mac80211: don't kmalloc 16 bytes

Since this small buffer isn't used for DMA,
we can simply allocate it on the stack, it
just needs to be 16 bytes of which only 8
will be used for WEP40 keys.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 1 insertions, 7 deletions

diff --git a/net/mac80211/wep.c b/net/mac80211/wep.c
index f27484c22b9f..2ff6d1e3ed21 100644
--- a/net/mac80211/wep.c
+++ b/net/mac80211/wep.c
@@ -222,7 +222,7 @@ static int ieee80211_wep_decrypt(struct ieee80211_local *local,
                                  struct ieee80211_key *key)
 {
         u32 klen;
-        u8 *rc4key;
+        u8 rc4key[3 + WLAN_KEY_LEN_WEP104];
         u8 keyidx;
         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
         unsigned int hdrlen;
@@ -245,10 +245,6 @@ static int ieee80211_wep_decrypt(struct ieee80211_local *local,
 
         klen = 3 + key->conf.keylen;
 
-        rc4key = kmalloc(klen, GFP_ATOMIC);
-        if (!rc4key)
-                return -1;
-
         /* Prepend 24-bit IV to RC4 key */
         memcpy(rc4key, skb->data + hdrlen, 3);
 
@@ -260,8 +256,6 @@ static int ieee80211_wep_decrypt(struct ieee80211_local *local,
                                        len))
                 ret = -1;
 
-        kfree(rc4key);
-
         /* Trim ICV */
         skb_trim(skb, skb->len - WEP_ICV_LEN);