diff options
| author | Doug Berger <opendmb@gmail.com> | 2019-11-05 11:07:26 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-05 15:37:05 +0100 |
| commit | 106f14d2ee321f0d12ae48e44f4ffb4eaba6dd72 (patch) | |
| tree | 0e42f3e48eeb81c297838fe22faacfea94ef07cb /drivers/net | |
| parent | 2acd1714d09607216529c4566571506c13d7dcba (diff) | |
net: bcmgenet: reapply manual settings to the PHY
[ Upstream commit 0686bd9d5e6863f60e4bb1e78e6fe7bb217a0890 ]
The phy_init_hw() function may reset the PHY to a configuration
that does not match manual network settings stored in the phydev
structure. If the phy state machine is polled rather than event
driven this can create a timing hazard where the phy state machine
might alter the settings stored in the phydev structure from the
value read from the BMCR.
This commit follows invocations of phy_init_hw() by the bcmgenet
driver with invocations of the genphy_config_aneg() function to
ensure that the BMCR is written to match the settings held in the
phydev structure. This prevents the risk of manual settings being
accidentally altered.
Fixes: 1c1008c793fa ("net: bcmgenet: add main driver file")
Signed-off-by: Doug Berger <opendmb@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/broadcom/genet/bcmgenet.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c index b6af286fa5c7..3e3044fe3206 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c @@ -2611,8 +2611,10 @@ static void bcmgenet_irq_task(struct work_struct *work) } if (status & UMAC_IRQ_PHY_DET_R && - priv->dev->phydev->autoneg != AUTONEG_ENABLE) + priv->dev->phydev->autoneg != AUTONEG_ENABLE) { phy_init_hw(priv->dev->phydev); + genphy_config_aneg(priv->dev->phydev); + } /* Link UP/DOWN event */ if (status & UMAC_IRQ_LINK_EVENT) @@ -3688,6 +3690,7 @@ static int bcmgenet_resume(struct device *d) phy_init_hw(priv->phydev); /* Speed settings must be restored */ + genphy_config_aneg(dev->phydev); bcmgenet_mii_config(priv->dev, false); /* disable ethernet MAC while updating its registers */ |