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Subject: Re: mal_probe crash
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
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Date: Tue, 13 Jan 2009 08:36:32 +1100
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Cc: Linux/PPC Development <linuxppc-dev@ozlabs.org>,
	Roland Dreier <rdreier@cisco.com>, Sean MacLennan <smaclennan@pikatech.com>
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On Mon, 2009-01-12 at 14:37 +0100, Geert Uytterhoeven wrote:
> On Fri, 9 Jan 2009, Roland Dreier wrote:
> >  > Can you double check that the e1000 isn't copying the PCI resources into
> >  > a unsigned long before ioremap'ing the result, thus cropping the top
> >  > bits ?
> > 
> > as far as I can see, e1000 is using pci_ioremap_bar(), which should do
> > the right thing as long as resource_size_t is the right type (which it
> > looks like it is on PowerPC 44x).
> 
> Indeed, the full 36-bit address is passed to __ioremap() via pci_ioremap_bar(),
> as evidenced from the additional debug output below (see [1]).
> 
> As I don't have any other 3.3V PCI Ethernet cards, I plugged in a 3.3V PCI USB
> 2.0 card in the second PCI slot, and got a similar crash (see [2]).
> 
> Are the PCI slots on the Sequoia known broken under recent Linux kernels? I've
> never used them before...

Hrm, something is indeed wrong, hard to say what tho. My canyonlands
works fine (460EPx) and I can try a Taishan one of these days (440GX
iirc). What is in sequoia ? I think it's a GX no ?

Could be something in the device-tree ?

Cheers,
Ben.