linux-kernel - Re: [PATCH v1 01/12] gna: add driver module

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Date:   Tue, 09 Mar 2021 19:26:44 +0100
From:   Maciej Kwapulinski <maciej.kwapulinski@...ux.intel.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Arnd Bergmann <arnd@...db.de>, Jonathan Corbet <corbet@....net>,
        Derek Kiernan <derek.kiernan@...inx.com>,
        Dragan Cvetic <dragan.cvetic@...inx.com>,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        Tomasz Jankowski <tomasz1.jankowski@...el.com>,
        Savo Novakovic <savox.novakovic@...el.com>,
        Jianxun Zhang <jianxun.zhang@...ux.intel.com>
Subject: Re: [PATCH v1 01/12] gna: add driver module


Greg Kroah-Hartman <gregkh@...uxfoundation.org> writes:

> On Fri, Feb 26, 2021 at 01:59:14PM +0100, Maciej Kwapulinski wrote:
>> 
>> Greg Kroah-Hartman <gregkh@...uxfoundation.org> writes:
>> 
>> > On Tue, Feb 16, 2021 at 05:05:14PM +0100, Maciej Kwapulinski wrote:
>> ....
>> >> --- /dev/null
>> >> +++ b/drivers/misc/gna/gna_driver.h
>> >> @@ -0,0 +1,41 @@
>> >> +/* SPDX-License-Identifier: GPL-2.0-only */
>> >> +/* Copyright(c) 2017-2021 Intel Corporation */
>> >> +
>> >> +#ifndef __GNA_DRIVER_H__
>> >> +#define __GNA_DRIVER_H__
>> >> +
>> >> +#include <linux/kernel.h>
>> >> +#include <linux/mutex.h>
>> >> +#include <linux/types.h>
>> >> +
>> >> +#define GNA_DRV_NAME	"gna"
>> >
>> > Way too generic, no one knows what "gna" is.
>> >
>> 
>> "intel gna" is much more verbose in search engines.
>> As we do not (plan to) have more "gna" drivers, is the following ok?:
>> 
>> intel-gna
>> 
>> the change would imply the following:
>> 
>> prompt$ lspci -s 00:00.3 -vvvv
>> 00:00.3 System peripheral: Intel Corporation Device 3190 (rev 03)
>> 	Subsystem: Intel Corporation Device 2072
>>   ....
>> 	Kernel driver in use: intel-gna
>> 	Kernel modules: gna
>> 
>> is it ok?
>
> Why not intel-gna as the kernel module as well?
>
>> also, how about the interface to library (it's part of one of next patches)?:
>> prompt$ file /dev/gna0
>> /dev/gna0: character special (235/0)
>> 
>> can "gna" stay intact here?
>
> Again, I have no idea what "gna" is, so you might want to pick something
> more descriptive?
>
>> I'm pointing this out, because gna exists on the market for a while and
>> changing the above may have some impact we'd like to avoid.
>
> If it exists but Linux does not support it, how would anyone know about
> it?  :)
>
> Please use real terms where possible.
>
> thanks,
>
> greg k-h

summarizing gna name justification topic, is the intel_gna.ko driver's
following layout within kernel code OK for You?:
1. driver/module name:
   prompt$ lspci -s 00:00.3 -vvvv
   00:00.3 System peripheral: Intel Corporation Device 3190 (rev 03)
     ....
     Kernel driver in use: intel_gna
     Kernel modules: intel_gna

2. mv drivers/misc/gna/* drivers/misc/intel_gna/

3. prompt$ file /dev/intel_gna0     
/dev/intel_gna0: character special (10/120)

# ..., /dev/intel_gna1, /dev/intel_gna2 for subsequent devices