[PATCHv4 3/3] ARM: mvebu: implement L2/PCIe deadlock workaround

Thomas Petazzoni thomas.petazzoni at free-electrons.com
Fri May 16 06:21:41 PDT 2014

Dear Jason Cooper,

On Fri, 16 May 2014 08:58:47 -0400, Jason Cooper wrote:

> > Hum, well, I believe it's OK, but notice that I will very likely have
> > to do a followup patch, because the solution of making all PCI I/O
> > mappings use the MT_UNCACHED memory type, suggested by Arnd, has not
> > been accepted by Will Deacon. So very likely I will have to change
> > again the mach-mvebu/coherency.c code to call a function that makes PCI
> > I/O mappings MT_UNCACHED specifically for the mach-mvebu platform. But
> > that can indeed be a followup patch.
> Ahh, my mistake.  It was late.  I saw the arm,io-coherent was settled
> and mistakenly thought the other proposed changes wouldn't affect this
> patch.
> I could easily drop it if you like.  It's currently the tip of mvebu/soc
> and I haven't done a signed tag for it yet.

I think it's OK, you can keep it: the PCI I/O mapping thing will come
as an addition.

Best regards,

Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering

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