[PATCH] mdio_bus: suppress err message for reset gpio EPROBE_DEFER

[Grygorii Strashko]

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 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 when devm_gpiod_get_optional() returning
-EPROBE_DEFER case.

Signed-off-by: Grygorii Strashko <grygorii.stras...@ti.com>
---
 drivers/net/phy/mdio_bus.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 757e950fb745..54fc13043656 100644
--- 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 = PTR_ERR(gpiod);
+               if (err != -EPROBE_DEFER)
+                       dev_err(&bus->dev, "mii_bus %s couldn't get reset GPIO 
%d\n", bus->id, err);
                device_del(&bus->dev);
-               return PTR_ERR(gpiod);
+               return err;
        } else  if (gpiod) {
                bus->reset_gpiod = gpiod;
 
-- 
2.17.1