[PATCH net-next] net: bcmasp: handle EPROBE_DEFER for MAC retrieval

[Rosen Penev <rosenp@gmail.com>]

of_get_ethdev_address can return EPROBE_DEFER when using nvmem. To
handle this, encode the error with ERR_PTR for minimal changes. Adjust
the only place using bcmasp_interface_create.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/net/ethernet/broadcom/asp2/bcmasp.c      | 4 ++--
 drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c | 6 ++++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/asp2/bcmasp.c b/drivers/net/ethernet/broadcom/asp2/bcmasp.c
index 972474893a6b..31a9560c4aee 100644
--- a/drivers/net/ethernet/broadcom/asp2/bcmasp.c
+++ b/drivers/net/ethernet/broadcom/asp2/bcmasp.c
@@ -1333,10 +1333,10 @@ static int bcmasp_probe(struct platform_device *pdev)
 	i = 0;
 	for_each_available_child_of_node_scoped(ports_node, intf_node) {
 		intf = bcmasp_interface_create(priv, intf_node, i);
-		if (!intf) {
+		if (IS_ERR(intf)) {
 			dev_err(dev, "Cannot create eth interface %d\n", i);
 			of_node_put(ports_node);
-			ret = -EINVAL;
+			ret = PTR_ERR(intf);
 			goto err_cleanup;
 		}
 		list_add_tail(&intf->list, &priv->intfs);
diff --git a/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c b/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c
index ec63f50a849e..caf0e408e2f7 100644
--- a/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c
+++ b/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c
@@ -1254,7 +1254,7 @@ struct bcmasp_intf *bcmasp_interface_create(struct bcmasp_priv *priv,
 	struct device *dev = &priv->pdev->dev;
 	struct bcmasp_intf *intf;
 	struct net_device *ndev;
-	int ch, port, ret;
+	int ch, port, ret = -EINVAL;

 	if (of_property_read_u32(ndev_dn, "reg", &port)) {
 		dev_warn(dev, "%s: invalid port number\n", ndev_dn->name);
@@ -1314,6 +1314,8 @@ struct bcmasp_intf *bcmasp_interface_create(struct bcmasp_priv *priv,
 	}

 	ret = of_get_ethdev_address(ndev_dn, ndev);
+	if (ret == -EPROBE_DEFER)
+		return ERR_PTR(-EPROBE_DEFER);
 	if (ret) {
 		netdev_warn(ndev, "using random Ethernet MAC\n");
 		eth_hw_addr_random(ndev);
@@ -1340,7 +1342,7 @@ struct bcmasp_intf *bcmasp_interface_create(struct bcmasp_priv *priv,
 err_free_netdev:
 	free_netdev(ndev);
 err:
-	return NULL;
+	return ERR_PTR(ret);
 }

 void bcmasp_interface_destroy(struct bcmasp_intf *intf)
--
2.54.0