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From: Lars-Peter Clausen <lars@metafoo.de>
To: Jonathan Cameron <jic23@kernel.org>,
	Dan Carpenter <dan.carpenter@oracle.com>
Cc: Bhumika Goyal <bhumirks@gmail.com>,
	devel@driverdev.osuosl.org, Michael.Hennerich@analog.com,
	linux-iio@vger.kernel.org, gregkh@linuxfoundation.org,
	linux-kernel@vger.kernel.org, pmeerw@pmeerw.net
Subject: Re: [PATCH 1/2] staging:iio:adc:added space around '-'
Date: Sun, 24 Jan 2016 18:14:53 +0100	[thread overview]
Message-ID: <56A5068D.4080207@metafoo.de> (raw)
In-Reply-To: <56A4FD7F.6010800@kernel.org>

On 01/24/2016 05:36 PM, Jonathan Cameron wrote:
> On 20/01/16 14:21, Dan Carpenter wrote:
>> On Fri, Jan 15, 2016 at 09:15:52PM +0100, Lars-Peter Clausen wrote:
>>> On 01/15/2016 08:42 PM, Bhumika Goyal wrote:
>>>> This patch adds apace around '-' operator.Found using checkpatch.pl
>>>>
>>>> Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
>>>> ---
>>>>  drivers/staging/iio/adc/ad7280a.c | 4 ++--
>>>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>>>
>>>> diff --git a/drivers/staging/iio/adc/ad7280a.c b/drivers/staging/iio/adc/ad7280a.c
>>>> index f45ebed..0c73bce 100644
>>>> --- a/drivers/staging/iio/adc/ad7280a.c
>>>> +++ b/drivers/staging/iio/adc/ad7280a.c
>>>> @@ -744,14 +744,14 @@ out:
>>>>  }
>>>>  
>>>>  static IIO_DEVICE_ATTR_NAMED(in_thresh_low_value,
>>>> -		in_voltage-voltage_thresh_low_value,
>>>> +		in_voltage - voltage_thresh_low_value,
>>>
>>> Hi,
>>>
>>> Thanks for patch. But when sending cleanup patches like this please make
>>> sure that you a) understand what the code does and how your change affects
>>> it and b) as a bare minimum of testing perform a compile test, if possible
>>> also do functional testing.
>>>
>>> The patch as it is, is neither semantically nor syntactically correct. As an
>>> exercise please make sure you understand why.
>>
>> Ugh!
>>
>> It took me a long time to figure out the bug in this patch...  Why does
>> that filename have a mix of dashes and underscores?  Too late to fix it
>> now...  :/
>>
> Very deliberately.  The - is indicating it is a differential channel!
> Literally A minus B.
> 
> It's an awfully compact representation for maths ;)
> This is obscured partly in this case as it's specifying an attribute
> shared by a set of differential channels so it's the generalization
> of
> in_voltage0-voltage1_thresh_low_value
> which does begin to slightly stretch the argument that it is nice and
> clear ;(

One thing we should maybe take a look at is making it explicit that this is
a string so it does not get picked up by checkpatch.

  reply	other threads:[~2016-01-24 17:51 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-15 19:42 [PATCH 0/2]Staging:iio:adc:add " Bhumika Goyal
2016-01-15 19:42 ` [PATCH 1/2] staging:iio:adc:added " Bhumika Goyal
2016-01-15 20:15   ` Lars-Peter Clausen
2016-01-20 14:21     ` Dan Carpenter
2016-01-24 16:36       ` Jonathan Cameron
2016-01-24 17:14         ` Lars-Peter Clausen [this message]
2016-01-30 14:12           ` Jonathan Cameron
2016-01-30 15:12             ` Dan Carpenter
2016-01-30 15:15               ` Lars-Peter Clausen
2016-01-30 17:02               ` Joe Perches
2016-01-15 19:42 ` [PATCH 2/2] staging:iio:adc:add " Bhumika Goyal

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