On Mon, Feb 20, 2023 at 06:29:33PM +0000, Marc Zyngier wrote: > Lockdep also reports[1] a possible circular locking dependency between > phy_attach_direct() and rtnetlink_rcv_msg(), which looks interesting. > > [1] https://paste.debian.net/1271454/ Adding Andrew, but really this should be in a separate thread, since this has nothing to do with MSI. It looks like the open path takes the RTNL lock followed by the phydev lock, whereas the PHY probe path takes the phydev lock, and then if there's a SFP attached to the PHY, we end up taking the RTNL lock. That's going to be utterly horrid to try and solve, and isn't going to be quick to fix. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
