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authorDoug Berger <opendmb@gmail.com>2019-11-05 22:07:26 +0300
committerDavid S. Miller <davem@davemloft.net>2019-11-06 21:46:22 +0300
commit0686bd9d5e6863f60e4bb1e78e6fe7bb217a0890 (patch)
treeb4ced329bbfcdbd29852a52d6ddb1072c9cd42ac /drivers/net
parent6b6d017fccb4693767d2fcae9ef2fd05243748bb (diff)
downloadlinux-0686bd9d5e6863f60e4bb1e78e6fe7bb217a0890.tar.xz
net: bcmgenet: reapply manual settings to the PHY
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>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/broadcom/genet/bcmgenet.c5
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 b5255dd08265..1de51811fcb4 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -2612,8 +2612,10 @@ static void bcmgenet_irq_task(struct work_struct *work)
spin_unlock_irq(&priv->lock);
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)
@@ -3634,6 +3636,7 @@ static int bcmgenet_resume(struct device *d)
phy_init_hw(dev->phydev);
/* Speed settings must be restored */
+ genphy_config_aneg(dev->phydev);
bcmgenet_mii_config(priv->dev, false);
bcmgenet_set_hw_addr(priv, dev->dev_addr);