On Thu, 19 Jun 2025 16:05:37 -0400 Sean Anderson wrote:

Returning EPROBE_DEFER after probing a bus may result in an infinite
probe loop if the EPROBE_DEFER error is never resolved. For example, if
the PCS is located on another MDIO bus and that MDIO bus is missing its
driver then we will always return EPROBE_DEFER. But if there are any
devices on our own MDIO bus (such as PHYs), those devices will be
successfully bound before we fail our own probe. This will cause the
deferred probing infrastructure to continuously try to probe our device.

To prevent this, split the MAC and MDIO functionality into separate
auxiliary devices. These can then be re-probed independently.

There's a, pardon the expression, C++-like build failure here
culminating in:

drivers/net/ethernet/xilinx/xilinx_axienet_main.c:3225:1: error: redefinition of '__exittest'
drivers/net/ethernet/xilinx/xilinx_axienet_main.c:3225:1: error: redefinition of '__inittest'
drivers/net/ethernet/xilinx/xilinx_axienet_main.c:3225:1: error: redefinition of 'init_module'
drivers/net/ethernet/xilinx/xilinx_axienet_main.c:3225:1: error: redefinition of 'cleanup_module'

I'm guessing the existing module_platform_driver() and the new
module_auxiliary_driver() don't want to be friends when this 
code is built as a module?
-- 
pw-bot: cr