netdev - [PATCH net-next v6 02/12] net: usb: lan78xx: remove explicit check for missing PHY driver

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Message-Id: <20250410115302.2562562-3-o.rempel@pengutronix.de>
Date: Thu, 10 Apr 2025 13:52:52 +0200
From: Oleksij Rempel <o.rempel@...gutronix.de>
To: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Woojung Huh <woojung.huh@...rochip.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	Russell King <rmk+kernel@...linux.org.uk>,
	Thangaraj Samynathan <Thangaraj.S@...rochip.com>,
	Rengarajan Sundararajan <Rengarajan.S@...rochip.com>
Cc: Oleksij Rempel <o.rempel@...gutronix.de>,
	kernel@...gutronix.de,
	linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org,
	UNGLinuxDriver@...rochip.com,
	Phil Elwell <phil@...pberrypi.org>,
	Maxime Chevallier <maxime.chevallier@...tlin.com>,
	Simon Horman <horms@...nel.org>
Subject: [PATCH net-next v6 02/12] net: usb: lan78xx: remove explicit check for missing PHY driver

RGMII timing correctness relies on the PHY providing internal delays.
This is typically ensured via PHY driver, strap pins, or PCB layout.

Explicitly checking for a PHY driver here is unnecessary and non-standard.
This logic applies to all MACs, not just LAN78xx, and should be left to
phylib, phylink, or platform configuration.

Drop the check and rely on standard subsystem behavior.

Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
---
changes v6:
- this patch is added in v6
---
 drivers/net/usb/lan78xx.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index 13b5da18850a..2876a119159c 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2543,10 +2543,6 @@ static struct phy_device *lan7801_phy_init(struct lan78xx_net *dev)
 		if (ret < 0)
 			return ERR_PTR(ret);
 	} else {
-		if (!phydev->drv) {
-			netdev_err(dev->net, "no PHY driver found\n");
-			return ERR_PTR(-EINVAL);
-		}
 		dev->interface = PHY_INTERFACE_MODE_RGMII_ID;
 		/* The PHY driver is responsible to configure proper RGMII
 		 * interface delays. Disable RGMII delays on MAC side.
-- 
2.39.5