linux-kernel - Re: [PATCH 1/3] iio: accel: mma8452: Use dev_err

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Date:   Sun, 16 Aug 2020 09:54:11 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Anson Huang <Anson.Huang@....com>
Cc:     knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
        alexandru.ardelean@...log.com, hslester96@...il.com,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Linux-imx@....com
Subject: Re: [PATCH 1/3] iio: accel: mma8452: Use dev_err_probe() to
 simplify error handling

On Tue, 11 Aug 2020 11:43:14 +0800
Anson Huang <Anson.Huang@....com> wrote:

> dev_err_probe() can reduce code size, uniform error handling and record the
> defer probe reason etc., use it to simplify the code.
> 
> Signed-off-by: Anson Huang <Anson.Huang@....com>
Hi Anson,

All look good, but will have to wait for dev_err_probe to be in my
upstream tree which hasn't quite happened yet.  Give me a poke if 
I seem to have lost these once that is true!

Thanks,

Jonathan

> ---
>  drivers/iio/accel/mma8452.c | 20 ++++++--------------
>  1 file changed, 6 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
> index ba27f86..9b5f23b 100644
> --- a/drivers/iio/accel/mma8452.c
> +++ b/drivers/iio/accel/mma8452.c
> @@ -1538,22 +1538,14 @@ static int mma8452_probe(struct i2c_client *client,
>  	data->chip_info = match->data;
>  
>  	data->vdd_reg = devm_regulator_get(&client->dev, "vdd");
> -	if (IS_ERR(data->vdd_reg)) {
> -		if (PTR_ERR(data->vdd_reg) == -EPROBE_DEFER)
> -			return -EPROBE_DEFER;
> -
> -		dev_err(&client->dev, "failed to get VDD regulator!\n");
> -		return PTR_ERR(data->vdd_reg);
> -	}
> +	if (IS_ERR(data->vdd_reg))
> +		return dev_err_probe(&client->dev, PTR_ERR(data->vdd_reg),
> +				     "failed to get VDD regulator!\n");
>  
>  	data->vddio_reg = devm_regulator_get(&client->dev, "vddio");
> -	if (IS_ERR(data->vddio_reg)) {
> -		if (PTR_ERR(data->vddio_reg) == -EPROBE_DEFER)
> -			return -EPROBE_DEFER;
> -
> -		dev_err(&client->dev, "failed to get VDDIO regulator!\n");
> -		return PTR_ERR(data->vddio_reg);
> -	}
> +	if (IS_ERR(data->vddio_reg))
> +		return dev_err_probe(&client->dev, PTR_ERR(data->vddio_reg),
> +				     "failed to get VDDIO regulator!\n");
>  
>  	ret = regulator_enable(data->vdd_reg);
>  	if (ret) {