Re: [PATCH v2 01/12] device: property: delay device-driver matches

From: "Rafael J. Wysocki" <rafael-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Tomeu Vizoso
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	Greg Kroah-Hartman
	<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>
Subject: Re: [PATCH v2 01/12] device: property: delay device-driver matches
Date: Fri, 17 Jul 2015 01:41:16 +0200	[thread overview]
Message-ID: <CAJZ5v0gMx=DA0f8i9wdMvkYTyOhr0WKh-T6L7rjcxeaAjNMW3g@mail.gmail.com> (raw)
In-Reply-To: <20150716202312.GD11162-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>

Hi Mark,

On Thu, Jul 16, 2015 at 10:23 PM, Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:
> On Wed, Jul 01, 2015 at 11:40:56AM +0200, Tomeu Vizoso wrote:
>
>> Delay matches of platform devices until late_initcall, when we are sure
>> that all built-in drivers have been registered already. This is needed
>> to prevent deferred probes because of some dependencies' drivers not
>> having registered yet.
>
> I have to say I'm still not 100% clear that special casing platform
> devices makes sense here - I can see that platform devices are usually
> the first devices to instantiate but there are other kinds of devices
> and it's not obvious what the benefit of specifically picking out
> platform devices as opposed to just deferring all devices is.

Some existing devices cannot be deferred without redesigning things quite a bit.

What I was talking about, though, was to use an opt-in mechanism for
that which could be set for all platform devices, for example, by
default, but it might be set for other bus types too if that's useful.

Thanks,
Rafael
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