>> >> However if we don't set a dma mask on the usb device, the mapping >> ends up using swiotlb on machines that have it enabled, which >> is less than desireable. >> >> Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx> > > Fyi for everyone else who was not on irc when Dave&I discussed this: > This really shouldn't be required and I think the real issue is that > udl creates a dma_buf attachement (which is needed for device dma > only), but only really wants to do cpu access through vmap/kmap. So > not attached the device should be good enough. Cc'ing a few more lists > for better fyi ;-) Though I've looked at this a bit more, and since I want to be able to expose shared objects as proper GEM objects from the import side I really need that list of pages. So it looks like this won't really fly. Dave. -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
