1 files changed, 31 insertions, 12 deletions

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 2805b04d6402..09cc65c0da93 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -562,32 +562,48 @@ unsigned long phylink_get_capabilities(phy_interface_t interface,
 EXPORT_SYMBOL_GPL(phylink_get_capabilities);
 
 /**
- * phylink_generic_validate() - generic validate() callback implementation
- * @config: a pointer to a &struct phylink_config.
+ * phylink_validate_mask_caps() - Restrict link modes based on caps
  * @supported: ethtool bitmask for supported link modes.
- * @state: a pointer to a &struct phylink_link_state.
+ * @state: pointer to a &struct phylink_link_state.
+ * @mac_capabilities: bitmask of MAC capabilities
  *
- * Generic implementation of the validate() callback that MAC drivers can
- * use when they pass the range of supported interfaces and MAC capabilities.
- * This makes use of phylink_get_linkmodes().
+ * Calculate the supported link modes based on @mac_capabilities, and restrict
+ * @supported and @state based on that. Use this function if your capabiliies
+ * aren't constant, such as if they vary depending on the interface.
  */
-void phylink_generic_validate(struct phylink_config *config,
-			      unsigned long *supported,
-			      struct phylink_link_state *state)
+void phylink_validate_mask_caps(unsigned long *supported,
+				struct phylink_link_state *state,
+				unsigned long mac_capabilities)
 {
 	__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
 	unsigned long caps;
 
 	phylink_set_port_modes(mask);
 	phylink_set(mask, Autoneg);
-	caps = phylink_get_capabilities(state->interface,
-					config->mac_capabilities,
+	caps = phylink_get_capabilities(state->interface, mac_capabilities,
 					state->rate_matching);
 	phylink_caps_to_linkmodes(mask, caps);
 
 	linkmode_and(supported, supported, mask);
 	linkmode_and(state->advertising, state->advertising, mask);
 }
+EXPORT_SYMBOL_GPL(phylink_validate_mask_caps);
+
+/**
+ * phylink_generic_validate() - generic validate() callback implementation
+ * @config: a pointer to a &struct phylink_config.
+ * @supported: ethtool bitmask for supported link modes.
+ * @state: a pointer to a &struct phylink_link_state.
+ *
+ * Generic implementation of the validate() callback that MAC drivers can
+ * use when they pass the range of supported interfaces and MAC capabilities.
+ */
+void phylink_generic_validate(struct phylink_config *config,
+			      unsigned long *supported,
+			      struct phylink_link_state *state)
+{
+	phylink_validate_mask_caps(supported, state, config->mac_capabilities);
+}
 EXPORT_SYMBOL_GPL(phylink_generic_validate);
 
 static int phylink_validate_mac_and_pcs(struct phylink *pl,
@@ -633,7 +649,10 @@ static int phylink_validate_mac_and_pcs(struct phylink *pl,
 	}
 
 	/* Then validate the link parameters with the MAC */
-	pl->mac_ops->validate(pl->config, supported, state);
+	if (pl->mac_ops->validate)
+		pl->mac_ops->validate(pl->config, supported, state);
+	else
+		phylink_generic_validate(pl->config, supported, state);
 
 	return phylink_is_empty_linkmode(supported) ? -EINVAL : 0;
 }