Re: [PATCH v2 5/6] iio: adc: ti-ads1015: use dev_err_probe() for error handling

[Jonathan Cameron <jic23@kernel.org>]

On Tue, 28 Jul 2026 00:51:01 +0530
Archit Anant <architanant5@gmail.com> wrote:

> Simplify the error handling paths in ads1015_probe() and
> ads1015_client_get_channels_config()  by converting dev_err()
> calls that are immediately followed by a return statement
> over to the modern dev_err_probe() helper.
> 
> Suggested-by: Jonathan Cameron <jic23@kernel.org>
> Signed-off-by: Archit Anant <architanant5@gmail.com>

Ah. This doesn't pick up all the places I was expecting when reviewing
previous patch.  It should definitely include the dev_err_probe()
for iio_device_register() - that won't be change just because
you move to devm_iio_device_register() in the next patch.

> ---
>  drivers/iio/adc/ti-ads1015.c | 28 ++++++++++++----------------
>  1 file changed, 12 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/iio/adc/ti-ads1015.c b/drivers/iio/adc/ti-ads1015.c
> index 59ce2f89daeb..a8dba4e5aed3 100644
> --- a/drivers/iio/adc/ti-ads1015.c
> +++ b/drivers/iio/adc/ti-ads1015.c
> @@ -883,18 +883,16 @@ static int ads1015_client_get_channels_config(struct i2c_client *client)
>  
>  		if (!fwnode_property_read_u32(node, "ti,gain", &pval)) {
>  			pga = pval;
> -			if (pga > 5) {
> -				dev_err(dev, "invalid gain on %pfw\n", node);
> -				return -EINVAL;
> -			}
> +			if (pga > 5)
> +				return dev_err_probe(dev, -EINVAL,
> +						     "invalid gain on %pfw\n", node);
>  		}
>  
>  		if (!fwnode_property_read_u32(node, "ti,datarate", &pval)) {
>  			data_rate = pval;
> -			if (data_rate > 7) {
> -				dev_err(dev, "invalid data_rate on %pfw\n", node);
> -				return -EINVAL;
> -			}
> +			if (data_rate > 7)
> +				return dev_err_probe(dev, -EINVAL,
> +						     "invalid data_rate on %pfw\n", node);
>  		}
>  
>  		data->channel_data[channel].pga = pga;
> @@ -978,18 +976,16 @@ static int ads1015_probe(struct i2c_client *client)
>  	data->regmap = devm_regmap_init_i2c(client, chip->has_comparator ?
>  					    &ads1015_regmap_config :
>  					    &tla2024_regmap_config);
> -	if (IS_ERR(data->regmap)) {
> -		dev_err(dev, "Failed to allocate register map\n");
> -		return PTR_ERR(data->regmap);
> -	}
> +	if (IS_ERR(data->regmap))
> +		return dev_err_probe(dev, PTR_ERR(data->regmap),
> +				     "Failed to allocate register map\n");
>  
>  	ret = devm_iio_triggered_buffer_setup(dev, indio_dev, NULL,
>  					      ads1015_trigger_handler,
>  					      &ads1015_buffer_setup_ops);
> -	if (ret < 0) {
> -		dev_err(dev, "iio triggered buffer setup failed\n");

Leave the switch from client->dev for this patch then we don't end up changing
same line twice.  Just add a brief comment to say you are taking advantage
of the now available local dev pointer.

> -		return ret;
> -	}
> +	if (ret < 0)
> +		return dev_err_probe(dev, ret,
> +				     "iio triggered buffer setup failed\n");
>  
>  	if (client->irq && chip->has_comparator) {
>  		unsigned long irq_trig = irq_get_trigger_type(client->irq);