1 files changed, 29 insertions, 11 deletions

diff --git a/net/dsa/port.c b/net/dsa/port.c
index 208168276995..67ad1adec2a2 100644
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -12,7 +12,11 @@
 #include <linux/of_mdio.h>
 #include <linux/of_net.h>
 
-#include "dsa_priv.h"
+#include "dsa.h"
+#include "port.h"
+#include "slave.h"
+#include "switch.h"
+#include "tag_8021q.h"
 
 /**
  * dsa_port_notify - Notify the switching fabric of changes to a port
@@ -110,6 +114,22 @@ static bool dsa_port_can_configure_learning(struct dsa_port *dp)
 	return !err;
 }
 
+bool dsa_port_supports_hwtstamp(struct dsa_port *dp, struct ifreq *ifr)
+{
+	struct dsa_switch *ds = dp->ds;
+	int err;
+
+	if (!ds->ops->port_hwtstamp_get || !ds->ops->port_hwtstamp_set)
+		return false;
+
+	/* "See through" shim implementations of the "get" method.
+	 * This will clobber the ifreq structure, but we will either return an
+	 * error, or the master will overwrite it with proper values.
+	 */
+	err = ds->ops->port_hwtstamp_get(ds, dp->index, ifr);
+	return err != -EOPNOTSUPP;
+}
+
 int dsa_port_set_state(struct dsa_port *dp, u8 state, bool do_fast_age)
 {
 	struct dsa_switch *ds = dp->ds;
@@ -1536,16 +1556,14 @@ static void dsa_port_phylink_validate(struct phylink_config *config,
 				      unsigned long *supported,
 				      struct phylink_link_state *state)
 {
-	struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
-	struct dsa_switch *ds = dp->ds;
-
-	if (!ds->ops->phylink_validate) {
-		if (config->mac_capabilities)
-			phylink_generic_validate(config, supported, state);
-		return;
-	}
-
-	ds->ops->phylink_validate(ds, dp->index, supported, state);
+	/* Skip call for drivers which don't yet set mac_capabilities,
+	 * since validating in that case would mean their PHY will advertise
+	 * nothing. In turn, skipping validation makes them advertise
+	 * everything that the PHY supports, so those drivers should be
+	 * converted ASAP.
+	 */
+	if (config->mac_capabilities)
+		phylink_generic_validate(config, supported, state);
 }
 
 static void dsa_port_phylink_mac_pcs_get_state(struct phylink_config *config,