From: Russell King <rmk+kernel@armlinux.org.uk>
To: Andrew Lunn <andrew@lunn.ch>,
Florian Fainelli <f.fainelli@gmail.com>,
Heiner Kallweit <hkallweit1@gmail.com>,
tinywrkb <tinywrkb@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>, netdev@vger.kernel.org
Subject: [PATCH 1/4] net: phy: fix write to mii-ctrl1000 register
Date: Sun, 22 Sep 2019 12:00:10 +0100 [thread overview]
Message-ID: <E1iBzb8-00006n-4B@rmk-PC.armlinux.org.uk> (raw)
In-Reply-To: <20190922105932.GP25745@shell.armlinux.org.uk>
When userspace writes to the MII_ADVERTISE register, we update phylib's
advertising mask and trigger a renegotiation. However, writing to the
MII_CTRL1000 register, which contains the gigabit advertisement, does
neither. This can lead to phylib's copy of the advertisement becoming
de-synced with the values in the PHY register set, which can result in
incorrect negotiation resolution.
Fixes: 5502b218e001 ("net: phy: use phy_resolve_aneg_linkmode in genphy_read_status")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---
drivers/net/phy/phy.c | 5 +++++
include/linux/mii.h | 9 +++++++++
2 files changed, 14 insertions(+)
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 7af390d8bbdb..068a08a50064 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -458,6 +458,11 @@ int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
val);
change_autoneg = true;
break;
+ case MII_CTRL1000:
+ mii_ctrl1000_mod_linkmode_adv_t(phydev->advertising,
+ val);
+ change_autoneg = true;
+ break;
default:
/* do nothing */
break;
diff --git a/include/linux/mii.h b/include/linux/mii.h
index 5cd824c1c0ca..4ce8901a1af6 100644
--- a/include/linux/mii.h
+++ b/include/linux/mii.h
@@ -455,6 +455,15 @@ static inline void mii_lpa_mod_linkmode_lpa_t(unsigned long *lp_advertising,
lp_advertising, lpa & LPA_LPACK);
}
+static inline void mii_ctrl1000_mod_linkmode_adv_t(unsigned long *advertising,
+ u32 ctrl1000)
+{
+ linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, advertising,
+ ctrl1000 & ADVERTISE_1000HALF);
+ linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, advertising,
+ ctrl1000 & ADVERTISE_1000FULL);
+}
+
/**
* linkmode_adv_to_lcl_adv_t
* @advertising:pointer to linkmode advertising
--
2.7.4
next prev parent reply other threads:[~2019-09-22 11:00 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-22 10:59 [PATCH 0/4] Attempt to fix regression with AR8035 speed downgrade Russell King - ARM Linux admin
2019-09-22 11:00 ` Russell King [this message]
2019-09-22 16:33 ` [PATCH 1/4] net: phy: fix write to mii-ctrl1000 register Andrew Lunn
2019-09-22 11:00 ` [PATCH 2/4] net: phy: extract link partner advertisement reading Russell King
2019-09-22 16:35 ` Andrew Lunn
2019-09-22 11:00 ` [PATCH 3/4] net: phy: extract pause mode Russell King
2019-09-22 16:38 ` Andrew Lunn
2019-09-22 11:00 ` [PATCH 4/4] net: phy: at803x: use operating parameters from PHY-specific status Russell King
2019-09-22 16:45 ` Andrew Lunn
2019-09-22 12:56 ` [PATCH 0/4] Attempt to fix regression with AR8035 speed downgrade Russell King - ARM Linux admin
2019-09-22 15:03 ` tinywrkb
2019-09-22 16:53 ` Andrew Lunn
2019-09-22 17:52 ` Russell King - ARM Linux admin
2019-09-22 18:02 ` Florian Fainelli
2019-09-22 21:20 ` Russell King - ARM Linux admin
2019-09-25 11:48 ` David Miller
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