Hi Andrew On Tue, 7 Jan 2025 at 18:43, Andrew Lunn <andrew@xxxxxxx> wrote: > > > I was just trying to understand the call trace for mdio bus which got > > me confused. > > > > [0] https://lore.kernel.org/all/Z3fKkTSFFcU9gQLg@ryzen/ > > There is nothing particularly unusual in there. We see PCI bus > enumeration has found a device and bound a driver to it. The driver > has instantiated an MDIO bus, which has scanned the MDIO bus and found > a PHY. The phylib core then tried to load the kernel module needed to > drive the PHY. > > Just because it is a PCI device does not mean firmware has to control > all the hardware. Linux has no problems controlling all this, and it > saves reinventing the wheel in firmware, avoids firmware bugs, and > allows new features to be added etc. > > Andrew Thanks for clarifying. -Anand
