Setting the pause parameters causes a running network interface to be
restarted.  However, the restart forces the FEC into half-duplex mode,
whether or not the remote end is in half-duplex mode.  Misconfigured
duplex mode is a known source of problems on a link.

Fix this by always preserving the duplex mode on configuration changes.

Signed-off-by: Russell King <redacted>
---
 drivers/net/ethernet/freescale/fec_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 6156d423a6a9..c79d604372a4 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c

@@ -1572,7 +1572,7 @@ static int fec_enet_set_pauseparam(struct net_device *ndev,
 	if (netif_running(ndev)) {
 		napi_disable(&fep->napi);
 		netif_tx_lock_bh(ndev);
-		fec_restart(ndev, 0);
+		fec_restart(ndev, fep->full_duplex);
 		netif_wake_queue(ndev);
 		netif_tx_unlock_bh(ndev);
 		napi_enable(&fep->napi);

-- 
1.8.3.1