mfd: arizona: Add sensible return value to some error paths

There are some cases in arizona_dev_init, such as where we don't
recognise the chip ID, in which we head to the error path without
setting a sensible error code in ret. This would lead to the chip
silently failing probe, as it would still return 0. Fix this up by
adding appropriate sets of the return value.

Whilst adding these update the existing paths that do return an error
when the chip is not recognised to use ENODEV, which seems like a better
fit.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index 4fa0fae51006dc8700826a49c9b4787b3397f257..fcec650ca0884f575bd0965bf9a4dd0bf76ac8d8 100644 (file)
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -1061,7 +1061,7 @@ int arizona_dev_init(struct arizona *arizona)
        default:
                dev_err(arizona->dev, "Unknown device type %d\n",
                        arizona->type);
-               return -EINVAL;
+               return -ENODEV;
        }
 
        /* Mark DCVDD as external, LDO1 driver will clear if internal */
@@ -1147,6 +1147,7 @@ int arizona_dev_init(struct arizona *arizona)
                break;
        default:
                dev_err(arizona->dev, "Unknown device ID: %x\n", reg);
+               ret = -ENODEV;
                goto err_reset;
        }
 
@@ -1306,12 +1307,14 @@ int arizona_dev_init(struct arizona *arizona)
                break;
        default:
                dev_err(arizona->dev, "Unknown device ID %x\n", reg);
+               ret = -ENODEV;
                goto err_reset;
        }
 
        if (!subdevs) {
                dev_err(arizona->dev,
                        "No kernel support for device ID %x\n", reg);
+               ret = -ENODEV;
                goto err_reset;
        }