[PATCH net-next v6 2/7] net: stmmac: Add dedicated XPCS cleanup method

Romain Gantois
2024-05-10T07:37:41Z

From: Serge Semin <fancer.lancer@gmail.com>

Currently the XPCS handler destruction is performed in the
stmmac_mdio_unregister() method. It doesn't look good because the handler
isn't originally created in the corresponding protagonist
stmmac_mdio_unregister(), but in the stmmac_xpcs_setup() function. In
order to have more coherent MDIO and XPCS setup/cleanup procedures,
let's move the DW XPCS destruction to the dedicated stmmac_pcs_clean()
method.

This method will also be used to cleanup PCS hardware using the
pcs_exit() callback that will be introduced to stmmac in a subsequent
patch.

Signed-off-by: Serge Semin <fancer.lancer@gmail.com>
Co-developed-by: Romain Gantois <romain.gantois@bootlin.com>
Signed-off-by: Romain Gantois <romain.gantois@bootlin.com>
---
drivers/net/ethernet/stmicro/stmmac/stmmac.h | 1 +
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 6 +++++-
drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c | 14 +++++++++++---
3 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
index dddcaa9220cc3..badfe686a5702 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
@@ -361,6 +361,7 @@ int stmmac_mdio_unregister(struct net_device *ndev);
int stmmac_mdio_register(struct net_device *ndev);
int stmmac_mdio_reset(struct mii_bus *mii);
int stmmac_xpcs_setup(struct mii_bus *mii);
+void stmmac_pcs_clean(struct net_device *ndev);
void stmmac_set_ethtool_ops(struct net_device *netdev);

int stmmac_init_tstamp_counter(struct stmmac_priv *priv, u32 systime_flags);
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 3d828904db0d3..0ac99c132733d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -7789,8 +7789,9 @@ int stmmac_dvr_probe(struct device *device,

error_netdev_register:
phylink_destroy(priv->phylink);
-error_xpcs_setup:
error_phy_setup:
+ stmmac_pcs_clean(ndev);
+error_xpcs_setup:
if (priv->hw->pcs != STMMAC_PCS_TBI &&
priv->hw->pcs != STMMAC_PCS_RTBI)
stmmac_mdio_unregister(ndev);
@@ -7832,6 +7833,9 @@ void stmmac_dvr_remove(struct device *dev)
if (priv->plat->stmmac_rst)
reset_control_assert(priv->plat->stmmac_rst);
reset_control_assert(priv->plat->stmmac_ahb_rst);
+
+ stmmac_pcs_clean(ndev);
+
if (priv->hw->pcs != STMMAC_PCS_TBI &&
priv->hw->pcs != STMMAC_PCS_RTBI)
stmmac_mdio_unregister(ndev);
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
index 0542cfd1817e6..73ba9901a4439 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
@@ -523,6 +523,17 @@ int stmmac_xpcs_setup(struct mii_bus *bus)
return 0;
}

+void stmmac_pcs_clean(struct net_device *ndev)
+{
+ struct stmmac_priv *priv = netdev_priv(ndev);
+
+ if (!priv->hw->xpcs)
+ return;
+
+ xpcs_destroy(priv->hw->xpcs);
+ priv->hw->xpcs = NULL;
+}
+
/**
* stmmac_mdio_register
* @ndev: net device structure
@@ -679,9 +690,6 @@ int stmmac_mdio_unregister(struct net_device *ndev)
if (!priv->mii)
return 0;

- if (priv->hw->xpcs)
- xpcs_destroy(priv->hw->xpcs);
-
mdiobus_unregister(priv->mii);
priv->mii->priv = NULL;
mdiobus_free(priv->mii);

--
2.44.0