[PATCH v3 1/2] net: macb: Allow SGMII only if we are a GEM in mac_validate

This aligns mac_validate with mac_config. In mac_config, SGMII is only
enabled if macb_is_gem. Validate should care if the mac is a gem as
well.

Fixes: 7897b071ac3b ("net: macb: convert to phylink")
Signed-off-by: Sean Anderson <redacted>
---

Changes in v3:
- Order bugfix patch first

Changes in v2:
- New

 drivers/net/ethernet/cadence/macb_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 683f14665c2c..cb0f86544955 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c

@@ -528,6 +528,7 @@ static void macb_validate(struct phylink_config *config,
 
 	if (!macb_is_gem(bp) &&
 	    (state->interface == PHY_INTERFACE_MODE_GMII ||
+	     state->interface == PHY_INTERFACE_MODE_SGMII ||
 	     phy_interface_mode_is_rgmii(state->interface))) {
 		bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
 		return;

-- 
2.25.1