ip6mr: do not get a device reference in pim6_rcv()

pim6_rcv() is called under rcu_read_lock(), there is
no need to use dev_hold()/dev_put() pair.

IPv4 side was handled in commit 55747a0a73ea
("ipmr: __pim_rcv() is called under rcu_read_lock")

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index d4aad41..aa66c03 100644 (file)
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -554,7 +554,6 @@ static int pim6_rcv(struct sk_buff *skb)
        read_lock(&mrt_lock);
        if (reg_vif_num >= 0)
                reg_dev = mrt->vif_table[reg_vif_num].dev;
-       dev_hold(reg_dev);
        read_unlock(&mrt_lock);
 
        if (!reg_dev)
@@ -570,7 +569,6 @@ static int pim6_rcv(struct sk_buff *skb)
 
        netif_rx(skb);
 
-       dev_put(reg_dev);
        return 0;
  drop:
        kfree_skb(skb);