Re: [PATCH RFC net-next 3/3] net: dsa: implement ndo_set_netlink for chaning port's CPU port

Implement ndo_set_iflink for DSA slave device. In multi-CPU port setup
this should be used to change to which CPU destination port a given port
should be connected.

This adds a new operation into the DSA switch operations structure,
port_change_cpu_port. A driver implementing this function has the
ability to change CPU destination port of a given port.

Signed-off-by: Marek Behún <redacted>
---
 include/net/dsa.h |  6 ++++++
 net/dsa/slave.c   | 35 +++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 64bd70608f2f..4f3f0032b886 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h

@@ -545,6 +545,12 @@ struct dsa_switch_ops {
 	 */
 	netdev_tx_t (*port_deferred_xmit)(struct dsa_switch *ds, int port,
 					  struct sk_buff *skb);
+
+	/*
+	 * Multi-CPU port support
+	 */
+	int	(*port_change_cpu_port)(struct dsa_switch *ds, int port,
+					struct dsa_port *new_cpu_dp);
 };