On Wed, Dec 14, 2005 at 05:16:13PM -0800, Ajay Jain wrote: > 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.
Which all points to a problem in your host controller code :) Again, do you have a pointer to your driver code where we can see it? thanks, greg k-h ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
