Re: [PATCH 1/4] iommu/tegra-smmu: Add debugfs support

[Thierry Reding <thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

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On Fri, Mar 27, 2015 at 11:07:24AM +0100, Thierry Reding wrote:
> From: Thierry Reding <treding-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
> 
> Provide clients and swgroups files in debugfs. These files show for
> which clients IOMMU translation is enabled and which ASID is associated
> with each SWGROUP.
> 
> Cc: Hiroshi Doyu <hdoyu-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
> Signed-off-by: Thierry Reding <treding-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
> ---
>  drivers/iommu/tegra-smmu.c | 109 +++++++++++++++++++++++++++++++++++++++++++++
>  include/soc/tegra/mc.h     |   5 +++
>  2 files changed, 114 insertions(+)

Hi Joerg,

I forgot to mention that this patch depends on another patch that I plan
to take through the Tegra tree. That patch adds the group names that are
used by the debugfs support introduced here.

There are a couple of ways to solve this: omit this patch for v4.1 and
merge it for v4.2, at which point the dependency will have been merged.
That's obviously the simplest one and given that this is debugfs support
it isn't very critical, just nice to have.

Another possibility would be for you to ack this patch so that I can
take it into the same branch as the dependency. The remainder of this
series doesn't depend on either of the two patches, so they should be
fine for you to take into your tree.

Yet another alternative would be for me to provide a stable branch that
can be merged into the Tegra and IOMMU trees, but quite frankly I don't
think it's worth jumping through hoops like that for this particular
patch. I'd prefer either the first or second alternative, whichever
suits you best.

Thanks,
Thierry

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