diff options
| author | Russell King <rmk+kernel@armlinux.org.uk> | 2017-01-04 21:00:51 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2017-05-05 18:42:38 +0100 |
| commit | 1af90da124a9a9094030c1c743c4b6f1bab22438 (patch) | |
| tree | 5980946a23de3b6b606b108b1f9f1a517ea2429a | |
| parent | 53f262cc1787bbf5b58c5abbfa9d6317cd98157d (diff) | |
net: phy: avoid setting unsupported EEE advertisments
We currently allow userspace to set any EEE advertisments it desires,
whether or not the PHY supports them. For example:
# ethtool --set-eee eth1 advertise 0xffffffff
# ethtool --show-eee eth1
EEE Settings for eth1:
EEE status: disabled
Tx LPI: disabled
Supported EEE link modes: 100baseT/Full
1000baseT/Full
10000baseT/Full
Advertised EEE link modes: 100baseT/Full
1000baseT/Full
1000baseKX/Full
10000baseT/Full
10000baseKX4/Full
10000baseKR/Full
Clearly, this is not sane, we should only allow link modes that are
supported to be advertised (as we do elsewhere.) Ensure that we mask
the MDIO_AN_EEE_ADV value with the capabilities retrieved from the
MDIO_PCS_EEE_ABLE register.
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
| -rw-r--r-- | drivers/net/phy/phy.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index f123ffd97b27..d89df329c008 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -1364,17 +1364,22 @@ EXPORT_SYMBOL(phy_ethtool_get_eee); */ int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data) { - int val = ethtool_adv_to_mmd_eee_adv_t(data->advertised); + int cap, adv; if (!phydev->drv) return -EIO; - /* Mask prohibited EEE modes */ - val &= ~phydev->eee_broken_modes; + /* Get Supported EEE */ + cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE); + if (cap < 0) + return cap; - phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, val); + adv = ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap; - return 0; + /* Mask prohibited EEE modes */ + adv &= ~phydev->eee_broken_modes; + + return phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv); } EXPORT_SYMBOL(phy_ethtool_set_eee); |