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

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