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

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Date:   Sun, 3 Mar 2019 16:49:18 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Lucas Oshiro <lucasseikioshiro@...il.com>
Cc:     Joe Perches <joe@...ches.com>, 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

On Tue, 26 Feb 2019 17:15:52 -0300
Lucas Oshiro <lucasseikioshiro@...il.com> wrote:

> 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"?

Exactly.  Thanks,

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