On Wed, 16 Jun 2010 23:24:44 -0700 "Michael Chan" <mchan@xxxxxxxxxxxx> 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). -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
