Greg KH wrote: > On Wed, Dec 14, 2005 at 02:30:46PM -0800, Ajay Jain wrote: > >>Hi, >> >>I am doing bulk out transfers using my own usb host-controller driver on >>linux 2.4.21. The device being used is a usb-serial device of type pl203. >>I sometimes see that I get all packets of size zero for a bulk out >>transfer, after an initial valid size. I complete the first bulk >>transfer successfully, but after that I do not get any non-zero byte >>packet to be transferred. Any clues? > > > Does the same thing happen for other types of usb devices with your host > controller driver? > > Have a pointer to your drive anywhere? > > thanks, > > greg k-h > Have checked for interrupt (kb/mouse) xactions. They work perfectly fine. USB-Serial is my first bulk experiment. Actually, when I remove some prints from the code, the upper layer starts giving 0 bytes packet after the first one. When there are certain debug messages in the hcd code, everything works fine.
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