[PATCH] EHCI Oops on CONFIG_NOT_COHERENT_CACHE system

[Marcus Comstedt]

Milton Miller <miltonm at bga.com> writes:

> I think its a case of the people that know the architecture agree
> that atomics and DMA do not mix, and that this is an issue for
> usb-devel to fix.

That was precisely the kind of agreement I was looking for.  :-)


> The other question is: does the current access polute the cache by
> reading things where the device is supposed to be writing?

Well, that shouldn't be an issue as the page is cache-inhibited.
And on systems with cache coherency, where the pages are not cache-
inhibited, this would be handled by bus snooping, right?


> My suggestion is take the issue over there, and only cc us here if
> you get pushback over there.

Ok, will do.  Thanks.


  // Marcus