ax25: use skb_expand_head
Use skb_expand_head() in ax25_transmit_buffer and ax25_rt_build_path.
Unlike skb_realloc_headroom, new helper does not allocate a new skb if possible.
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ax25/ax25_route.c b/net/ax25/ax25_route.c
index b40e0bc..d0b2e09 100644
--- a/net/ax25/ax25_route.c
+++ b/net/ax25/ax25_route.c
@@ -441,24 +441,17 @@ int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr)
struct sk_buff *ax25_rt_build_path(struct sk_buff *skb, ax25_address *src,
ax25_address *dest, ax25_digi *digi)
{
- struct sk_buff *skbn;
unsigned char *bp;
int len;
len = digi->ndigi * AX25_ADDR_LEN;
- if (skb_headroom(skb) < len) {
- if ((skbn = skb_realloc_headroom(skb, len)) == NULL) {
+ if (unlikely(skb_headroom(skb) < len)) {
+ skb = skb_expand_head(skb, len);
+ if (!skb) {
printk(KERN_CRIT "AX.25: ax25_dg_build_path - out of memory\n");
return NULL;
}
-
- if (skb->sk != NULL)
- skb_set_owner_w(skbn, skb->sk);
-
- consume_skb(skb);
-
- skb = skbn;
}
bp = skb_push(skb, len);