linux-kernel - Re: [PATCH] hwmon: (oxp-sensors) Add AYANEO 2 and Geek models

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Date:   Thu, 27 Apr 2023 21:05:31 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Joaquin Aramendia <samsagax@...il.com>
Cc:     derekjohn.clark@...il.com, jdelvare@...e.com,
        linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] hwmon: (oxp-sensors) Add AYANEO 2 and Geek models

On 4/27/23 16:16, Joaquin Aramendia wrote:
> Hello Guenter and thanks for your quick review.
> 
>> Please run checkpatch --strict on your patches. Never mind, I'll apply the
>> patch anyway - I see the other entries are the same.
> I've run it before on the other patches... did something change in the
> checkpatch?
> Nevermid, After this one I may submit a patch to fix all styling in one go
> 
>> That makes me have a closer look at the code. What is the purpose of the
>> odd typecast anyway ? Why not just
>>          .driver_data = (void *)aya_neo_2,
>> and
>>          board = (enum oxp_board)dmi_entry->driver_data;
>> ?
> I don't know why but the compiler would complain with the casting from
> enum to void*.

Really ? I tried with both 32 bit and 64 bit targets, and the above worked
just fine (with W=1). I tried with gcc 10.3 as well as 11.3. What is
your compiler version, what exactly is the warning/error message you
observed, and how exactly did your code look like ?

> Found out that explicitly casting the enum literal before casting it
> to void* works and
> the compiler stopped complaining so I went with it.
> 

You are not casting the enum literal, but a pointer to it.

Guenter

> As a follow up question, since this driver has become more AYANEO than
> OXP since its inception,
>   wouldn't  it be better to change the description?
> 
> Joaquín Aramendía