Re: bnx2 fails to compile on parisc because of missing get_dma_ops()

FUJITA Tomonori
2010-06-17T12:21:31Z

On Wed, 16 Jun 2010 23:24:44 -0700
"Michael Chan" <mchan@broadcom.com> wrote:

> Michael Chan wrote:
> >
> > Paul Mundt wrote:
> >
> > > If you want to have a micro-optimization for the consistent DMA
> > > case, you can check dma_is_consistent(), which is part of the API and
> > > will be variable on certain platform configurations (ie, some may be
> > > consistent with PCI but not on other busses, etc.)
> > >
> > >
> >
> > Thanks for the tip. I didn't know about the dma_is_consistent() API.
> > I'll use this to fix it then.
> >
>
> David, why is dma_is_consistent() always returning 1 on sparc? The
> streaming DMA is not consistent.

I think that there are some confusion about dma_is_consistent(). Some
architectures think that dma_is_consistent() is supposed to return 1
if they can allocate coherent memory (note that some architectures
can't allocate coherent memory).