On Thursday 07 October 2004 9:32 am, Feyd wrote: > > Are the usb controllers s/g capable?
For some definitions of s/g, yes... > If so, the usb_buffer_alloc could > use vmalloc for high order allocations. ... no, because if you read Documentation/DMA-mapping.txt you'll see an informative "What memory is DMA-able" section that says, among other things, ... you may _not_ use the memory/addresses returned from vmalloc() for DMA. ... That's a general rule for all DMA-capable drivers, not only for USB. - Dave ------------------------------------------------------- This SF.net email is sponsored by: IT Product Guide on ITManagersJournal Use IT products in your business? Tell us what you think of them. Give us Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more http://productguide.itmanagersjournal.com/guidepromo.tmpl _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
