On Tuesday 12 April 2005 3:18 pm, Jaroslav Flidr wrote: > For those who are interested and still using SA1111-based architecture > (e.g. ziti): the ohci-recommended way of handling the WDH interrupt - > reading the done_head pointer and testing its LSB without reading the > interrupt status register must not be used. It appears that the SA1111 > host controller never sets that bit ... > > The fix is obvious. Either always read the interrupt status register or > always clear the SF bit in it.
Or better yet, always read it iff the controller's an SA-1111. No point in slowing down the IRQ paths by needless chip accesses on other cpus. It'd be reasonable to define a new quirk flag for "WDH_BROKEN"; I think it may not only be an SA1111 iseue. Got patch? :) - Dave ------------------------------------------------------- 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://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
