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| author | Russell King | 2017-03-31 11:37:07 +0200 |
|---|---|---|
| committer | David S. Miller | 2017-04-02 05:04:03 +0200 |
| commit | 83ea067fe2eae9a67c172aede6e11b9f194b1d52 (patch) | |
| tree | 10095086ecdfaf4fb333f79eb6f15bee68ce3ad3 /drivers/net/phy | |
| parent | Merge branch 'bpf-prog-testing-framework' (diff) | |
| download | kernel-qcow2-linux-83ea067fe2eae9a67c172aede6e11b9f194b1d52.tar.gz kernel-qcow2-linux-83ea067fe2eae9a67c172aede6e11b9f194b1d52.tar.xz kernel-qcow2-linux-83ea067fe2eae9a67c172aede6e11b9f194b1d52.zip | |
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy')
| -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 ba4676ee9018..7b1c93b0233a 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -1332,17 +1332,22 @@ 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); |