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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>
This commit is contained in:
Johannes Berg 2010-10-10 18:52:10 +02:00 committed by John W. Linville
parent cc2858c987
commit 730bd83b03
1 changed files with 1 additions and 7 deletions
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8
net/mac80211/wep.c
View File

@ -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);