linux-kernel - Re: [PATCH 5/5] iio:potentiostat:lmp91000: add '\n' on dev

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Date:   Tue, 26 Feb 2019 17:15:52 -0300
From:   Lucas Oshiro <lucasseikioshiro@...il.com>
To:     Joe Perches <joe@...ches.com>, Jonathan Cameron <jic23@...nel.org>
Cc:     knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-usp@...glegroups.com,
        Anderson Reis <andersonreisrosa@...il.com>
Subject: Re: [PATCH 5/5] iio:potentiostat:lmp91000: add '\n' on dev_err

Thanks for the review!

On 20/02/2019 19:22, Joe Perches wrote:
> On Wed, 2019-02-20 at 09:49 +0000, Jonathan Cameron wrote:
>> On Mon, 18 Feb 2019 13:01:23 -0800 Joe Perches <joe@...ches.com> wrote:
>>> On Mon, 2019-02-18 at 14:22 -0300, Lucas Oshiro wrote:
>>>> Add missing '\n' at the end of dev_err message on line 215.
>>> []
>>>> diff --git a/drivers/iio/potentiostat/lmp91000.c b/drivers/iio/potentiostat/lmp91000.c
>>> []
>>>> @@ -212,7 +212,7 @@ static int lmp91000_read_config(struct lmp91000_data *data)
>>>>   	ret = of_property_read_u32(np, "ti,tia-gain-ohm", &val);
>>>>   	if (ret) {
>>>>   		if (!of_property_read_bool(np, "ti,external-tia-resistor")) {
>>>> -			dev_err(dev, "no ti,tia-gain-ohm defined");
>>>> +			dev_err(dev, "no ti,tia-gain-ohm defined\n");
>>>
>>> Perhaps a copy/paste error as the test is for
>>> external-tia-resistor and not tia-gain-ohm
>>>
>> It is an odd construct, but I think this is correct.  What it is actually
>> saying is that, given that we don't have an external resistor, we care
>> that the tia-gain-ohm isn't set (otherwise it wouldn't matter).
>>
>>  From the docs
>>    - ti,external-tia-resistor: if the property ti,tia-gain-ohm is not defined this
>>      needs to be set to signal that an external resistor value is being used.
>>
>> So, it might be ideal to say that tia-gain-ohm is not defined and we do
>> not have an external resistor specified.
>>
>> So not wrong, but could be more informative!  So perhaps a follow up patch
>> to tidy that up would be good.

So, this means that it's a good idea to change the dev_err message to something
like "no ti,tia-gain-ohm defined and external resistor not specified"?

> 
> Then thanks in advance for doing that.
> cheers, Joe
>