[PATCH] powerpc/85xx: Add machine check handler to fix PCIe erratum on mpc85xx

[Kumar Gala]

On Feb 10, 2012, at 2:09 AM, <shuo.liu at freesacle.com> <shuo.liu at freesacle.com> wrote:

> From: Liu Shuo <shuo.liu at freescale.com>
> 
> 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 <b35336 at freescale.com>
> Signed-off-by: Li Yang <leoli at freescale.com>
> Signed-off-by: Liu Shuo <b35362 at freescale.com>
> ---
> arch/powerpc/kernel/cpu_setup_fsl_booke.S |    2 +-
> arch/powerpc/kernel/traps.c               |    3 ++
> arch/powerpc/sysdev/fsl_pci.c             |   36 +++++++++++++++++++++++++++++
> arch/powerpc/sysdev/fsl_pci.h             |    6 +++++
> 4 files changed, 46 insertions(+), 1 deletions(-)

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

- k