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net: phy: avoid genphy_aneg_done() for PHYs without clause 22 support

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Avoid calling genphy_aneg_done() for PHYs that do not implement the
Clause 22 register set.

Clause 45 PHYs may implement the Clause 22 register set along with the
Clause 22 extension MMD.  Hence, we can't simply block access to the
Clause 22 functions based on the PHY being a Clause 45 PHY.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Russell King 2017-06-05 12:22:55 +01:00 committed by David S. Miller
parent 5acde34a5a
commit 41408ad519
1 changed files with 6 additions and 0 deletions
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6
drivers/net/phy/phy.c
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@ -163,6 +163,12 @@ int phy_aneg_done(struct phy_device *phydev)
if (phydev->drv && phydev->drv->aneg_done)
return phydev->drv->aneg_done(phydev);
/* Avoid genphy_aneg_done() if the Clause 45 PHY does not
* implement Clause 22 registers
*/
if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
return -EINVAL;
return genphy_aneg_done(phydev);
}
EXPORT_SYMBOL(phy_aneg_done);