On Fri, Jul 09, 2021 at 05:33:36PM +0200, Geert Uytterhoeven wrote: > Hi all, > > I'm investigating a network failure after kexec on the Renesas Koelsch > and Salvator-XS development boards, using the sh-eth or ravb driver. Personally, I've never liked the reset support at PHY device level due to problems like the one you've identified here. I've tended to use the bus-level reset in preference to the PHY-level reset, particularly because when you have multiple PHYs on the bus all sharing a common reset, it seems to be the most sensible approach - and I see a single PHY as no different from multiple PHYs on the bus. However, I can see the argument for using the PHY level, but as you note, that can create chicken and egg issues. I'm not entirely sure why we decide to hold a PHY in reset when we've found it but not started to make use of it - we don't do that with other devices in the system. Why are PHYs special? -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
