linux-kernel - Re: [Outreachy kernel] [PATCH 4/4] iio: light: si1145: Replace ternary operator with min macro

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Message-ID: <CALrZqyOvQjwd49q2mkfy-2=2a0bepxbCc-686+sBtrk0ABRQrA@mail.gmail.com>
Date:   Wed, 29 Mar 2017 20:23:25 +0530
From:   SIMRAN SINGHAL <singhalsimran0@...il.com>
To:     Lars-Peter Clausen <lars@...afoo.de>
Cc:     Julia Lawall <julia.lawall@...6.fr>,
        Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        outreachy-kernel <outreachy-kernel@...glegroups.com>
Subject: Re: [Outreachy kernel] [PATCH 4/4] iio: light: si1145: Replace
 ternary operator with min macro

On Wed, Mar 29, 2017 at 8:22 PM, SIMRAN SINGHAL
<singhalsimran0@...il.com> wrote:
> On Wed, Mar 29, 2017 at 6:23 PM, Lars-Peter Clausen <lars@...afoo.de> wrote:
>> On 03/29/2017 02:40 PM, Julia Lawall wrote:
>>>
>>>
>>> On Wed, 29 Mar 2017, simran singhal wrote:
>>>
>>>> Use macro min() to get the minimum of two values for brevity and
>>>> readability.
>>>>
>>>> Signed-off-by: simran singhal <singhalsimran0@...il.com>
>>>> ---
>>>>  drivers/iio/light/si1145.c | 2 +-
>>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>>
>>>> diff --git a/drivers/iio/light/si1145.c b/drivers/iio/light/si1145.c
>>>> index 096034c..e7ad6fb 100644
>>>> --- a/drivers/iio/light/si1145.c
>>>> +++ b/drivers/iio/light/si1145.c
>>>> @@ -557,7 +557,7 @@ static int si1145_set_chlist(struct iio_dev *indio_dev, unsigned long scan_mask)
>>>>      data->scan_mask = scan_mask;
>>>>      ret = si1145_param_set(data, SI1145_PARAM_CHLIST, reg);
>>>>
>>>> -    return ret < 0 ? ret : 0;
>>>> +    return min(ret, 0);
>>>
>>> A similar change involving max was already rejected.  ret < 0 is a
>>> standard way of detecting an error, so perhaps leaving that explicitly
>>> present will be preferred.
>>
>> I think a more sensible thing to do here is to check whether ret/err can
>> actually take any positive values and if not, replace the whole thing with
>> just 'return ret;' or 'return some_fn()'. I'd expect that his can be done in
>> most of the cases.
>>

Lars, I will check it and resend it.