[U-Boot] [ARM] one warning left for all ARM boards

[Tom Rini <trini@ti.com>]

On Tue, Jul 10, 2012 at 12:46:21PM +0400, Ilya Yanok wrote:
> Hi guys,
> 
> On Tue, Jul 10, 2012 at 12:37 PM, Tom Rini <trini@ti.com> wrote:
> 
> > > > > What do we want to do about the USB issue (on ARM platforms, with
> > EHCI,
> > > > > with >32byte alignment requirements, if dcache isn't build-time
> > > > > disabled, USB is unusable, a change from previous releases), for this
> > > > > release?  Are we going to hope the alignment issues can be flushed
> > out
> > > > > and fixed well enough before the final release?  Should we go with
> > > > > disable the dcache now, continue working on it for the next?
> > > >
> > > > What are the chances that the issue be fixed?
> > >
> > > Low ... this is some deep crap that's growing through uboot as whole :-(
> > And
> > > it's not only USB.
> >
> > Then I propose 1, 3, 4, 5, 6 from my v4 series (remove dcache_off
> > call from ehci-omap.c as it's wrong, build-time disable DCACHE on USB
> > enabling platforms).  Yes, we're papering over bugs for a release, but
> > we (a) know we're doing it and (b) are trying to fix them and (c) can't
> > fix them in time.
> 
> 
> I will resend the series this evening. There is no bounce buffering support
> so unaligned operations (unaligned address passed by user) are broken but
> otherwise I think everything works.
> 
> And I'd really like to make runtime cache disabling work again. Probably we
> can rename {flush,invalidate}_dcache_range() to
> __{flush,invalidate}_dcache_range() and call these functions there we
> really need to do these operations regardless of cache being enabled. Then
> we could create new {flush,invalidate}_dcache_range() and do if
> (dcache_enabled()) check in them,,,

We've got a release date now.  If you think you can get this done and
tested in time, OK.  But if we don't have this by -rc2 time we need to
put in the big stupid fix instead (since not all distributions come to
me with questions about things, I fear some may say USB doesn't work and
hold back for who knows how long).

-- 
Tom
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