Date: Thu, 12 Jan 2006 14:05:59 -0700
From: Matthew Wilcox <matthew@wil.cx>
To: Daniel Drake <dsd@gentoo.org>
Cc: Jon Mason <jdmason@us.ibm.com>, mulix@mulix.org,
       linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
       linux-pci@atrey.karlin.mff.cuni.cz
Subject: Re: pcnet32 devices with incorrect trident vendor ID
Message-ID: <20060112210559.GL19769@parisc-linux.org>
References: <20060112175051.GA17539@us.ibm.com> <43C6C0E6.7030705@gentoo.org> <20060112205714.GK19769@parisc-linux.org>
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On Thu, Jan 12, 2006 at 01:57:14PM -0700, Matthew Wilcox wrote:
> On Thu, Jan 12, 2006 at 08:49:42PM +0000, Daniel Drake wrote:
> > interesting:
> > 
> > http://forums.gentoo.org/viewtopic-t-420013-highlight-trident.html
> > 
> > The user saw the correct vendor ID (AMD) in 2.4, but when upgrading to 
> > 2.6, it changed to Trident.
> 
> It looks to me like there used to be a quirk that knew about this bug
> and fixed it.
> 
> The reason I say this is that the lspci -x dumps are the same -- both
> featuring the wrong vendor ID.  Want to dig through 2.4 and look for
> this quirk?

Oh -- found it.  It's still in 2.6:

static void
fixup_broken_pcnet32(struct pci_dev* dev)
{
        if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) {
                dev->vendor = PCI_VENDOR_ID_AMD;
                pci_write_config_word(dev, PCI_VENDOR_ID, PCI_VENDOR_ID_AMD);
        }
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID,                     
fixup_broken_pcnet32);

Wonder why it isn't working now ... someone with a PPC box needs to check
(a) whether this function is being called and (b) if it is called, why
it's not doing what it's supposed to.
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