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Date:	Wed, 27 Aug 2014 11:44:33 -0700
From:	Florian Fainelli <>
Cc:, Florian Fainelli <>
Subject: [PATCH net-next] net: phy: properly report internal PHYs through sysfs

Internal PHYs may not have a valid PHY interface defined, which will
show up in sysfs as "". Add an explicit check of internal PHYs to report
their interface correctly.

Fixes: 3d055d8d1c24 ("net: phy: expose PHY device interface mode")
Signed-off-by: Florian Fainelli <>
 drivers/net/phy/mdio_bus.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 4eaadcfcb0fe..50051f271b10 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -553,8 +553,14 @@ static ssize_t
 phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf)
 	struct phy_device *phydev = to_phy_device(dev);
+	const char *mode = NULL;
-	return sprintf(buf, "%s\n", phy_modes(phydev->interface));
+	if (phy_is_internal(phydev))
+		mode = "internal";
+	else
+		mode = phy_modes(phydev->interface);
+	return sprintf(buf, "%s\n", mode);
 static DEVICE_ATTR_RO(phy_interface);

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