net: avoid a dev refcount in ip_mc_find_dev()
We hold RTNL in ip_mc_find_dev(), no need to touch device refcount.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 25f3396..a525328 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -1418,6 +1418,7 @@
write_unlock_bh(&in_dev->mc_list_lock);
}
+/* RTNL is locked */
static struct in_device *ip_mc_find_dev(struct net *net, struct ip_mreqn *imr)
{
struct flowi fl = { .nl_u = { .ip4_u =
@@ -1433,10 +1434,9 @@
return idev;
}
if (imr->imr_address.s_addr) {
- dev = ip_dev_find(net, imr->imr_address.s_addr);
+ dev = __ip_dev_find(net, imr->imr_address.s_addr, false);
if (!dev)
return NULL;
- dev_put(dev);
}
if (!dev && !ip_route_output_key(net, &rt, &fl)) {
