[PATCH v2] net: stmmac: use dev_err_probe() for reporting mdio bus registration failure

From: Rasmus Villemoes
Date: Thu Jun 02 2022 - 03:49:31 EST


I have a board where these two lines are always printed during boot:

imx-dwmac 30bf0000.ethernet: Cannot register the MDIO bus
imx-dwmac 30bf0000.ethernet: stmmac_dvr_probe: MDIO bus (id: 1) registration failed

It's perfectly fine, and the device is successfully (and silently, as
far as the console goes) probed later.

Use dev_err_probe() instead, which will demote these messages to debug
level (thus removing the alarming messages from the console) when the
error is -EPROBE_DEFER, and also has the advantage of including the
error code if/when it happens to be something other than -EPROBE_DEFER.

While here, add the missing \n to one of the format strings.

Signed-off-by: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
---
v2: Reindent following lines, fix spello in commit message, also add \n.

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 6 +++---
drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c | 2 +-
2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 3b81d4e9dc83..d1a7cf4567bc 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -7129,9 +7129,9 @@ int stmmac_dvr_probe(struct device *device,
/* MDIO bus Registration */
ret = stmmac_mdio_register(ndev);
if (ret < 0) {
- dev_err(priv->device,
- "%s: MDIO bus (id: %d) registration failed",
- __func__, priv->plat->bus_id);
+ dev_err_probe(priv->device, ret,
+ "%s: MDIO bus (id: %d) registration failed\n",
+ __func__, priv->plat->bus_id);
goto error_mdio_register;
}
}
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
index 9bc625fccca0..03d3d1f7aa4b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
@@ -482,7 +482,7 @@ int stmmac_mdio_register(struct net_device *ndev)

err = of_mdiobus_register(new_bus, mdio_node);
if (err != 0) {
- dev_err(dev, "Cannot register the MDIO bus\n");
+ dev_err_probe(dev, err, "Cannot register the MDIO bus\n");
goto bus_register_fail;
}

--
2.31.1