The iMX6 gigabit FEC does not support half-duplex gigabit operation.
Phys attacked to the FEC may support this, and we currently do nothing
to disable this feature.  This may result in an invalid configuration.
Mask out phy support for gigabit half-duplex operation.

Signed-off-by: Russell King <redacted>
---
 drivers/net/ethernet/freescale/fec_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 77037fd377b8..a91fe68030e6 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c

@@ -1667,6 +1667,7 @@ static int fec_enet_mii_probe(struct net_device *ndev)
 	/* mask with MAC supported features */
 	if (id_entry->driver_data & FEC_QUIRK_HAS_GBIT) {
 		phy_dev->supported &= PHY_GBIT_FEATURES;
+		phy_dev->supported &= ~SUPPORTED_1000baseT_Half;
 #if !defined(CONFIG_M5272)
 		phy_dev->supported |= SUPPORTED_Pause;
 #endif

-- 
1.8.3.1