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Date: Wed, 22 Jul 2026 07:42:46 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Stefan Agner <stefan@agner.ch>
Cc: "David S. Miller" <davem@davemloft.net>, Eric Dumazet
 <edumazet@google.com>, Paolo Abeni <pabeni@redhat.com>, Andrew Lunn
 <andrew+netdev@lunn.ch>, "Russell King (Oracle)"
 <rmk+kernel@armlinux.org.uk>, Maxime Chevallier
 <maxime.chevallier@bootlin.com>, Ovidiu Panait
 <ovidiu.panait.rb@renesas.com>, Maxime Coquelin
 <mcoquelin.stm32@gmail.com>, Alexandre Torgue
 <alexandre.torgue@foss.st.com>, netdev@vger.kernel.org,
 linux-stm32@st-md-mailman.stormreply.com,
 linux-arm-kernel@lists.infradead.org, regressions@lists.linux.dev
Subject: Re: [PATCH net v2] net: stmmac: resume PHY before hardware setup
 when opening the interface
Message-ID: <20260722074246.689401d1@kernel.org>
In-Reply-To: <20260707195425.405989-1-stefan@agner.ch>
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	<20260707195425.405989-1-stefan@agner.ch>
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On Tue,  7 Jul 2026 21:54:25 +0200 Stefan Agner wrote:
> Since the referenced commit, changing the MTU on a running interface no
> longer disconnects and reconnects the PHY; __stmmac_release() merely
> stops phylink, which also suspends the PHY (BMCR power-down) when WoL
> is not enabled. __stmmac_open() then performs the DMA software reset in
> stmmac_hw_setup() before phylink_start() resumes the PHY again.

This patch is 2 weeks old now, which is the time horizon for most 
of our systems. Please repost if it's still relevant.