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| author | Yonglong Liu <liuyonglong@huawei.com> | 2019-10-16 05:30:39 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-29 11:22:01 +0300 |
| commit | 7a5c15a0a905897636933357cb5752af9b13a5a5 (patch) | |
| tree | dbc76667502eeea1675776de6f73e33a65061b97 | |
| parent | 50efedbf77433a9dc9cbc9a1c5f941499874c11d (diff) | |
| download | linux-7a5c15a0a905897636933357cb5752af9b13a5a5.tar.xz | |
net: phy: Fix "link partner" information disappear issue
[ Upstream commit 3de5ae54712c75cf3c517a288e0a704784ec6cf5 ]
Some drivers just call phy_ethtool_ksettings_set() to set the
links, for those phy drivers that use genphy_read_status(), if
autoneg is on, and the link is up, than execute "ethtool -s
ethx autoneg on" will cause "link partner" information disappear.
The call trace is phy_ethtool_ksettings_set()->phy_start_aneg()
->linkmode_zero(phydev->lp_advertising)->genphy_read_status(),
the link didn't change, so genphy_read_status() just return, and
phydev->lp_advertising is zero now.
This patch moves the clear operation of lp_advertising from
phy_start_aneg() to genphy_read_lpa()/genphy_c45_read_lpa(), and
if autoneg on and autoneg not complete, just clear what the
generic functions care about.
Fixes: 88d6272acaaa ("net: phy: avoid unneeded MDIO reads in genphy_read_status")
Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Reviewed-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/phy/phy-c45.c | 2 | ||||
| -rw-r--r-- | drivers/net/phy/phy.c | 3 | ||||
| -rw-r--r-- | drivers/net/phy/phy_device.c | 9 |
3 files changed, 10 insertions, 4 deletions
diff --git a/drivers/net/phy/phy-c45.c b/drivers/net/phy/phy-c45.c index 7935593debb1..a1caeee12236 100644 --- a/drivers/net/phy/phy-c45.c +++ b/drivers/net/phy/phy-c45.c @@ -323,6 +323,8 @@ int genphy_c45_read_pma(struct phy_device *phydev) { int val; + linkmode_zero(phydev->lp_advertising); + val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1); if (val < 0) return val; diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index 0a314cf45408..0ff8df35c779 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -566,9 +566,6 @@ int phy_start_aneg(struct phy_device *phydev) if (AUTONEG_DISABLE == phydev->autoneg) phy_sanitize_settings(phydev); - /* Invalidate LP advertising flags */ - linkmode_zero(phydev->lp_advertising); - err = phy_config_aneg(phydev); if (err < 0) goto out_unlock; diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 27ebc2c6c2d0..d6c9350b65bf 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -1823,7 +1823,14 @@ int genphy_read_status(struct phy_device *phydev) linkmode_zero(phydev->lp_advertising); - if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) { + if (phydev->autoneg == AUTONEG_ENABLE) { + if (!phydev->autoneg_complete) { + mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising, + 0); + mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0); + return 0; + } + if (phydev->is_gigabit_capable) { lpagb = phy_read(phydev, MII_STAT1000); if (lpagb < 0) |