linux-kernel - Re: [PATCH RESEND 1/3] hwmon: w83791d: convert to use devm_i2c_new_dummy

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Date:   Tue, 3 Sep 2019 12:44:15 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Wolfram Sang <wsa+renesas@...g-engineering.com>
Cc:     linux-i2c@...r.kernel.org, Marc Hulsman <m.hulsman@...elft.nl>,
        Jean Delvare <jdelvare@...e.com>, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND 1/3] hwmon: w83791d: convert to use
 devm_i2c_new_dummy_device

On Tue, Sep 03, 2019 at 08:12:54PM +0200, Wolfram Sang wrote:
> And simplify the error handling.
> 
> Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>

Applied to hwmon-next.

Thanks,
Guenter

> ---
>  drivers/hwmon/w83791d.c | 32 +++++++++-----------------------
>  1 file changed, 9 insertions(+), 23 deletions(-)
> 
> diff --git a/drivers/hwmon/w83791d.c b/drivers/hwmon/w83791d.c
> index 050ad4201691..aad8d4da5802 100644
> --- a/drivers/hwmon/w83791d.c
> +++ b/drivers/hwmon/w83791d.c
> @@ -1260,7 +1260,7 @@ static int w83791d_detect_subclients(struct i2c_client *client)
>  	struct i2c_adapter *adapter = client->adapter;
>  	struct w83791d_data *data = i2c_get_clientdata(client);
>  	int address = client->addr;
> -	int i, id, err;
> +	int i, id;
>  	u8 val;
>  
>  	id = i2c_adapter_id(adapter);
> @@ -1272,8 +1272,7 @@ static int w83791d_detect_subclients(struct i2c_client *client)
>  					"invalid subclient "
>  					"address %d; must be 0x48-0x4f\n",
>  					force_subclients[i]);
> -				err = -ENODEV;
> -				goto error_sc_0;
> +				return -ENODEV;
>  			}
>  		}
>  		w83791d_write(client, W83791D_REG_I2C_SUBADDR,
> @@ -1283,29 +1282,22 @@ static int w83791d_detect_subclients(struct i2c_client *client)
>  
>  	val = w83791d_read(client, W83791D_REG_I2C_SUBADDR);
>  	if (!(val & 0x08))
> -		data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (val & 0x7));
> +		data->lm75[0] = devm_i2c_new_dummy_device(&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(&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(&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;
>  }
>  
>  
> @@ -1394,7 +1386,7 @@ static int w83791d_probe(struct i2c_client *client,
>  	/* Register sysfs hooks */
>  	err = sysfs_create_group(&client->dev.kobj, &w83791d_group);
>  	if (err)
> -		goto error3;
> +		return err;
>  
>  	/* Check if pins of fan/pwm 4-5 are in use as GPIO */
>  	has_fanpwm45 = w83791d_read(client, W83791D_REG_GPIO) & 0x10;
> @@ -1419,9 +1411,6 @@ static int w83791d_probe(struct i2c_client *client,
>  		sysfs_remove_group(&client->dev.kobj, &w83791d_group_fanpwm45);
>  error4:
>  	sysfs_remove_group(&client->dev.kobj, &w83791d_group);
> -error3:
> -	i2c_unregister_device(data->lm75[0]);
> -	i2c_unregister_device(data->lm75[1]);
>  	return err;
>  }
>  
> @@ -1432,9 +1421,6 @@ static int w83791d_remove(struct i2c_client *client)
>  	hwmon_device_unregister(data->hwmon_dev);
>  	sysfs_remove_group(&client->dev.kobj, &w83791d_group);
>  
> -	i2c_unregister_device(data->lm75[0]);
> -	i2c_unregister_device(data->lm75[1]);
> -
>  	return 0;
>  }
>