linux-kernel - Re: [PATCH 2/3] firmware: Add CONFIG_BUILTIN

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Message-Id: <200805251414.04509.mb@bu3sch.de>
Date:	Sun, 25 May 2008 14:14:03 +0200
From:	Michael Buesch <mb@...sch.de>
To:	Marcel Holtmann <marcel@...tmann.org>
Cc:	Johannes Berg <johannes@...solutions.net>,
	David Woodhouse <dwmw2@...radead.org>,
	Sam Ravnborg <sam@...nborg.org>, linux-kernel@...r.kernel.org,
	aoliva@...hat.com, alan@...rguk.ukuu.org.uk,
	Abhay Salunke <Abhay_Salunke@...l.com>, kay.sievers@...y.org,
	Takashi Iwai <tiwai@...e.de>
Subject: Re: [PATCH 2/3] firmware: Add CONFIG_BUILTIN_FIRMWARE option

On Sunday 25 May 2008 13:54:32 Marcel Holtmann wrote:
> I am okay with userspace supporting namespacing with subdirectories  
> and see the point why it helps, but the important here is that  
> userspace must support this. It should not be done inside the kernel.

The decision is currently not made in the kernel. It's a udev
decision to use / as directory separator. We exploit that udev
feature to use a convenient dir structure. But that is unrelated
to how any new database will handle it. The in-kernel database should
treat / like any other char.

> So we have to change udev to look for /lib/firmware/<driver>/ 
> <filename> which perfectly fine, but the <driver> part needs to be  
> derived from struct device and not from the <filename> part.

What if I want 2 or 3 different firmware versions installed at once?
I'll have to play dirty tricks with the filenames then and put several
unrelated firmware versions into one directory. That's going to be a mess.

-- 
Greetings Michael.
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