linux-kernel - [PATCH net] net: phy: Fix qca8081 with speeds lower than 2.5Gb/s

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Message-ID: <YfZnmMteVry/A1XR@earth.li>
Date:   Sun, 30 Jan 2022 10:25:28 +0000
From:   Jonathan McDowell <noodles@...th.li>
To:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, Luo Jie <luoj@...eaurora.org>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Robert Marko <robimarko@...il.com>
Subject: [PATCH net] net: phy: Fix qca8081 with speeds lower than 2.5Gb/s

A typo in qca808x_read_status means we try to set SMII mode on the port
rather than SGMII when the link speed is not 2.5Gb/s. This results in no
traffic due to the mismatch in configuration between the phy and the
mac.

Fixes: 79c7bc0521545 ("net: phy: add qca8081 read_status")
Signed-off-by: Jonathan McDowell <noodles@...th.li>
---
 drivers/net/phy/at803x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
index 5b6c0d120e09..7077e3a92d31 100644
--- a/drivers/net/phy/at803x.c
+++ b/drivers/net/phy/at803x.c
@@ -1691,7 +1691,7 @@ static int qca808x_read_status(struct phy_device *phydev)
 	if (phydev->link && phydev->speed == SPEED_2500)
 		phydev->interface = PHY_INTERFACE_MODE_2500BASEX;
 	else
-		phydev->interface = PHY_INTERFACE_MODE_SMII;
+		phydev->interface = PHY_INTERFACE_MODE_SGMII;
 
 	/* generate seed as a lower random value to make PHY linked as SLAVE easily,
 	 * except for master/slave configuration fault detected.
-- 
2.30.2