phy: fixed-phy: properly validate phy in fixed_phy_update_state()

Validate that the phy_device passed into fixed_phy_update_state() is a
fixed-phy device before walking the list of phys for a fixed phy at the
same address.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c
index fb1299c6326ec1f388d5c544e4607645274cbb08..e23bf5b90e17325060f4e4900b66ac2c086ec6dd 100644 (file)
--- a/drivers/net/phy/fixed_phy.c
+++ b/drivers/net/phy/fixed_phy.c
@@ -220,7 +220,7 @@ int fixed_phy_update_state(struct phy_device *phydev,
        struct fixed_mdio_bus *fmb = &platform_fmb;
        struct fixed_phy *fp;
 
-       if (!phydev || !phydev->bus)
+       if (!phydev || phydev->bus != fmb->mii_bus)
                return -EINVAL;
 
        list_for_each_entry(fp, &fmb->phys, node) {