On Wed, Jan 13, 2021 at 3:48 AM Marc Zyngier <m...@kernel.org> wrote: > > 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! ;-) >
Yay! Thanks for confirming Nicolas. -Saravana
