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wpan: use stack buffer instead of heap

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head buffer is only temporary available in mac802154_header_create.
So it's not necessary to put it on the heap.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Aring 2013-02-05 10:23:44 +00:00 committed by David S. Miller
parent fc4e98dbba
commit 25060d8f3f
1 changed files with 1 additions and 6 deletions
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7
net/mac802154/wpan.c
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@ -137,16 +137,12 @@ static int mac802154_header_create(struct sk_buff *skb,
struct ieee802154_addr dev_addr; struct ieee802154_addr dev_addr;
struct mac802154_sub_if_data *priv = netdev_priv(dev); struct mac802154_sub_if_data *priv = netdev_priv(dev);
int pos = 2; int pos = 2;
u8 *head; u8 head[MAC802154_FRAME_HARD_HEADER_LEN];
u16 fc; u16 fc;
if (!daddr) if (!daddr)
return -EINVAL; return -EINVAL;
head = kzalloc(MAC802154_FRAME_HARD_HEADER_LEN, GFP_KERNEL);
if (head == NULL)
return -ENOMEM;
head[pos++] = mac_cb(skb)->seq; /* DSN/BSN */ head[pos++] = mac_cb(skb)->seq; /* DSN/BSN */
fc = mac_cb_type(skb); fc = mac_cb_type(skb);
@ -210,7 +206,6 @@ static int mac802154_header_create(struct sk_buff *skb,
head[1] = fc >> 8; head[1] = fc >> 8;
memcpy(skb_push(skb, pos), head, pos); memcpy(skb_push(skb, pos), head, pos);
kfree(head);
return pos; return pos;
} }