ipv6: mcast: Remove unnecessary null check in ip6_mc_find_dev()

These is no need to check null for idev before return NULL.

Signed-off-by: Yue Haibing <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Reviewed-by: Kuniyuki Iwashima <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: Yue Haibing

net/ipv6/mcast.c

@@ -329,9 +329,6 @@ static struct inet6_dev *ip6_mc_find_dev(struct net *net,
 	idev = in6_dev_get(dev);
 	dev_put(dev);
 
-	if (!idev)
-		return NULL;
-
 	return idev;
 }