From: Marco Hartmann <marco.hartmann@xxxxxxx>
[ Upstream commit 94acaeb50ced653bfe2c4d8037c70b107af14124 ]
Commit 34786005eca3 ("net: phy: prevent PHYs w/o Clause 22 regs from calling
genphy_config_aneg") introduced a check that aborts phy_config_aneg()
if the phy is a C45 phy.
This causes phy_state_machine() to call phy_error() so that the phy
ends up in PHY_HALTED state.
Instead of returning -EOPNOTSUPP, call genphy_c45_config_aneg()
(analogous to the C22 case) so that the state machine can run
correctly.
genphy_c45_config_aneg() closely resembles mv3310_config_aneg()
in drivers/net/phy/marvell10g.c, excluding vendor specific
configurations for 1000BaseT.
Fixes: 22b56e827093 ("net: phy: replace genphy_10g_driver with genphy_c45_driver")
Signed-off-by: Marco Hartmann <marco.hartmann@xxxxxxx>
Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/phy/phy-c45.c | 26 ++++++++++++++++++++++++++
drivers/net/phy/phy.c | 2 +-
include/linux/phy.h | 1 +
3 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/drivers/net/phy/phy-c45.c b/drivers/net/phy/phy-c45.c
index 58bb25e4af106..7935593debb11 100644
--- a/drivers/net/phy/phy-c45.c
+++ b/drivers/net/phy/phy-c45.c
@@ -523,6 +523,32 @@ int genphy_c45_read_status(struct phy_device *phydev)
}
EXPORT_SYMBOL_GPL(genphy_c45_read_status);
+/**
+ * genphy_c45_config_aneg - restart auto-negotiation or forced setup
+ * @phydev: target phy_device struct
+ *
+ * Description: If auto-negotiation is enabled, we configure the
+ * advertising, and then restart auto-negotiation. If it is not
+ * enabled, then we force a configuration.
+ */
+int genphy_c45_config_aneg(struct phy_device *phydev)
+{
+ bool changed = false;
+ int ret;
+
+ if (phydev->autoneg == AUTONEG_DISABLE)
+ return genphy_c45_pma_setup_forced(phydev);
+
+ ret = genphy_c45_an_config_aneg(phydev);
+ if (ret < 0)
+ return ret;
+ if (ret > 0)
+ changed = true;
+
+ return genphy_c45_check_and_restart_aneg(phydev, changed);
+}
+EXPORT_SYMBOL_GPL(genphy_c45_config_aneg);
+
/* The gen10g_* functions are the old Clause 45 stub */
int gen10g_config_aneg(struct phy_device *phydev)
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index e8885429293ad..57b3376877821 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -499,7 +499,7 @@ static int phy_config_aneg(struct phy_device *phydev)
* allowed to call genphy_config_aneg()
*/
if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
- return -EOPNOTSUPP;
+ return genphy_c45_config_aneg(phydev);
return genphy_config_aneg(phydev);
}
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 6424586fe2d65..7c5a9fb9c9f49 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1108,6 +1108,7 @@ int genphy_c45_an_disable_aneg(struct phy_device *phydev);
int genphy_c45_read_mdix(struct phy_device *phydev);
int genphy_c45_pma_read_abilities(struct phy_device *phydev);
int genphy_c45_read_status(struct phy_device *phydev);
+int genphy_c45_config_aneg(struct phy_device *phydev);
/* The gen10g_* functions are the old Clause 45 stub */
int gen10g_config_aneg(struct phy_device *phydev);
--
2.20.1
