Commit 6ed74236 authored Jan 26, 2016 by Andrew Lunn Committed by David S. Miller Jan 28, 2016

of: of_mdio: Ensure mdio device is a PHY



of_phy_find_device() is used to find the phy device associated with a
device node. It is expected the node is for a PHY device, but in fact
it could of been probed as a generic MDIO device. Ensure the device is
a PHY before returning it.

Fixes: a9049e0c ("mdio: Add support for mdio drivers.")
Reported-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Reported-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent bd7c5e31

drivers/of/of_mdio.c

+9 −1

Original line number	Diff line number	Diff line
		@@ -256,11 +256,19 @@ static int of_phy_match(struct device dev, void phy_np)
		struct phy_device of_phy_find_device(struct device_node phy_np)
		{
		struct device *d;
		struct mdio_device *mdiodev;

		if (!phy_np)
		return NULL;

		d = bus_find_device(&mdio_bus_type, NULL, phy_np, of_phy_match);
		return d ? to_phy_device(d) : NULL;
		if (d) {
		mdiodev = to_mdio_device(d);
		if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)
		return to_phy_device(d);
		}

		return NULL;
		}
		EXPORT_SYMBOL(of_phy_find_device);