Re: [PATCH] iio: accel: bma400: Switch to use dev_err_probe() helper

[Jonathan Cameron <jic23@kernel.org>]

On Wed, 21 Sep 2022 02:39:15 +0000
Yuan Can <yuancan@huawei.com> wrote:

> In the probe path, dev_err() can be replace with dev_err_probe()
> which will check if error code is -EPROBE_DEFER and prints the
> error name.
> 
> Signed-off-by: Yuan Can <yuancan@huawei.com>

@Dan.  whilst reviewing this one I noticed we are turning the power to vddio (which
I assume is the supply for the IO interface) after reading the chip ID. That
doesn't seem right!

Unrelated to this patch beyond I was looking to see if there were other cases
for dev_err_probe() in here.

Applied but it may well not make the next merge window as I'm not sure I'll get
another IIO pull request out before that opens.  Currently Linus has hinted
at a possible rc8 but we will know more on that after he tags rc7 tomorrow.

Jonathan

> ---
>  drivers/iio/accel/bma400_core.c | 10 +++-------
>  1 file changed, 3 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/iio/accel/bma400_core.c b/drivers/iio/accel/bma400_core.c
> index eceb1f8d338d..cebd7e370b09 100644
> --- a/drivers/iio/accel/bma400_core.c
> +++ b/drivers/iio/accel/bma400_core.c
> @@ -886,14 +886,10 @@ static int bma400_init(struct bma400_data *data)
>  	ret = devm_regulator_bulk_get(data->dev,
>  				      ARRAY_SIZE(data->regulators),
>  				      data->regulators);
> -	if (ret) {
> -		if (ret != -EPROBE_DEFER)
> -			dev_err(data->dev,
> -				"Failed to get regulators: %d\n",
> -				ret);
> +	if (ret)
> +		return dev_err_probe(data->dev, ret, "Failed to get regulators: %d\n",
> +				     ret);
>  
> -		return ret;
> -	}
>  	ret = regulator_bulk_enable(ARRAY_SIZE(data->regulators),
>  				    data->regulators);
>  	if (ret) {