[PATCH] ieee80211: Fix TKIP and WEP decryption error on SMP machines

[linux-2.6-omap-h63xx.git] / net / ieee80211 / ieee80211_crypt_wep.c

diff --git a/net/ieee80211/ieee80211_crypt_wep.c b/net/ieee80211/ieee80211_crypt_wep.c
index 0ebf235f693932e4c09241b7402658bd14d6620a..b435b28857edec3c16b201a65c620483670a0d6b 100644 (file)
--- a/net/ieee80211/ieee80211_crypt_wep.c
+++ b/net/ieee80211/ieee80211_crypt_wep.c
@@ -32,7 +32,8 @@ struct prism2_wep_data {
        u8 key[WEP_KEY_LEN + 1];
        u8 key_len;
        u8 key_idx;
-       struct crypto_tfm *tfm;
+       struct crypto_tfm *tx_tfm;
+       struct crypto_tfm *rx_tfm;
 };
 
 static void *prism2_wep_init(int keyidx)
@@ -44,13 +45,19 @@ static void *prism2_wep_init(int keyidx)
                goto fail;
        priv->key_idx = keyidx;
 
-       priv->tfm = crypto_alloc_tfm("arc4", 0);
-       if (priv->tfm == NULL) {
+       priv->tx_tfm = crypto_alloc_tfm("arc4", 0);
+       if (priv->tx_tfm == NULL) {
                printk(KERN_DEBUG "ieee80211_crypt_wep: could not allocate "
                       "crypto API arc4\n");
                goto fail;
        }
 
+       priv->rx_tfm = crypto_alloc_tfm("arc4", 0);
+       if (priv->rx_tfm == NULL) {
+               printk(KERN_DEBUG "ieee80211_crypt_wep: could not allocate "
+                      "crypto API arc4\n");
+               goto fail;
+       }
        /* start WEP IV from a random value */
        get_random_bytes(&priv->iv, 4);
 
@@ -58,8 +65,10 @@ static void *prism2_wep_init(int keyidx)
 
       fail:
        if (priv) {
-               if (priv->tfm)
-                       crypto_free_tfm(priv->tfm);
+               if (priv->tx_tfm)
+                       crypto_free_tfm(priv->tx_tfm);
+               if (priv->rx_tfm)
+                       crypto_free_tfm(priv->rx_tfm);
                kfree(priv);
        }
        return NULL;
@@ -68,8 +77,12 @@ static void *prism2_wep_init(int keyidx)
 static void prism2_wep_deinit(void *priv)
 {
        struct prism2_wep_data *_priv = priv;
-       if (_priv && _priv->tfm)
-               crypto_free_tfm(_priv->tfm);
+       if (_priv) {
+               if (_priv->tx_tfm)
+                       crypto_free_tfm(_priv->tx_tfm);
+               if (_priv->rx_tfm)
+                       crypto_free_tfm(_priv->rx_tfm);
+       }
        kfree(priv);
 }
 
@@ -151,11 +164,11 @@ static int prism2_wep_encrypt(struct sk_buff *skb, int hdr_len, void *priv)
        icv[2] = crc >> 16;
        icv[3] = crc >> 24;
 
-       crypto_cipher_setkey(wep->tfm, key, klen);
+       crypto_cipher_setkey(wep->tx_tfm, key, klen);
        sg.page = virt_to_page(pos);
        sg.offset = offset_in_page(pos);
        sg.length = len + 4;
-       crypto_cipher_encrypt(wep->tfm, &sg, &sg, len + 4);
+       crypto_cipher_encrypt(wep->tx_tfm, &sg, &sg, len + 4);
 
        return 0;
 }
@@ -194,11 +207,11 @@ static int prism2_wep_decrypt(struct sk_buff *skb, int hdr_len, void *priv)
        /* Apply RC4 to data and compute CRC32 over decrypted data */
        plen = skb->len - hdr_len - 8;
 
-       crypto_cipher_setkey(wep->tfm, key, klen);
+       crypto_cipher_setkey(wep->rx_tfm, key, klen);
        sg.page = virt_to_page(pos);
        sg.offset = offset_in_page(pos);
        sg.length = plen + 4;
-       crypto_cipher_decrypt(wep->tfm, &sg, &sg, plen + 4);
+       crypto_cipher_decrypt(wep->rx_tfm, &sg, &sg, plen + 4);
 
        crc = ~crc32_le(~0, pos, plen);
        icv[0] = crc;