net: dsa: loop: Hook PHY statistics

We just return the same statistics through ethtool_get_stats() and
ethtool_get_phy_stats() for simplicity since this is just a mock-up driver.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/dsa_loop.c

@@ -88,7 +88,7 @@ static int dsa_loop_setup(struct dsa_switch *ds)
 
 static int dsa_loop_get_sset_count(struct dsa_switch *ds, int port, int sset)
 {
-	if (sset != ETH_SS_STATS)
+	if (sset != ETH_SS_STATS && sset != ETH_SS_PHY_STATS)
 		return 0;
 
 	return __DSA_LOOP_CNT_MAX;
@@ -100,7 +100,7 @@ static void dsa_loop_get_strings(struct dsa_switch *ds, int port,
 	struct dsa_loop_priv *ps = ds->priv;
 	unsigned int i;
 
-	if (stringset != ETH_SS_STATS)
+	if (stringset != ETH_SS_STATS && stringset != ETH_SS_PHY_STATS)
 		return;
 
 	for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
@@ -263,6 +263,7 @@ static const struct dsa_switch_ops dsa_loop_driver = {
 	.get_strings		= dsa_loop_get_strings,
 	.get_ethtool_stats	= dsa_loop_get_ethtool_stats,
 	.get_sset_count		= dsa_loop_get_sset_count,
+	.get_ethtool_phy_stats	= dsa_loop_get_ethtool_stats,
 	.phy_read		= dsa_loop_phy_read,
 	.phy_write		= dsa_loop_phy_write,
 	.port_bridge_join	= dsa_loop_port_bridge_join,