Merge branch 'qcom-emac-various-minor-improvements'

Timur Tabi says:

====================
net: qcom/emac: various minor improvements

A collection of minor fixes and features to the Qualcomm Technologies
EMAC network driver.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qualcomm/emac/emac-sgmii.c

@@ -297,6 +297,14 @@ static const struct of_device_id emac_sgmii_dt_match[] = {
 	{}
 };
 
+/* Dummy function for systems without an internal PHY. This avoids having
+ * to check for NULL pointers before calling the functions.
+ */
+static int emac_sgmii_dummy(struct emac_adapter *adpt)
+{
+	return 0;
+}
+
 int emac_sgmii_config(struct platform_device *pdev, struct emac_adapter *adpt)
 {
 	struct platform_device *sgmii_pdev = NULL;
@@ -311,8 +319,19 @@ int emac_sgmii_config(struct platform_device *pdev, struct emac_adapter *adpt)
 					emac_sgmii_acpi_match);
 
 		if (!dev) {
-			dev_err(&pdev->dev, "cannot find internal phy node\n");
-			return -ENODEV;
+			dev_warn(&pdev->dev, "cannot find internal phy node\n");
+			/* There is typically no internal PHY on emulation
+			 * systems, so if we can't find the node, assume
+			 * we are on an emulation system and stub-out
+			 * support for the internal PHY.  These systems only
+			 * use ACPI.
+			 */
+			phy->open = emac_sgmii_dummy;
+			phy->close = emac_sgmii_dummy;
+			phy->link_up = emac_sgmii_dummy;
+			phy->link_down = emac_sgmii_dummy;
+
+			return 0;
 		}
 
 		sgmii_pdev = to_platform_device(dev);

drivers/net/ethernet/qualcomm/emac/emac.c

@@ -683,8 +683,6 @@ static int emac_probe(struct platform_device *pdev)
 		goto err_undo_mdiobus;
 	}
 
-	emac_mac_reset(adpt);
-
 	/* set hw features */
 	netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM |
 			NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_HW_VLAN_CTAG_RX |
@@ -762,6 +760,19 @@ static int emac_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static void emac_shutdown(struct platform_device *pdev)
+{
+	struct net_device *netdev = dev_get_drvdata(&pdev->dev);
+	struct emac_adapter *adpt = netdev_priv(netdev);
+	struct emac_sgmii *sgmii = &adpt->phy;
+
+	/* Closing the SGMII turns off its interrupts */
+	sgmii->close(adpt);
+
+	/* Resetting the MAC turns off all DMA and its interrupts */
+	emac_mac_reset(adpt);
+}
+
 static struct platform_driver emac_platform_driver = {
 	.probe	= emac_probe,
 	.remove	= emac_remove,
@@ -770,6 +781,7 @@ static struct platform_driver emac_platform_driver = {
 		.of_match_table = emac_dt_match,
 		.acpi_match_table = ACPI_PTR(emac_acpi_match),
 	},
+	.shutdown = emac_shutdown,
 };
 
 module_platform_driver(emac_platform_driver);