netdev - Re: [RFC PATCH v4] ethtool: add FEC bins histogramm report

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Message-ID: <20250811092142.5b9288d5@kernel.org>
Date: Mon, 11 Aug 2025 09:21:42 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
Cc: Andrew Lunn <andrew@...n.ch>, Michael Chan <michael.chan@...adcom.com>,
 Pavan Chebbi <pavan.chebbi@...adcom.com>, Tariq Toukan <tariqt@...dia.com>,
 Gal Pressman <gal@...dia.com>, intel-wired-lan@...ts.osuosl.org, Donald
 Hunter <donald.hunter@...il.com>, Carolina Jubran <cjubran@...dia.com>,
 Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>,
 netdev@...r.kernel.org
Subject: Re: [RFC PATCH v4] ethtool: add FEC bins histogramm report

On Mon, 11 Aug 2025 17:08:34 +0100 Vadim Fedorenko wrote:
> On 11/08/2025 16:41, Jakub Kicinski wrote:
> > On Sun, 10 Aug 2025 11:52:55 +0100 Vadim Fedorenko wrote:  
> >> Well, the current implementation is straight forward. Do you propose to
> >> have drivers fill in the amount of lanes they have histogram for, or
> >> should we always put array of ETHTOOL_MAX_LANES values and let
> >> user-space to figure out what to show?  
> > 
> > Similar logic to what you have, you can move the put outside of the
> > loop, let the loop break or exit, and then @j will tell you how many
> > entries to fill..  
> 
> I see. Fair, I can do it. After this change there will be no need to
> change the code in the reply size calculation, right?

I think you need to split in two, one for the normal val and one for
the array.