mdio_bus: suppress err message for reset gpio EPROBE_DEFER

The mdio_bus may have dependencies from GPIO controller and so got
deferred. Now it will print error message every time -EPROBE_DEFER is
returned which from:
__mdiobus_register()
 |-devm_gpiod_get_optional()
without actually identifying error code.

"mdio_bus 4a101000.mdio: mii_bus 4a101000.mdio couldn't get reset GPIO"

Hence, suppress error message for devm_gpiod_get_optional() returning
-EPROBE_DEFER case by using dev_err_probe().

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Link: https://lore.kernel.org/r/20201119203446.20857-1-grygorii.strashko@ti.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index e59067c..2b42e46 100644 (file)
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -546,10 +546,11 @@ int __mdiobus_register(struct mii_bus *bus, struct module *owner)
        /* de-assert bus level PHY GPIO reset */
        gpiod = devm_gpiod_get_optional(&bus->dev, "reset", GPIOD_OUT_LOW);
        if (IS_ERR(gpiod)) {
-               dev_err(&bus->dev, "mii_bus %s couldn't get reset GPIO\n",
-                       bus->id);
+               err = dev_err_probe(&bus->dev, PTR_ERR(gpiod),
+                                   "mii_bus %s couldn't get reset GPIO\n",
+                                   bus->id);
                device_del(&bus->dev);
-               return PTR_ERR(gpiod);
+               return err;
        } else  if (gpiod) {
                bus->reset_gpiod = gpiod;