staging: fsl-dpaa2/ethsw: enable switch ports only on dev_open

At probe time, only the DPSW object should be enabled without the
associated ports, which will get enabled on dev_open. Remove the
ethsw_open() and ethsw_stop() functions and replace them only with
dpsw_enable()/_disable().
Reported-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Link: https://lore.kernel.org/r/1565700187-16048-3-git-send-email-ioana.ciornei@nxp.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/fsl-dpaa2/ethsw/ethsw.c

@@ -1363,48 +1363,6 @@ static int ethsw_register_notifier(struct device *dev)
 	return err;
 }
 
-static int ethsw_open(struct ethsw_core *ethsw)
-{
-	struct ethsw_port_priv *port_priv = NULL;
-	int i, err;
-
-	err = dpsw_enable(ethsw->mc_io, 0, ethsw->dpsw_handle);
-	if (err) {
-		dev_err(ethsw->dev, "dpsw_enable err %d\n", err);
-		return err;
-	}
-
-	for (i = 0; i < ethsw->sw_attr.num_ifs; i++) {
-		port_priv = ethsw->ports[i];
-		err = dev_open(port_priv->netdev, NULL);
-		if (err) {
-			netdev_err(port_priv->netdev, "dev_open err %d\n", err);
-			return err;
-		}
-	}
-
-	return 0;
-}
-
-static int ethsw_stop(struct ethsw_core *ethsw)
-{
-	struct ethsw_port_priv *port_priv = NULL;
-	int i, err;
-
-	for (i = 0; i < ethsw->sw_attr.num_ifs; i++) {
-		port_priv = ethsw->ports[i];
-		dev_close(port_priv->netdev);
-	}
-
-	err = dpsw_disable(ethsw->mc_io, 0, ethsw->dpsw_handle);
-	if (err) {
-		dev_err(ethsw->dev, "dpsw_disable err %d\n", err);
-		return err;
-	}
-
-	return 0;
-}
-
 static int ethsw_init(struct fsl_mc_device *sw_dev)
 {
 	struct device *dev = &sw_dev->dev;
@@ -1586,9 +1544,7 @@ static int ethsw_remove(struct fsl_mc_device *sw_dev)
 
 	destroy_workqueue(ethsw_owq);
 
-	rtnl_lock();
-	ethsw_stop(ethsw);
-	rtnl_unlock();
+	dpsw_disable(ethsw->mc_io, 0, ethsw->dpsw_handle);
 
 	for (i = 0; i < ethsw->sw_attr.num_ifs; i++) {
 		port_priv = ethsw->ports[i];
@@ -1708,12 +1664,11 @@ static int ethsw_probe(struct fsl_mc_device *sw_dev)
 			goto err_free_ports;
 	}
 
-	/* Switch starts up enabled */
-	rtnl_lock();
-	err = ethsw_open(ethsw);
-	rtnl_unlock();
-	if (err)
+	err = dpsw_enable(ethsw->mc_io, 0, ethsw->dpsw_handle);
+	if (err) {
+		dev_err(ethsw->dev, "dpsw_enable err %d\n", err);
 		goto err_free_ports;
+	}
 
 	/* Setup IRQs */
 	err = ethsw_setup_irqs(sw_dev);
@@ -1724,9 +1679,7 @@ static int ethsw_probe(struct fsl_mc_device *sw_dev)
 	return 0;
 
 err_stop:
-	rtnl_lock();
-	ethsw_stop(ethsw);
-	rtnl_unlock();
+	dpsw_disable(ethsw->mc_io, 0, ethsw->dpsw_handle);
 
 err_free_ports:
 	/* Cleanup registered ports only */