On Fri, 21 Aug 2009, David Vrabel wrote: > > There's an advantage > > to always having a pointer to the data buffer available. This is > > related to usbmon and those other changes in the DMA setup. > > What data buffer? There's nothing sensible you can point > transfer_buffer or transfer_dma to so I don't see how it helps. That's not entirely true. If the data isn't in high memory then sg_virt(sg) gives a useful address. If the host controller doesn't support DMA, for instance, this will always be true. > usbmon is currently broken for urbs with sg lists. It doesn't have to be completely broken. 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
