On Mon, 15 Mar 2010, Alan Stern wrote: > On Fri, 12 Mar 2010, Alan Stern wrote: > > > Maybe we could have the scatter-gather library put pointers to the > > scatterlist elements in the URBs, and then for each URB have usbmon > > call dma_sync_sg() with nelems set to 1 (see > > Documentation/DMA-API.txt). I'm not sure whether this will work > > properly if the original scatter-gather list contained more than one > > element, but it probably will. I can ask. > > Here's a patch. Oliver, does it fix your problem? Oliver, has there been any opportunity to test this? I'd like to get it submitted well before 2.6.34 is released. http://marc.info/?l=linux-usb&m=126901183419219&w=2 On another note, I just noticed a little problem in the anchor API. usb_unlink_anchored_urbs() tries to unlink the URBs on the anchor's list, so long as the list is non-empty. But contrary to the comment, unlinking doesn't remove an URB from the anchor until the URB completes, so this will end up busy-waiting for the completions. The loop should skip over URBs that have already been unlinked (urb->unlinked != 0). Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
