nfp: mark port state as stale if update failed

If reading new state of the port failed, mark the port back as CHANGED.
This way next user state request will trigger refresh, which will
hopefully succeed.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/netronome/nfp/nfp_net_main.c

@@ -528,6 +528,7 @@ nfp_net_eth_port_update(struct nfp_cpp *cpp, struct nfp_port *port,
 
 	eth_port = nfp_net_find_port(eth_table, port->eth_id);
 	if (!eth_port) {
+		set_bit(NFP_PORT_CHANGED, &port->flags);
 		nfp_warn(cpp, "Warning: port #%d not present after reconfig\n",
 			 port->eth_id);
 		return -EIO;
@@ -563,6 +564,9 @@ static void nfp_net_refresh_vnics(struct work_struct *work)
 
 	eth_table = nfp_eth_read_ports(pf->cpp);
 	if (!eth_table) {
+		list_for_each_entry(port, &pf->ports, port_list)
+			if (__nfp_port_get_eth_port(port))
+				set_bit(NFP_PORT_CHANGED, &port->flags);
 		rtnl_unlock();
 		nfp_err(pf->cpp, "Error refreshing port config!\n");
 		goto out;
@@ -611,6 +615,7 @@ int nfp_net_refresh_eth_port(struct nfp_port *port)
 
 	eth_table = nfp_eth_read_ports(cpp);
 	if (!eth_table) {
+		set_bit(NFP_PORT_CHANGED, &port->flags);
 		nfp_err(cpp, "Error refreshing port state table!\n");
 		return -EIO;
 	}