linux-kernel - Re: [PATCH v2 3/4] net: stmmac: add support for Intel Quark X1000

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Date:	Wed, 17 Sep 2014 00:55:32 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	hock.leong.kweh@...el.com
Cc:	peppe.cavallaro@...com, rayagond@...avyalabs.com,
	vbridgers2013@...il.com, srinivas.kandagatla@...com, wens@...e.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	boon.leong.ong@...el.com
Subject: Re: [PATCH v2 3/4] net: stmmac: add support for Intel Quark X1000

From: "Kweh, Hock Leong" <hock.leong.kweh@...el.com>
Date: Wed, 17 Sep 2014 02:41:39 +0000

> Thanks for the pointer. I did a quickly checking on the class number to see if
> I could use it for differentiation the ports number. Whereas I found them 
> both have the same class number as well. Below shows the "lspci" dump to 
> all the PCI devices on Quark X1000 Galileo board (Ethernet controllers are
> 00:14.6 and 00:14.7). Very unfortunately we are unlikely to use the class 
> number as well as pci_device_id for the differentiation.
 ...
> 00:14.6 "Class 0200" "8086" "0937" "8086" "0937"
> 00:14.7 "Class 0200" "8086" "0937" "8086" "0937"

Are you kidding me?  It's a perfect way to identify this device, it
properly uses PCI_CLASS_NETWORK_ETHERNET (0x0200) in both cases and
this will not match any other function on this PCI device at all.

Please do as I suggested and use the PCI class for the differentiation
and matching during probing.
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