net: dsa: mark DSA phylink as legacy_pre_march2020

The majority of DSA drivers do not make use of the PCS support, and thus operate in legacy mode. In order to preserve this behaviour in future, we need to set the legacy_pre_march2020 flag so phylink knows this may require the legacy calls. There are some DSA drivers that do make use of PCS support, and these will continue operating as before - legacy_pre_march2020 will not prevent split-PCS support enabling the newer phylink behaviour. Signed-off-by: Russell King (Oracle) <[email protected]> Signed-off-by: Jakub Kicinski <[email protected]>
chewitt · Dec 9, 2021 · 0a9f079 · 0a9f079
1 parent 3e5b1fe
commit 0a9f079
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/net/dsa/port.c b/net/dsa/port.c
@@ -1098,6 +1098,13 @@ int dsa_port_phylink_create(struct dsa_port *dp)
 	if (err)
 		mode = PHY_INTERFACE_MODE_NA;
 
+	/* Presence of phylink_mac_link_state or phylink_mac_an_restart is
+	 * an indicator of a legacy phylink driver.
+	 */
+	if (ds->ops->phylink_mac_link_state ||
+	    ds->ops->phylink_mac_an_restart)
+		dp->pl_config.legacy_pre_march2020 = true;
+
 	if (ds->ops->phylink_get_caps)
 		ds->ops->phylink_get_caps(ds, dp->index, &dp->pl_config);