linux-kernel - Re: [PATCH v2 01/13] iio: accel: kxsd9: Use vsprintf extension %pe for symbolic error name

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Message-ID: <20200328141003.458b86d8@archlinux>
Date:   Sat, 28 Mar 2020 14:10:03 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Nishant Malpani <nish.malpani25@...il.com>
Cc:     andriy.shevchenko@...ux.intel.com, joe@...ches.com,
        knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 01/13] iio: accel: kxsd9: Use vsprintf extension %pe
 for symbolic error name

On Sun, 22 Mar 2020 22:53:03 +0530
Nishant Malpani <nish.malpani25@...il.com> wrote:

> Utilize %pe format specifier from vsprintf while printing error logs
> with dev_err(). Discards the use of unnecessary explicit casting and
> prints symbolic error name which might prove to be convenient during
> debugging.
> 
> Signed-off-by: Nishant Malpani <nish.malpani25@...il.com>

Applied to the togreg branch of iio.git and pushed out as testing for
the autobuilders to play with it.

Thanks,

Jonathan

> ---
> 
> Changes in v2:
>   - Rewrite commit subject line outlining the usage of %pe.
>   - Add a separator between regmap and its error name.
> 
> Based on conversations in [1] & [2].
> 
> [1] https://marc.info/?l=linux-iio&m=158427554607223&w=2
> [2] https://marc.info/?l=linux-iio&m=158481647605891&w=2
> ---
>  drivers/iio/accel/kxsd9-i2c.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/iio/accel/kxsd9-i2c.c b/drivers/iio/accel/kxsd9-i2c.c
> index 38411e1c155b..b6f3de7ef8ea 100644
> --- a/drivers/iio/accel/kxsd9-i2c.c
> +++ b/drivers/iio/accel/kxsd9-i2c.c
> @@ -21,8 +21,8 @@ static int kxsd9_i2c_probe(struct i2c_client *i2c,
>  
>  	regmap = devm_regmap_init_i2c(i2c, &config);
>  	if (IS_ERR(regmap)) {
> -		dev_err(&i2c->dev, "Failed to register i2c regmap %d\n",
> -			(int)PTR_ERR(regmap));
> +		dev_err(&i2c->dev, "Failed to register i2c regmap: %pe\n",
> +			regmap);
>  		return PTR_ERR(regmap);
>  	}
>