linux-kernel - Re: [PATCH 2/2] iio: Add driver for Murata IRS-D200

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Date:   Wed, 12 Jul 2023 17:33:09 +0200
From:   Waqar Hameed <waqar.hameed@...s.com>
To:     Jonathan Cameron <jic23@...nel.org>
CC:     Lars-Peter Clausen <lars@...afoo.de>,
        <linux-kernel@...r.kernel.org>, <linux-iio@...r.kernel.org>,
        <kernel@...s.com>
Subject: Re: [PATCH 2/2] iio: Add driver for Murata IRS-D200

On Sun, Jun 25, 2023 at 12:06 +0100 Jonathan Cameron <jic23@...nel.org> wrote:

[...]

>> >> +		dev_err(data->dev, "Could not write hp filter frequency (%d)\n",
>> >> +			ret);
>> >> +		return ret;  
>> >
>> > drop this return ret out of the if block here.
>> >
>> > In general being able to ignore possibility of ret > 0 simplifies handling.  
>> 
>> I try to be consistent and it also "helps" the next person potentially
>> adding code after the `if`-statement and forgetting about adding
>> `return`. We can drop the `return here, but then we should do the same
>> in other places with a check just before the last `return` (like
>> `irsd200_write_timer()`, `irsd200_read_nr_count()`,
>> `irsd200_write_nr_count()` and many more), right?
>
> I don't feel particulartly strongly about this, but there are scripts
> that get used to scan for this pattern to simplify the code.
>
> Sure on the other cases. I don't tend to try and label all cases of things
> pointed out, just pick on one and rely on the patch author to generalise.

I started to remove the returns but then realized that it got a little
messy. For example, in some cases we can't drop the return (side effects
after the return etc.). 

Since you didn't have any strong opinions on this, I kept them in v2.
Hope that's fine!