net: mdio-gpio: warn about missing bus alias id

Use a sane default bus id (rather than -ENODEV) and print a warning when
the bus alias id is missing.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/phy/mdio-gpio.c b/drivers/net/phy/mdio-gpio.c
index 9c4defdec67b..5f1a2250018f 100644
--- a/drivers/net/phy/mdio-gpio.c
+++ b/drivers/net/phy/mdio-gpio.c
@@ -215,6 +215,10 @@ static int mdio_gpio_probe(struct platform_device *pdev)
         if (pdev->dev.of_node) {
                 pdata = mdio_gpio_of_get_data(pdev);
                 bus_id = of_alias_get_id(pdev->dev.of_node, "mdio-gpio");
+                if (bus_id < 0) {
+                        dev_warn(&pdev->dev, "failed to get alias id\n");
+                        bus_id = 0;
+                }
         } else {
                 pdata = dev_get_platdata(&pdev->dev);
                 bus_id = pdev->id;