On Thu, 11 Mar 2010 18:53:16 -0500 (EST) Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > Although usbmon _is_ called after unmap_urb_for_dma(), that's not where > the unmapping actually takes place! Transfers coming through the > scatter-gather library are unmapped when sg_clean() in message.c calls > usb_buffer_unmap_sg(), which doesn't happen until after the entire > transfer is complete. > Offhand, I can't think how to fix this. I'm open to suggestions. I don't know either. I suppose we could go back to insane tricks with taking the DMA address and then converting it into some kind of virtual address. But that opens us to problems of that approach (e.g. oops on Opteron or trying to add a method to all IOMMUs that does this). -- Pete -- 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
