1 files changed, 17 insertions, 13 deletions

diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index 7691e4edc74a..3452d5e0a3cb 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -523,6 +523,16 @@ static void bip_aad(struct sk_buff *skb, u8 *aad)
 }
 
 
+static inline void bip_ipn_set64(u8 *d, u64 pn)
+{
+        *d++ = pn;
+        *d++ = pn >> 8;
+        *d++ = pn >> 16;
+        *d++ = pn >> 24;
+        *d++ = pn >> 32;
+        *d = pn >> 40;
+}
+
 static inline void bip_ipn_swap(u8 *d, const u8 *s)
 {
         *d++ = s[5];
@@ -541,8 +551,8 @@ ieee80211_crypto_aes_cmac_encrypt(struct ieee80211_tx_data *tx)
         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
         struct ieee80211_key *key = tx->key;
         struct ieee80211_mmie *mmie;
-        u8 *pn, aad[20];
-        int i;
+        u8 aad[20];
+        u64 pn64;
 
         if (info->control.hw_key)
                 return 0;
@@ -556,22 +566,17 @@ ieee80211_crypto_aes_cmac_encrypt(struct ieee80211_tx_data *tx)
         mmie->key_id = cpu_to_le16(key->conf.keyidx);
 
         /* PN = PN + 1 */
-        pn = key->u.aes_cmac.tx_pn;
+        pn64 = atomic64_inc_return(&key->u.aes_cmac.tx_pn);
 
-        for (i = sizeof(key->u.aes_cmac.tx_pn) - 1; i >= 0; i--) {
-                pn[i]++;
-                if (pn[i])
-                        break;
-        }
-        bip_ipn_swap(mmie->sequence_number, pn);
+        bip_ipn_set64(mmie->sequence_number, pn64);
 
         bip_aad(skb, aad);
 
         /*
          * MIC = AES-128-CMAC(IGTK, AAD || Management Frame Body || MMIE, 64)
          */
-        ieee80211_aes_cmac(key->u.aes_cmac.tfm, key->u.aes_cmac.tx_crypto_buf,
-                           aad, skb->data + 24, skb->len - 24, mmie->mic);
+        ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
+                           skb->data + 24, skb->len - 24, mmie->mic);
 
         return TX_CONTINUE;
 }
@@ -609,8 +614,7 @@ ieee80211_crypto_aes_cmac_decrypt(struct ieee80211_rx_data *rx)
         if (!(status->flag & RX_FLAG_DECRYPTED)) {
                 /* hardware didn't decrypt/verify MIC */
                 bip_aad(skb, aad);
-                ieee80211_aes_cmac(key->u.aes_cmac.tfm,
-                                   key->u.aes_cmac.rx_crypto_buf, aad,
+                ieee80211_aes_cmac(key->u.aes_cmac.tfm, aad,
                                    skb->data + 24, skb->len - 24, mic);
                 if (memcmp(mic, mmie->mic, sizeof(mmie->mic)) != 0) {
                         key->u.aes_cmac.icverrors++;