linux-kernel - Re: [PATCH] PCI: nVidia's MCP61 ethernet card needs quirk for wrong class

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Message-ID: <Pine.LNX.4.64.0710011720210.7567@jikos.suse.cz>
Date:	Mon, 1 Oct 2007 17:24:37 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Jeff Garzik <jgarzik@...ox.com>
Cc:	Greg KH <greg@...ah.com>, Ayaz Abdulla <aabdulla@...dia.com>,
	linux-pci@...ey.karlin.mff.cuni.cz, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI: nVidia's MCP61 ethernet card needs quirk for wrong
 class

On Mon, 1 Oct 2007, Jeff Garzik wrote:

> > > There are other network devices that do not claim 
> > > PCI_CLASS_NETWORK_ETHERNET either.
> > Nor any other PCI_CLASS_NETWORK subclass?
> Correct.

BTW do you have some examples off the top of your head?

> > What would you recommend as a method for userspace to detect whether 
> > given hardware is a network card, supposing that there is no driver 
> > bound to it yet?
> Note the mention of "weird cases" You come up with a general method, 
> then you have to deal with exceptions to that general method.

Sure. Still don't see why to do it in kernel, when it is hardware-related 
though.

> Another example:  8139too and 8139cp both claim to support 
> (0x10EC,0x8139) PCI IDs.  The distro installer needs additional 
> information to know to read the PCI revision, which is what determines 
> whether or not to use 8139cp driver.

That's also pretty ugly, sure.

> Sometimes life is just not as simple as you would like it to be :)

You tell me :) There is a load of quirks for individual devices that claim 
themselves to be HID-compliant, but break the specs in various different 
creative ways :)

-- 
Jiri Kosina
SUSE Labs
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