Re: [PATCH v3] PCI: dw-rockchip: Enable async probe by default

["Danilo Krummrich" <dakr@kernel.org>]

On Thu Mar 12, 2026 at 1:48 PM CET, Robin Murphy wrote:
> On 2026-03-11 9:09 pm, Danilo Krummrich wrote:
>>  From a driver-core perspective I think we're rather limited on what we can do;
>> we are already in async context at this point and can't magically go back to
>> initcall context.
>> 
>> So, the only thing I can think of is to kick off work on a workqueue, which in
>> the end would be the same as the deferred probe handling.
>
> Hmm, in fact, isn't the deferred probe mechanism itself actually quite
> appropriate?

Yes, I've also mentioned this in [1], including the fact that it technically
even complies with the guarantees given by PROBE_FORCE_SYNCHRONOUS. I.e. the
documentation says:

	Use this to annotate drivers that need their probe routines to run
	synchronously with driver and device registration (with the exception of
	-EPROBE_DEFER handling - re-probing always ends up being done
	asynchronously).

However, I'm still not sure how I feel about this, since I consider this to be
more like a workaround that just moves things to a "more approprite" async
context.

On the other hand, eventually we want everything to work with
PROBE_PREFER_ASYNCHRONOUS, so maybe it's also good enough for the time being.

[1] https://lore.kernel.org/driver-core/DGZJBMG2Y738.2MU5LXVGEDD47@kernel.org/