linux-kernel - Re: [PATCH net-next v3 4/5] net: stmmac: add support for RZ/N1 GMAC

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Message-ID: <c99b452b-be35-3a67-1c87-042dbc5fce49@bootlin.com>
Date: Thu, 18 Apr 2024 15:53:07 +0200 (CEST)
From: Romain Gantois <romain.gantois@...tlin.com>
To: Serge Semin <fancer.lancer@...il.com>
cc: Romain Gantois <romain.gantois@...tlin.com>, 
    "David S. Miller" <davem@...emloft.net>, 
    Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, 
    Paolo Abeni <pabeni@...hat.com>, Rob Herring <robh@...nel.org>, 
    Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
    Conor Dooley <conor+dt@...nel.org>, 
    Geert Uytterhoeven <geert+renesas@...der.be>, 
    Magnus Damm <magnus.damm@...il.com>, 
    Alexandre Torgue <alexandre.torgue@...s.st.com>, 
    Jose Abreu <joabreu@...opsys.com>, 
    Maxime Coquelin <mcoquelin.stm32@...il.com>, 
    Russell King <linux@...linux.org.uk>, 
    Clément Léger <clement.leger@...tlin.com>, 
    Thomas Petazzoni <thomas.petazzoni@...tlin.com>, netdev@...r.kernel.org, 
    devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
    linux-renesas-soc@...r.kernel.org, 
    linux-stm32@...md-mailman.stormreply.com, 
    linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH net-next v3 4/5] net: stmmac: add support for RZ/N1
 GMAC

On Thu, 18 Apr 2024, Serge Semin wrote:

> On Thu, Apr 18, 2024 at 01:57:47PM +0200, Romain Gantois wrote:
> > Hi Serge,
> > 
> > On Tue, 16 Apr 2024, Serge Semin wrote:
> > 
> > > > +static int rzn1_dwmac_pcs_init(struct stmmac_priv *priv,
> > > 
> > > > +			       struct mac_device_info *hw)
> > > 
> > > AFAICS hw is unused, and the mac_device_info instance is reached via
> > > the priv pointer. What about dropping the unused argument then?
> > 
> 
> > Unfortunately, this is an implementation of the pcs_init() callback, which is 
> > also used by socfpga (see patch 4/6 in this series). The socfpga implementations 
> > use the hw parameter for both pcs_init() and pcs_exit() so I can't remove it.
> 
> I had that patch content in mind when was writing my comment. There is
> no point in passing the hw-pointer there either because you already
> have the stmmac_priv pointer. There is stmmac_priv::hw field which you
> can use instead in the same way as you do in this patch. Here is the
> respective change for your SoCFPGA patch:
> 

You're right, I'll remove the parameter.

Thanks,

-- 
Romain Gantois, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com