep_remove_iv(struct ieee80211_local *local,
 /* Perform WEP encryption using given key. data buffer must have tailroom
  * for 4-byte ICV. data_len must not include this ICV. Note: this function
  * does _not_ add IV. data = RC4(data | CRC32(data)) */
-void ieee80211_wep_encrypt_data(struct crypto_blkcipher *tfm, u8 *rc4key,
-				size_t klen, u8 *data, size_t data_len)
+int ieee80211_wep_encrypt_data(struct crypto_blkcipher *tfm, u8 *rc4key,
+			       size_t klen, u8 *data, size_t data_len)
 {
 	struct blkcipher_desc desc = { .tfm = tfm };
 	struct scatterlist sg;
 	__le32 icv;
 
+	if (IS_ERR(tfm))
+		return -1;
+
 	icv = cpu_to_le32(~crc32_le(~0, data, data_len));
 	put_unaligned(icv, (__le32 *)(data + data_len));
 
 	crypto_blkcipher_setkey(tfm, rc4key, klen);
 	sg_init_one(&sg, data, data_len + WEP_ICV_LEN);
 	crypto_blkcipher_encrypt(&desc, &sg, &sg, sg.length);
+
+	return 0;
 }
 
 
@@ -168,10 +175,8 @@ int ieee80211_wep_encrypt(struct ieee80211_local *local,
 	/* Add room for ICV */
 	skb_put(skb, WEP_ICV_LEN);
 
-	ieee80211_wep_encrypt_data(local->wep_tx_tfm, rc4key, keylen + 3,
-				   iv + WEP_IV_LEN, len);
-
-	return 0;
+	return ieee80211_wep_encrypt_data(local->wep_tx_tfm, rc4key, keylen + 3,
+					  iv + WEP_IV_LEN, len);
 }
 
 
@@ -185,6 +190,9 @@ int ieee80211_wep_decrypt_data(struct crypto_blkcipher *tfm, u8 *rc4key,
 	struct scatterlist sg;
 	__le32 crc;
 
+	if (IS_ERR(tfm))
+		return -1;
+
 	crypto_blkcipher_setkey(tfm, rc4key, klen);
 	sg_init_one(&sg, data, data_len + WEP_ICV_LEN);
 	crypto_blkcipher_decrypt(&desc, &sg, &sg, sg.length);
diff --git a/net/mac80211/wep.h b/net/mac80211/wep.h
index fe29d7e5759fe3704658afb430b7e071921a21d0..58654ee335186d2a3d0f588221dd62d22cf4cf0d 100644
--- a/net/mac80211/wep.h
+++ b/net/mac80211/wep.h
@@ -18,7 +18,7 @@
 
 int ieee80211_wep_init(struct ieee80211_local *local);
 void ieee80211_wep_free(struct ieee80211_local *local);
-void ieee80211_wep_encrypt_data(struct crypto_blkcipher *tfm, u8 *rc4key,
+int ieee80211_wep_encrypt_data(struct crypto_blkcipher *tfm, u8 *rc4key,
 				size_t klen, u8 *data, size_t data_len);
 int ieee80211_wep_encrypt(struct ieee80211_local *local,
 			  struct sk_buff *skb,
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index a14e67707476ac4e7cb4e1f24b6ce77b2cc57969..8d59d27d887e3a0b96d9d995e3138595f0a13c79 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -183,9 +183,8 @@ static int tkip_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb)
 	skb_put(skb, TKIP_ICV_LEN);
 
 	hdr = (struct ieee80211_hdr *) skb->data;
-	ieee80211_tkip_encrypt_data(tx->local->wep_tx_tfm,
-				    key, pos, len, hdr->addr2);
-	return 0;
+	return ieee80211_tkip_encrypt_data(tx->local->wep_tx_tfm,
+					   key, pos, len, hdr->addr2);
 }