netdev - Re: [PATCH net-next v1 05/14] amd-xgbe: Add additional debugfs support

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Date:   Fri, 18 Aug 2017 07:58:03 -0500
From:   Tom Lendacky <thomas.lendacky@....com>
To:     David Miller <davem@...emloft.net>, andrew@...n.ch
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH net-next v1 05/14] amd-xgbe: Add additional debugfs
 support

On 8/18/2017 12:02 AM, David Miller wrote:
> From: Andrew Lunn <andrew@...n.ch>
> Date: Fri, 18 Aug 2017 02:30:57 +0200
> 
>> On Thu, Aug 17, 2017 at 07:02:50PM -0500, Tom Lendacky wrote:
>>> Add additional debugfs support for reading / writing registers of any
>>> attached external phy devices as well as the SFP eeprom data.
>>
>> Hi Tom
>>
>> What is wrong with using the standard APIs for this?
>>
>> ethtool --moduile-info
>>
>> ioctls SIOCGMIIREG and SIOCSMIIREG.
> 
> Yeah debugfs is a horrible choice for this.
> 
> debugfs in general should be strongly avoided.  We have rich eneough
> facilities to export just about anything that is actually appropriate
> and useful, and where we do not existing facilities should be extended
> as needed rather than ignored.

I was intending this to be purely debugging and that's why I chose
debugfs as opposed to ethtool.  I can switch over to using ethtool
though.  I'll resubmit the series without this patch and look at
moving to this to ethtool as a separate patch later.

Thanks,
Tom

>