blob: fc103fd2cb298456a281357a9ee9872fb9d80706 [file] [log] [blame]
From ff1f353bdfdaac1c2984fd50f9671831dd5c0be8 Mon Sep 17 00:00:00 2001
From: Yonglong Liu <liuyonglong@huawei.com>
Date: Wed, 16 Oct 2019 10:30:39 +0800
Subject: [PATCH] net: phy: Fix "link partner" information disappear issue
commit 3de5ae54712c75cf3c517a288e0a704784ec6cf5 upstream.
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>
[PG: use v5.3.8-stable version.]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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 3207d373a664..8487b5f47695 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -558,9 +558,6 @@ 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 54288b1b11df..5041a1f9698f 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -1787,7 +1787,14 @@ 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)
--
2.27.0