[PATCH v3 2/3] net: phy: restart phy autonegotiation after EEE advertisment change
From: Russell King <hidden>
Date: 2017-03-31 09:37:25
Subsystem:
ethernet phy library, networking drivers, the rest · Maintainers:
Andrew Lunn, Heiner Kallweit, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
When the EEE advertisment is changed, we should restart autonegotiation to update the link partner with the new EEE settings. Add this trigger but only if the advertisment has changed. Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Russell King <redacted> --- drivers/net/phy/phy.c | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-)
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 7b1c93b0233a..345251f21699 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c@@ -1332,7 +1332,7 @@ EXPORT_SYMBOL(phy_ethtool_get_eee); */ int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data) { - int cap, adv; + int cap, old_adv, adv, ret; if (!phydev->drv) return -EIO;
@@ -1342,12 +1342,29 @@ int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data) if (cap < 0) return cap; + old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV); + if (old_adv < 0) + return old_adv; + adv = ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap; /* Mask prohibited EEE modes */ adv &= ~phydev->eee_broken_modes; - return phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv); + if (old_adv != adv) { + ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv); + if (ret < 0) + return ret; + + /* Restart autonegotiation so the new modes get sent to the + * link partner. + */ + ret = genphy_restart_aneg(phydev); + if (ret < 0) + return ret; + } + + return 0; } EXPORT_SYMBOL(phy_ethtool_set_eee);
--
2.7.4