Am 18.06.14 10:57, schrieb Christian Zigotzky:
Am 18.06.14 08:51, schrieb Michael Ellerman:
On Tue, 2014-06-10 at 15:20 +0200, Christian Zigotzky wrote:
Hi All,
Could you help me to remove the changes of the PCI code, please? Or
which patches shall I remove to get the old PCI code?
Hi Christian,
Thanks for doing the bisect. It wasn't clear why that change was
causing your
issue, so I guess we're a bit stuck.
Olof (on CC), was going to try and look at it when he got some spare
time.
Please keep him on CC.
cheers
Hi Michael,
Thank you for your answer. Adrian told me the reason about this issue.
Quote Adrian:
As I recall, PCI resource allocation on Nemo was always a little
strange due to using an AMD south bridge together with the PA6T north
bridge. The south bridge does not behave as a standard PCIe device,
but instead presents itself as multiple devices on the PCIe root bus.
This is not compliant with the PCIe specification. We modified the
core powerpc PCI code so that Nemo could boot, but the changes to PCI
code in 3.15 have broken the old workaround. I don't understand the
PCI changes in 3.15 enough to comment further at this point.
Regards,
Adrian
Quote end
Cheers,
Christian
But my opinion is, that's normal for the SB600 south bridge to presents
itself as multiple devices on the PCIe bus on x86 PCs. I see a lot of
PCs with SB600 south bridge on the internet. And the Linux kernel works
with this south bridge. Or is it a powerpc issue?
- Christian
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