netdev - [net-next PATCH v2] net: gemini: Clean up phy registration

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200905204257.51044-1-linus.walleij@linaro.org>
Date:   Sat,  5 Sep 2020 22:42:57 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     netdev@...r.kernel.org, "David S . Miller" <davem@...emloft.net>
Cc:     Hans Ulli Kroll <ulli.kroll@...glemail.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andrew Lunn <andrew@...n.ch>
Subject: [net-next PATCH v2] net: gemini: Clean up phy registration

It's nice if the phy is online before we register the netdev
so try to do that first.

Stop trying to do "second tried" to register the phy, it
works perfectly fine the first time.

Stop remvoving the phy in uninit. Remove it when the
driver is remove():d, symmetric to where it is added, in
probe().

Suggested-by: Andrew Lunn <andrew@...n.ch>
Reported-by: David Miller <davem@...emloft.net>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
ChangeLog v1->v2:
- Do a deeper clean-up and remove the confusion around
  how the phy is registered.
---
 drivers/net/ethernet/cortina/gemini.c | 32 +++++++++------------------
 1 file changed, 11 insertions(+), 21 deletions(-)

diff --git a/drivers/net/ethernet/cortina/gemini.c b/drivers/net/ethernet/cortina/gemini.c
index ffec0f3dd957..94707c9dda88 100644
--- a/drivers/net/ethernet/cortina/gemini.c
+++ b/drivers/net/ethernet/cortina/gemini.c
@@ -539,12 +539,6 @@ static int gmac_init(struct net_device *netdev)
 	return 0;
 }
 
-static void gmac_uninit(struct net_device *netdev)
-{
-	if (netdev->phydev)
-		phy_disconnect(netdev->phydev);
-}
-
 static int gmac_setup_txqs(struct net_device *netdev)
 {
 	struct gemini_ethernet_port *port = netdev_priv(netdev);
@@ -1768,15 +1762,6 @@ static int gmac_open(struct net_device *netdev)
 	struct gemini_ethernet_port *port = netdev_priv(netdev);
 	int err;
 
-	if (!netdev->phydev) {
-		err = gmac_setup_phy(netdev);
-		if (err) {
-			netif_err(port, ifup, netdev,
-				  "PHY init failed: %d\n", err);
-			return err;
-		}
-	}
-
 	err = request_irq(netdev->irq, gmac_irq,
 			  IRQF_SHARED, netdev->name, netdev);
 	if (err) {
@@ -2209,7 +2194,6 @@ static void gmac_get_drvinfo(struct net_device *netdev,
 
 static const struct net_device_ops gmac_351x_ops = {
 	.ndo_init		= gmac_init,
-	.ndo_uninit		= gmac_uninit,
 	.ndo_open		= gmac_open,
 	.ndo_stop		= gmac_stop,
 	.ndo_start_xmit		= gmac_start_xmit,
@@ -2295,8 +2279,10 @@ static irqreturn_t gemini_port_irq(int irq, void *data)
 
 static void gemini_port_remove(struct gemini_ethernet_port *port)
 {
-	if (port->netdev)
+	if (port->netdev) {
+		phy_disconnect(port->netdev->phydev);
 		unregister_netdev(port->netdev);
+	}
 	clk_disable_unprepare(port->pclk);
 	geth_cleanup_freeq(port->geth);
 }
@@ -2505,6 +2491,13 @@ static int gemini_ethernet_port_probe(struct platform_device *pdev)
 	if (ret)
 		goto unprepare;
 
+	ret = gmac_setup_phy(netdev);
+	if (ret) {
+		netdev_err(netdev,
+			   "PHY init failed\n");
+		return ret;
+	}
+
 	ret = register_netdev(netdev);
 	if (ret)
 		goto unprepare;
@@ -2513,10 +2506,6 @@ static int gemini_ethernet_port_probe(struct platform_device *pdev)
 		    "irq %d, DMA @ 0x%pap, GMAC @ 0x%pap\n",
 		    port->irq, &dmares->start,
 		    &gmacres->start);
-	ret = gmac_setup_phy(netdev);
-	if (ret)
-		netdev_info(netdev,
-			    "PHY init failed, deferring to ifup time\n");
 	return 0;
 
 unprepare:
@@ -2529,6 +2518,7 @@ static int gemini_ethernet_port_remove(struct platform_device *pdev)
 	struct gemini_ethernet_port *port = platform_get_drvdata(pdev);
 
 	gemini_port_remove(port);
+
 	return 0;
 }
 
-- 
2.26.2