nfp: refresh port state before reporting autonegotiation

State of autonegotiation may have changed but is not yet refreshed.
Make sure ethtool respects the NFP_PORT_CHANGED flag when looking
at autoneg.
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_ethtool.c

@@ -209,7 +209,7 @@ nfp_net_get_link_ksettings(struct net_device *netdev,
 	cmd->base.duplex = DUPLEX_UNKNOWN;
 
 	port = nfp_port_from_netdev(netdev);
-	eth_port = __nfp_port_get_eth_port(port);
+	eth_port = nfp_port_get_eth_port(port);
 	if (eth_port)
 		cmd->base.autoneg = eth_port->aneg != NFP_ANEG_DISABLED ?
 			AUTONEG_ENABLE : AUTONEG_DISABLE;
@@ -219,14 +219,6 @@ nfp_net_get_link_ksettings(struct net_device *netdev,
 
 	/* Use link speed from ETH table if available, otherwise try the BAR */
 	if (eth_port) {
-		int err;
-
-		if (test_bit(NFP_PORT_CHANGED, &port->flags)) {
-			err = nfp_net_refresh_eth_port(port);
-			if (err)
-				return err;
-		}
-
 		cmd->base.port = eth_port->port_type;
 		cmd->base.speed = eth_port->speed;
 		cmd->base.duplex = DUPLEX_FULL;

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

@@ -58,6 +58,18 @@ struct nfp_eth_table_port *__nfp_port_get_eth_port(struct nfp_port *port)
 	return port->eth_port;
 }
 
+struct nfp_eth_table_port *nfp_port_get_eth_port(struct nfp_port *port)
+{
+	if (!__nfp_port_get_eth_port(port))
+		return NULL;
+
+	if (test_bit(NFP_PORT_CHANGED, &port->flags))
+		if (nfp_net_refresh_eth_port(port))
+			return NULL;
+
+	return __nfp_port_get_eth_port(port);
+}
+
 int
 nfp_port_get_phys_port_name(struct net_device *netdev, char *name, size_t len)
 {

drivers/net/ethernet/netronome/nfp/nfp_port.h

@@ -86,6 +86,7 @@ struct nfp_port {
 
 struct nfp_port *nfp_port_from_netdev(struct net_device *netdev);
 struct nfp_eth_table_port *__nfp_port_get_eth_port(struct nfp_port *port);
+struct nfp_eth_table_port *nfp_port_get_eth_port(struct nfp_port *port);
 
 int
 nfp_port_get_phys_port_name(struct net_device *netdev, char *name, size_t len);