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ipmr: __pim_rcv() is called under rcu_read_lock 

No need to get a reference on reg_dev and release it, we are in a
rcu_read_lock() protected section.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2010-10-01 16:14:55 +00:00 committed by David S. Miller
parent ddcb4541e9
commit 55747a0a73
1 changed files with 4 additions and 6 deletions
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10
net/ipv4/ipmr.c
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@ -1805,6 +1805,7 @@ dont_forward:
}
#ifdef CONFIG_IP_PIMSM
/* called with rcu_read_lock() */
static int __pim_rcv(struct mr_table *mrt, struct sk_buff *skb,
unsigned int pimlen)
{
@ -1826,26 +1827,23 @@ static int __pim_rcv(struct mr_table *mrt, struct sk_buff *skb,
read_lock(&mrt_lock);
if (mrt->mroute_reg_vif_num >= 0)
reg_dev = mrt->vif_table[mrt->mroute_reg_vif_num].dev;
if (reg_dev)
dev_hold(reg_dev);
read_unlock(&mrt_lock);
if (reg_dev == NULL)
return 1;
skb->mac_header = skb->network_header;
skb_pull(skb, (u8*)encap - skb->data);
skb_pull(skb, (u8 *)encap - skb->data);
skb_reset_network_header(skb);
skb->protocol = htons(ETH_P_IP);
skb->ip_summed = 0;
skb->ip_summed = CHECKSUM_NONE;
skb->pkt_type = PACKET_HOST;
skb_tunnel_rx(skb, reg_dev);
netif_rx(skb);
dev_put(reg_dev);
return 0;
return NET_RX_SUCCESS;
}
#endif