hwmon: (w83792d) convert to use devm_i2c_new_dummy_device

And simplify the error handling.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20190903181256.13450-3-wsa+renesas@sang-engineering.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/w83792d.c b/drivers/hwmon/w83792d.c
index da8a6d6..7fc8a11 100644 (file)
--- a/drivers/hwmon/w83792d.c
+++ b/drivers/hwmon/w83792d.c
@@ -924,7 +924,7 @@ store_sf2_level(struct device *dev, struct device_attribute *attr,
 static int
 w83792d_detect_subclients(struct i2c_client *new_client)
 {
-       int i, id, err;
+       int i, id;
        int address = new_client->addr;
        u8 val;
        struct i2c_adapter *adapter = new_client->adapter;
@@ -938,8 +938,7 @@ w83792d_detect_subclients(struct i2c_client *new_client)
                                dev_err(&new_client->dev,
                                        "invalid subclient address %d; must be 0x48-0x4f\n",
                                        force_subclients[i]);
-                               err = -ENODEV;
-                               goto ERROR_SC_0;
+                               return -ENODEV;
                        }
                }
                w83792d_write_value(new_client, W83792D_REG_I2C_SUBADDR,
@@ -949,28 +948,21 @@ w83792d_detect_subclients(struct i2c_client *new_client)
 
        val = w83792d_read_value(new_client, W83792D_REG_I2C_SUBADDR);
        if (!(val & 0x08))
-               data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (val & 0x7));
+               data->lm75[0] = devm_i2c_new_dummy_device(&new_client->dev, adapter,
+                                                         0x48 + (val & 0x7));
        if (!(val & 0x80)) {
-               if ((data->lm75[0] != NULL) &&
+               if (!IS_ERR(data->lm75[0]) &&
                        ((val & 0x7) == ((val >> 4) & 0x7))) {
                        dev_err(&new_client->dev,
                                "duplicate addresses 0x%x, use force_subclient\n",
                                data->lm75[0]->addr);
-                       err = -ENODEV;
-                       goto ERROR_SC_1;
+                       return -ENODEV;
                }
-               data->lm75[1] = i2c_new_dummy(adapter,
-                                             0x48 + ((val >> 4) & 0x7));
+               data->lm75[1] = devm_i2c_new_dummy_device(&new_client->dev, adapter,
+                                                         0x48 + ((val >> 4) & 0x7));
        }
 
        return 0;
-
-/* Undo inits in case of errors */
-
-ERROR_SC_1:
-       i2c_unregister_device(data->lm75[0]);
-ERROR_SC_0:
-       return err;
 }
 
 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
@@ -1396,7 +1388,7 @@ w83792d_probe(struct i2c_client *client, const struct i2c_device_id *id)
        /* Register sysfs hooks */
        err = sysfs_create_group(&dev->kobj, &w83792d_group);
        if (err)
-               goto exit_i2c_unregister;
+               return err;
 
        /*
         * Read GPIO enable register to check if pins for fan 4,5 are used as
@@ -1441,9 +1433,6 @@ exit_remove_files:
        sysfs_remove_group(&dev->kobj, &w83792d_group);
        for (i = 0; i < ARRAY_SIZE(w83792d_group_fan); i++)
                sysfs_remove_group(&dev->kobj, &w83792d_group_fan[i]);
-exit_i2c_unregister:
-       i2c_unregister_device(data->lm75[0]);
-       i2c_unregister_device(data->lm75[1]);
        return err;
 }
 
@@ -1459,9 +1448,6 @@ w83792d_remove(struct i2c_client *client)
                sysfs_remove_group(&client->dev.kobj,
                                   &w83792d_group_fan[i]);
 
-       i2c_unregister_device(data->lm75[0]);
-       i2c_unregister_device(data->lm75[1]);
-
        return 0;
 }