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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Alexander Sverdlin <alexander.sverdlin@nokia.com>
Subject: [PATCH 4.19 190/191] staging: octeon: repair "fixed-link" support
Date:   Tue,  3 Nov 2020 21:38:02 +0100
Message-Id: <20201103203250.642773090@linuxfoundation.org>
In-Reply-To: <20201103203232.656475008@linuxfoundation.org>
References: <20201103203232.656475008@linuxfoundation.org>
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From: Alexander Sverdlin <alexander.sverdlin@nokia.com>

commit 179f5dc36b0a1aa31538d7d8823deb65c39847b3 upstream.

The PHYs must be registered once in device probe function, not in device
open callback because it's only possible to register them once.

Fixes: a25e278020bf ("staging: octeon: support fixed-link phys")
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20201016101858.11374-1-alexander.sverdlin@nokia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/staging/octeon/ethernet-mdio.c |    6 ------
 drivers/staging/octeon/ethernet.c      |    9 +++++++++
 2 files changed, 9 insertions(+), 6 deletions(-)

--- a/drivers/staging/octeon/ethernet-mdio.c
+++ b/drivers/staging/octeon/ethernet-mdio.c
@@ -152,12 +152,6 @@ int cvm_oct_phy_setup_device(struct net_
 
 	phy_node = of_parse_phandle(priv->of_node, "phy-handle", 0);
 	if (!phy_node && of_phy_is_fixed_link(priv->of_node)) {
-		int rc;
-
-		rc = of_phy_register_fixed_link(priv->of_node);
-		if (rc)
-			return rc;
-
 		phy_node = of_node_get(priv->of_node);
 	}
 	if (!phy_node)
--- a/drivers/staging/octeon/ethernet.c
+++ b/drivers/staging/octeon/ethernet.c
@@ -13,6 +13,7 @@
 #include <linux/phy.h>
 #include <linux/slab.h>
 #include <linux/interrupt.h>
+#include <linux/of_mdio.h>
 #include <linux/of_net.h>
 #include <linux/if_ether.h>
 #include <linux/if_vlan.h>
@@ -875,6 +876,14 @@ static int cvm_oct_probe(struct platform
 				break;
 			}
 
+			if (priv->of_node && of_phy_is_fixed_link(priv->of_node)) {
+				if (of_phy_register_fixed_link(priv->of_node)) {
+					netdev_err(dev, "Failed to register fixed link for interface %d, port %d\n",
+						   interface, priv->port);
+					dev->netdev_ops = NULL;
+				}
+			}
+
 			if (!dev->netdev_ops) {
 				free_netdev(dev);
 			} else if (register_netdev(dev) < 0) {