[PATCH V3 1/1] ST SPEAr: PCIE gadget suppport

[Andrew Morton]

On Fri, 11 Feb 2011 12:52:04 +0530 pratyush <pratyush.anand at st.com> wrote:

> >>> This interface implies that there will only ever be one device in the
> >>> machine, yes?  Seems a bit short-sighted?
> >>>
> >>
> >> This device supports only one BAR in EP mode.
> > 
> > I don't understand that.
> > 
> > What happens if someone builds a computer with three of these devices
> > in it?
> > 
> 
> I understood it. I will modify the code to work with multiple instances of
> pcie device.

I don't think you need to go that far, unless you see a significant
likelihood think that such a computer might be created one day.  This
depends on how hard and risky such a change is, of course.

But the current driver's userspace interface should at least
anticipate the possibility, so you aren't trapped into a weird or
non-back-compatible interface in the future.

So for now you might choose to do something as simple as renaming
/config/pcie-gadget to /config/pcie-gadget0 and leave it at that.