[ARP]: Introduce the arp_hdr_len helper.
There are some place, that calculate the ARP header length. These
calculations are correct, but
a) some operate with "magic" constants,
b) enlarge the code length (sometimes at the cost of coding style),
c) are not informative from the first glance.
The proposal is to introduce a helper, that includes all the good
sides of these calculations.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 9666434..5fc9d8d58 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -2646,10 +2646,7 @@
if (!slave || !slave_do_arp_validate(bond, slave))
goto out_unlock;
- /* ARP header, plus 2 device addresses, plus 2 IP addresses. */
- if (!pskb_may_pull(skb, (sizeof(struct arphdr) +
- (2 * dev->addr_len) +
- (2 * sizeof(u32)))))
+ if (!pskb_may_pull(skb, arp_hdr_len(dev)))
goto out_unlock;
arp = arp_hdr(skb);