Re: [PATCH v1 0/5] Enable fw_devlink=on by default

[Marc Zyngier]

On 2021-01-13 11:44, Nicolas Saenz Julienne wrote:
> On Thu, 2020-12-17 at 19:16 -0800, Saravana Kannan wrote:
> > As discussed in LPC 2020, cyclic dependencies in firmware that 
> > couldn't
> > be broken using logic was one of the last remaining reasons
> > fw_devlink=on couldn't be set by default.
> >
> > This series changes fw_devlink so that when a cyclic dependency is 
> > found
> > in firmware, the links between those devices fallback to permissive 
> > mode
> > behavior. This way, the rest of the system still benefits from
> > fw_devlink, but the ambiguous cases fallback to permissive mode.
> >
> > Setting fw_devlink=on by default brings a bunch of benefits 
> > (currently,
> > only for systems with device tree firmware):
> > * Significantly cuts down deferred probes.
> > * Device probe is effectively attempted in graph order.
> > * Makes it much easier to load drivers as modules without having to
> >   worry about functional dependencies between modules (depmod is still
> >   needed for symbol dependencies).
>
> FWIW I don't see any issues with this on Raspberry Pi 4 :).

Keep bragging! ;-)

        M.
--
Jazz is not dead. It just smells funny...