linux-kernel - Re: [PATCH] Platform: x86: chromeos_laptop: defer probing if no i2c busses found

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Message-ID: <CAOesGMj6nyjYjxQ23Vk0L76fYQo7YPeKoKrPptq8TVdv7Cwa-g@mail.gmail.com>
Date:	Thu, 18 Apr 2013 15:05:47 -0700
From:	Olof Johansson <olof@...om.net>
To:	Matthew Garrett <matthew.garrett@...ula.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"platform-driver-x86@...r.kernel.org" 
	<platform-driver-x86@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Benson Leung <bleung@...omium.org>, dirk@...ndel.org,
	Olof Johansson <olof@...om.net>
Subject: Re: [PATCH] Platform: x86: chromeos_laptop: defer probing if no i2c
 busses found

On Thu, Apr 18, 2013 at 2:55 PM, Olof Johansson <olof@...om.net> wrote:
> If chromeos_laptop is loaded before the DRM driver, the i2c busses will
> not yet be available. Defer probe for that case and try again later.
>
> Trickling the error up to the module init function is unfortuantely a
> little awkward, since the i2c bus lookup and device registration happens
> as a dmi callback.

Uh, wait, hold off on this. I'm returning -EPROBE_DEFER from the
module init function. It's not valid outside of the driver model.


-Olof
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