Re: [RFC PATCH net-next 0/3] Make the PHY library stop being so greedy when binding the generic PHY driver

From: Andrew Lunn
Date: Thu Sep 02 2021 - 16:07:59 EST

> The interrupt controller _has_ been set up. The trouble is that the
> interrupt controller has the same OF node as the switch itself, and the
> same OF node. Therefore, fw_devlink waits for the _entire_ switch to
> finish probing, it doesn't have insight into the fact that the
> dependency is just on the interrupt controller.

That seems to be the problem. fw_devlink appears to think probe is an
atomic operation. A device is not probed, or full probed. Where as the
drivers are making use of it being non atomic.

Maybe fw_devlink needs the third state, probing. And when deciding if
a device can be probed and depends on a device which is currently
probing, it looks deeper, follows the phandle and see if the resource
is actually available?