> > > > which piece of code initiated the DMA? > > I am not a specialist on ohci, but have a look at ohci_hub_resume() >
I can not find explicit code which initialises DMA. Could it be pci_set_master? > It dispatches among the drivers sharing a major number, but you are > not required to use the usb major. > But device drivers, e.g. usb-skeleton also register itself with USBMAJOR number. In this case, which code is called when user invoke open() with, for example, /dev/usb/skel? In which scenario, usb_open() is invoked? Thanks a lot for help, Li Xinyi ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
