netdev - RE: [PATCH net-next v5 3/3] net: stmmac: Add DWMAC glue layer for Renesas GBETH

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Message-ID:
 <TY3PR01MB11346DD3E3AEB0CCEAB57AE9C86B82@TY3PR01MB11346.jpnprd01.prod.outlook.com>
Date: Mon, 21 Apr 2025 19:23:52 +0000
From: Biju Das <biju.das.jz@...renesas.com>
To: Russell King <linux@...linux.org.uk>
CC: "Lad, Prabhakar" <prabhakar.csengg@...il.com>, Andrew Lunn
	<andrew+netdev@...n.ch>, "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
	<krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Maxime Coquelin
	<mcoquelin.stm32@...il.com>, Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Richard Cochran <richardcochran@...il.com>, Philipp Zabel
	<p.zabel@...gutronix.de>, Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>, Giuseppe Cavallaro
	<peppe.cavallaro@...com>, Jose Abreu <joabreu@...opsys.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-stm32@...md-mailman.stormreply.com"
	<linux-stm32@...md-mailman.stormreply.com>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "linux-renesas-soc@...r.kernel.org"
	<linux-renesas-soc@...r.kernel.org>, Fabrizio Castro
	<fabrizio.castro.jz@...esas.com>, Prabhakar Mahadev Lad
	<prabhakar.mahadev-lad.rj@...renesas.com>
Subject: RE: [PATCH net-next v5 3/3] net: stmmac: Add DWMAC glue layer for
 Renesas GBETH

Hi Russell,

> -----Original Message-----
> From: Biju Das
> Sent: 21 April 2025 20:06
> Subject: RE: [PATCH net-next v5 3/3] net: stmmac: Add DWMAC glue layer for Renesas GBETH
> 
> Hi Russell,
> 
> > -----Original Message-----
> > From: Russell King <linux@...linux.org.uk>
> > Sent: 21 April 2025 20:00
> > Subject: Re: [PATCH net-next v5 3/3] net: stmmac: Add DWMAC glue layer
> > for Renesas GBETH
> >
> > On Mon, Apr 21, 2025 at 01:45:50PM +0000, Biju Das wrote:
> > > Hi All,
> > > FYI, On RZ/G3E, for STR to work with mainline, we need to reinitialize the PHY.
> >
> > Which "mainline" are you using?
> >
> > Reading your emails, I suspect v6.14 rather than something post-dating
> > v6.15-rc1, since your latest email suggests that the PHY driver's
> > ->resume method is not being called early in stmmac's resume. However,
> > commits 367f1854d442 and ef43e5132895 made this happen, which were
> > merged during the merge window, and are thus in v6.15-rc1.
> 
> I am using Linux version 6.15.0-rc2-next-20250417 + renesas_defconfig with CONFIG_PROVE_LOCKING
> enabled.

For me, it looks like issue related to timing, see[1] for details

[1] https://lore.kernel.org/all/TY3PR01MB1134690619EC6CADD07CD2DE186B82@TY3PR01MB11346.jpnprd01.prod.outlook.com/

Please let me know, if you have any patch that I can try out to fix the random timing issue.

Cheers,
Biju