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net: phy: fix write to mii-ctrl1000 register

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[ Upstream commit 4cf6c57e61 ]

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: 5502b218e0 ("net: phy: use phy_resolve_aneg_linkmode in genphy_read_status")
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Russell King
2019-10-04 17:05:58 +01:00
committed by Greg Kroah-Hartman
parent ec740ada78
commit a9ab48bd6d
2 changed files with 14 additions and 0 deletions
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5
drivers/net/phy/phy.c
View File

@@ -457,6 +457,11 @@ 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;

9
include/linux/mii.h
View File

@@ -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