sfc: Reconfigure the XAUI serdes after an EM reset

Fix a regression introduced in d3245b28
"sfc: Refactor link configuration".
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/sfc/falcon.c

@@ -507,6 +507,9 @@ static void falcon_reset_macs(struct efx_nic *efx)
 	/* Ensure the correct MAC is selected before statistics
 	 * are re-enabled by the caller */
 	efx_writeo(efx, &mac_ctrl, FR_AB_MAC_CTRL);
+
+	/* This can run even when the GMAC is selected */
+	falcon_setup_xaui(efx);
 }
 
 void falcon_drain_tx_fifo(struct efx_nic *efx)

drivers/net/sfc/falcon_xmac.c

@@ -26,7 +26,7 @@
  *************************************************************************/
 
 /* Configure the XAUI driver that is an output from Falcon */
-static void falcon_setup_xaui(struct efx_nic *efx)
+void falcon_setup_xaui(struct efx_nic *efx)
 {
 	efx_oword_t sdctl, txdrv;
 

drivers/net/sfc/nic.h

@@ -203,6 +203,7 @@ extern void falcon_irq_ack_a1(struct efx_nic *efx);
 extern int efx_nic_flush_queues(struct efx_nic *efx);
 extern void falcon_start_nic_stats(struct efx_nic *efx);
 extern void falcon_stop_nic_stats(struct efx_nic *efx);
+extern void falcon_setup_xaui(struct efx_nic *efx);
 extern int falcon_reset_xaui(struct efx_nic *efx);
 extern void efx_nic_init_common(struct efx_nic *efx);