-----Original Message-----
From: linuxppc-dev-bounces+b38951=3Dfreescale.com@lists.ozlabs.org
[mailto:linuxppc-dev-bounces+b38951=3Dfreescale.com@lists.ozlabs.org] On
Behalf Of Kumar Gala
Sent: Saturday, March 17, 2012 5:04 AM
To: <redacted>
Cc: Zhao Chenhui-B35336; Liu Shuo-B35362; Zang Roy-R61911; Liu Shuo-
B35362; Wood Scott-B07421; linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH] powerpc/85xx: Add machine check handler to fix PCIe
erratum on mpc85xx
=20
=20
On Feb 10, 2012, at 2:09 AM, [off-list ref]
[off-list ref] wrote:
=20

quoted

From: Liu Shuo <redacted>

A PCIe erratum of mpc85xx may causes a core hang when a link of PCIe
goes down. when the link goes down, Non-posted transactions issued
via the ATMU requiring completion result in an instruction stall.
At the same time a machine-check exception is generated to the core
to allow further processing by the handler. We implements the handler
which skips the instruction caused the stall.

Signed-off-by: Zhao Chenhui <redacted>
Signed-off-by: Li Yang <redacted>
Signed-off-by: Liu Shuo <redacted>
---
arch/powerpc/kernel/cpu_setup_fsl_booke.S |    2 +-
arch/powerpc/kernel/traps.c               |    3 ++
arch/powerpc/sysdev/fsl_pci.c             |   36

+++++++++++++++++++++++++++++

quoted

arch/powerpc/sysdev/fsl_pci.h             |    6 +++++
4 files changed, 46 insertions(+), 1 deletions(-)

=20
Should we have a check to make sure the hose is for PCIe and not PCI?
=20
- k

Due to errata spec pcie check is necessary.
I will send a new version of this patch to solve this problem soon.

Thanks.

Btw, from now on I will follow this patch instead of Liu Shuo.
- Jia Hongtao.