Re: [PATCH 2/2 net-next] ipv4: bump rt_genid when a relevant devconf value changes through netlink

When modifying IPv4 devconf values using netlink for some relevant
fields the rt_cache_flush() call was missing. In addition, if forwarding
is enabled on the interface then disable LRO.

This is needed to avoid possible connectivity issues and ease the
responsabilities of user space tools.

Fixes: 9f0f7272ac95 ("ipv4: AF_INET link address family")
Signed-off-by: Fernando Fernandez Mancera <redacted>
---
 net/ipv4/devinet.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 590c68e979f5..9f55c13a9c1f 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c

@@ -2159,6 +2159,8 @@ static int inet_set_link_af(struct net_device *dev, const struct nlattr *nla,
 {
 	struct in_device *in_dev = __in_dev_get_rtnl(dev);
 	struct nlattr *a, *tb[IFLA_INET_MAX+1];
+	struct net *net = dev_net(in_dev->dev);
+	bool flush_cache = false;
 	int rem;
 
 	if (!in_dev)