linux-kernel - Re: [PATCH] drivercore: Add driver probe deferral mechanism

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Message-ID: <CAPXgP12eg1diui_78rqaVijKbxvRcpZhsC35i9w_Js9vr2OGWA@mail.gmail.com>
Date:	Tue, 5 Jul 2011 18:11:14 +0200
From:	Kay Sievers <kay.sievers@...y.org>
To:	Greg KH <gregkh@...e.de>
Cc:	Arnd Bergmann <arnd@...db.de>,
	Grant Likely <grant.likely@...retlab.ca>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	linux-kernel@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH] drivercore: Add driver probe deferral mechanism

On Tue, Jul 5, 2011 at 17:50, Greg KH <gregkh@...e.de> wrote:

> I wonder if doing this all from a workqueue in the first place is going
> to cause problems as probe isn't normally done this way at all.

Yeah, I would expect unforeseen problems with the async thread too.
It's probably all solvable, but it sounds troublesome to find out if
things go wrong.

We have sync hooks (BUS_NOTIFY_*) where any kind of code can subscribe
to when devices get added or get bound to a driver. Can't the code
that relies on later hookups to already existing devices/bindings not
just plug into that?

Thanks,
Kay
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