Re: [PATCH net v2] net: stmmac: resume PHY before hardware setup when opening the interface

Jakub Kicinski <[email protected]> Wed, 22 Jul 2026 07:42:46 -0700
Newsgroups dev.linux.lists.regressions,org.infradead.lists.linux-arm-kernel,org.kernel.vger.netdev
Message-ID <[email protected]>
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.